General description

The TEF6904A is a single chip car radio integrated circuit with FM/AM tuner, stereo
decoder, weak signal processing and audio processing.

FM tuner with double conversion to IF1 = 10.7 MHz and IF2 = 450 kHz with integrated
image rejection for both IF1 and IF2; integrated channel filter with variable bandwidth
control; capable of US FM, Europe FM, Japan FM and Eastern Europe FM. AM tuner with
double conversion to IF1 = 10.7 MHz and IF2 = 450 kHz; capable of Long Wave (LW),
Medium Wave (MW) and full range Short Wave (SW) (11 m to 120 m bands).

Multiplex (MPX) stereo decoder, ignition noise blanker and extensive weak signal
processing.

Audio processing with flexible source selection, volume, balance, fader, input gain control
and inaudible tuning mute. The application of an external processor is possible. Integrated
audio filters for bass and treble and loudness control function.

The device can be controlled via the fast-mode I

C-bus (400 kHz) and includes

autonomous tuning functions for easy control without microcontroller timing. No manual
alignments are required.

Features

FM Radio Frequency (RF) front-end with large dynamic range

Integrated FM channel filter with controlled bandwidth

Fully integrated FM demodulator

Fully integrated stereo decoder with high immunity for birdy noise

FM noise blanker with adaptive detection at MPX and level

Signal quality detection: level, AM wideband, frequency deviation, ultrasonic
noise/adjacent channel

FM weak signal processing: stereo blend, high cut control and soft mute

AM RF Automatic Gain Control (AGC) control circuit for external cascode AGC and
PIN diode AGC

Dual AM noise blanking system

AM weak signal processing: high cut control and soft mute

Low phase noise local oscillator

In-lock detection for optimized adaptive Phase-Locked Loop (PLL) tuning speed

Crystal oscillator reference with low harmonics

Inaudible soft slope tuning mute for AM and FM

Sequential state machine supporting each tuning action

Flexible audio input source selection

TEF6904A

Integrated car radio

Rev. 01 -- 3 February 2006

Preliminary data sheet

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

2 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

Integrated audio processing and tone filtering

Treble, bass and loudness tone control

Volume, balance, fader and input gain control

Optional connection of external sound processor, navigation voice or beep input

Audio controls with Audio Step Interpolation (ASI) for pop-free function

Compact Disc (CD) dynamics compression

Volume Unit (VU)-meter audio level read-out

Quick reference data

Table 1:

Quick reference data

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Supply voltage

analog supply voltage on pins VCC,
VCCPLL, VCCVCO, VCCRF,
AMMIX2OUT1, AMMIX2OUT2,
MIX1OUT1 and MIX1OUT2

8.5

Supply current in FM mode

total supply current inclusive I

V60

102

Supply current in AM mode

total supply current inclusive I

V60

AM overall system parameters

tune

AM tuning frequency

144

288

kHz

522

1710

kHz

2.3

26.1

MHz

sens

sensitivity voltage

= 990 kHz; m = 0.3;

mod

= 1 kHz; B

= 2.15 kHz;

(S+N)/N = 26 dB; dummy aerial
15 pF/60 pF

S/N

ultimate signal-to-noise ratio

THD

total harmonic distortion

200

V < V

< 1 V; m = 0.8;

= 400 Hz

0.4

IP3

3rd-order intercept point

f = 40 kHz

130

FM overall system parameters

tune

FM tuning frequency

108

MHz

sens

sensitivity voltage (RF input voltage
at (S+N)/N = 26 dB)

f = 22.5 kHz; f

mod

= 1 kHz;

DEMP = 1; B = 300 Hz to 22 kHz;
measured with 75

dummy

antenna and test circuit

(S+N)/N

maximum signal plus noise-to-noise
ratio of MPXAM output voltage

= 3 mV;

f = 22.5 kHz;

mod

= 1 kHz; DEMP = 1;

B = 300 Hz to 22 kHz; measured
with 75

dummy antenna and test

circuit

THD

total harmonic distortion

f = 75 kHz

0.5

IP3

3rd-order intercept point

f = 400 kHz

120

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

3 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

[1]

The input gain setting ING and the volume setting VOL define the overall volume. The overall range is limited to

83 dB to +28 dB. For

values > +28 dB the actual value is +28 dB. For overall values <

83 dB the actual value is mute.

Ordering information

Stereo decoder path

channel separation

FMMPX

= 1 kHz

S/N

signal-to-noise ratio

MPXAMIN

= 20 Hz to 15 kHz;

referenced to 1 kHz at 91 % FM
modulation; DEMP = 1

THD

total harmonic distortion

FM mode; DEMP = 1; measured
with 15 kHz brick-wall low-pass
filter; f

MPXAMIN

= 200 Hz to 15 kHz

0.3

Tone/volume control

i(max)

maximum input voltage

THD = 0.2 %; G

vol

6 dB;

pins INAL, INAR, INAC, INAD,
INBL, INBR, INC and IND

THD

total harmonic distortion

configured as non-inverting, single
ended inputs; f

audio

= 20 Hz to

10 kHz; V

= 1 V (RMS)

0.02

0.1

vol

volume/balance gain control

see

Table 83

maximum setting

[1]

minimum setting

[1]

step(vol)

step resolution

treble

treble gain control

TRE[2:0] = 111; TREM = 1

TRE[2:0] = 111; TREM = 0

step(treble)

step resolution gain

bass

bass gain control

BAS[3:0] = 0111; BAM = 1

BAS[3:0] = 0111; BAM = 0

step(bass)

step resolution gain

Table 1:

Quick reference data

...continued

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 2:

Ordering information

Type number

Package

Name

Description

Version

TEF6904AH

QFP80

plastic quad flat package; 80 leads (lead length 1.6 mm); body 14

2.7 mm SOT496-1

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TEF6904A_1

oninklijk

e Philips Electronics N.V

. 2006. All r

ights reser

ed.

Preliminar

y data sheet

Re
v

.
01 -- 3 Februar

y 2006

4 of 108

Philips Semiconductor

TEF6904A

Integrated car radio

Bloc

k dia

gram

Fig 1.

Block diagram of TEF6904AH

reset
hold
fast
readhold

008aaa014

vco

pll

i.c.

vcm

vtc

10 to 13

i.c.

mix1

if1

39 40

from/to EXP SEL. 1, 2

72, 73, 74

30, 31, 32, 33

40
25

CPOUT

VCOGND

VCOTNK

VCOFDB

VCCVCO

VTUNE

VCCPLL

PLLGND

i.c.

VTCM

VTC

n.c.

DAAOUT

FMMIX1IN1

FMMIX1IN2

IFMAGC

TRFAGC

VCCRF

RFGND

IAMAGC

i.c.

VDCPIN

VAMCASFB

VAMCAS

AMMIX1REF

MIX1OUT2

IF1DEC

TAMIFKAGC

AMIF2IN

V60

VREF

GND

VCC

LEVEL

SDA

SCL

ADDR

RROUT

LROUT

RFOUT

LFOUT

AGND

INPR

INPL

PROUT

PLOUT

IND

INC

INBR

INBL

INAD

INAC

INAR

INAL

n.c.

MPXAMIN

MPXAMOUT

XTAL1

XTAL2

n.c.

MIX1OUT1

IFGND

IF1IN

AMIF2DEC

TEF6904AH

STEREO

DECODER

AM NOISE

DETECTOR

FM NOISE

DETECTOR

NOISE

BLANKER

HIGH

CUT

SNC

MULTIPATH,

LEVEL,

ADJACENT CHANNEL,

MODULATION AND

OFFSET

DETECTION

WEAK SIGNAL AND

FM BANDWIDTH

CONTROL LOGIC

HCC

EXP

SEL. 1

INPUT

SELECT

DE-EMPHASIS

s/75

INPUT GAIN,

VOLUME,

BALANCE,

MUTE

LOUDNESS,

BASS,

TREBLE

C-BUS

TUNING

STATE

MACHINE

DEMODULATOR

AM IF NOISE

DETECTOR

FM/AM

RF AGC

CASCODE
CONTROL

IF COUNT

AUDIO STEP INTERPOLATION

EXP

SEL. 2

F/R

FADER

DIV

REF

PLL

÷N

BAND

÷M

÷2

LO2 90

soft mute

tuning

mute

ana

vcc

gnd

vref

swap

snc

hcc

LO1 90

ifbw

antenna DAA

LEVEL

USN

MOD

WAM

OFFS

DEMODULATOR

DGND1

i.c.

DGND2

dig2

dig1

i.c.

36 37

AMMIX2OUT1

AMMIX2OUT2

MIXER

LO2

MIXER

LO2

AMMIX1DEC

AMMIX1IN

LO1

MIXER

LO1

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

5 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

Pinning information

6.1 Pinning

6.2 Pin description

Fig 2.

Pin configuration for QFP80

TEF6904AH

CPOUT

LFOUT

VTUNE

RFOUT

VCCPLL

LROUT

PLLGND

RROUT

i.c.

INPL

VTCM

INPR

VTC

PLOUT

IFMAGC

PROUT

TRFAGC

ADDR

n.c.

SCL

n.c.

SDA

n.c.

DGND2

n.c.

i.c.

DAAOUT

i.c.

FMMIX1IN1

DGND1

FMMIX1IN2

LEVEL

VCCRF

VCC

RFGND

GND

IAMAGC

VREF

i.c.

V60

VDCPIN

VCOGND

VAMCASFB

VCOTNK

VAMCAS

VCOFDB

AMMIX1DEC

VCCVCO

AMMIX1IN

MPXAMOUT

AMMIX1REF

MPXAMIN

MIX1OUT1

n.c.

MIX1OUT2

n.c.

IFGND

n.c.

INAL

n.c.

INAR

n.c.

INAC

n.c.

INAD

IF1DEC

INBL

IF1IN

INBR

AMMIX2OUT1

INC

AMMIX2OUT2

IND

TAMIFKAGC

XTAL2

AMIF2DEC

XTAL1

AMIF2IN

AGND

008aaa015

Table 3:

Pin description

Symbol

Pin

Description

CPOUT

charge pump output

VTUNE

tuning voltage; 3 mA charge pump output

VCCPLL

tuning PLL supply voltage

PLLGND

PLL ground

i.c.

internally connected; leave open

VTCM

IF filter reference voltage

VTC

IF filter center voltage

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

6 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

IFMAGC

PIN diode current FM AGC

TRFAGC

FM and AM RF AGC time constant

n.c.

not connected

n.c.

not connected

n.c.

not connected

n.c.

not connected

DAAOUT

antenna DAA output

FMMIX1IN1

FM mixer 1 input 1

FMMIX1IN2

FM mixer 1 input 2

VCCRF

AM/FM RF supply voltage

RFGND

RF ground

IAMAGC

PIN diode current AMAGC

i.c.

internally connected; leave open

VDCPIN

AM PIN diode DC bias voltage

VAMCASFB

feedback for cascode AM AGC

VAMCAS

cascode AM AGC

AMMIX1DEC

AM mixer 1 decoupling

AMMIX1IN

AM mixer 1 input

AMMIX1REF

AM mixer 1 reference

MIX1OUT1

AM and FM mixer 1 output 1 at IF1

MIX1OUT2

AM and FM mixer 1 output 2 at IF1

IFGND

IF ground

n.c.

not connected

n.c.

not connected

n.c.

not connected

n.c.

not connected

IF1DEC

AM and FM mixer 2 decoupling

IF1IN

AM and FM mixer 2 input

AMMIX2OUT1

AM mixer 2 output 1 at IF2

AMMIX2OUT2

AM mixer 2 output 2 at IF2

TAMIFKAGC

AM IF AGC and FM keyed AGC time constant

AMIF2DEC

AM IF2 input decoupling

AMIF2IN

AM IF2 input

V60

input for FM filter and demodulator supply current

VREF

reference voltage for noise decoupling

GND

ground

VCC

8.5 V supply voltage

LEVEL

AM and FM level voltage output

DGND1

digital ground 1

i.c.

internally connected; leave open

i.c.

internally connected; leave open

Table 3:

Pin description

...continued

Symbol

Pin

Description

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

7 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

Functional description

7.1 FM mixer 1

The FM quadrature mixer 1 converts FM RF (65 MHz to 108 MHz) to an IF frequency of
10.7 MHz. The FM mixer provides image rejection and a large dynamic range. Low and
high injection Local Oscillator (LO) can be selected via the I

C-bus.

DGND2

digital ground 2

SDA

C-bus SDA input and output

SCL

C-bus SCL input

ADDR

C-bus slave address select input

PROUT

audio output to external processor; right channel

PLOUT

audio output to external processor; left channel

INPR

audio input from external processor; right channel

INPL

audio input from external processor; left channel

RROUT

right rear audio output

LROUT

left rear audio output

RFOUT

right front audio output

LFOUT

left front audio output

AGND

analog ground

XTAL1

crystal oscillator 1

XTAL2

crystal oscillator 2

IND

audio input D, signal input

INC

audio input C, common mode or signal input

INBR

audio input B, right channel

INBL

audio input B, left channel

INAD

audio input A, right channel inverted (or other options)

INAC

audio input A, left channel inverted (or other options)

INAR

audio input A, right channel

INAL

audio input A, left channel

n.c.

not connected

n.c.

not connected

n.c.

not connected

MPXAMIN

MPX and AM audio input to radio processing

MPXAMOUT

MPX and AM audio output from tuner part

VCCVCO

VCO supply voltage

VCOFDB

VCO feedback

VCOTNK

VCO tank circuit

VCOGND

VCO ground

Table 3:

Pin description

...continued

Symbol

Pin

Description

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

8 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

7.2 FM RF AGC

AGC detection at the FM front-end mixer input with programmable threshold. When the
threshold is exceeded, the PIN diode drive circuit sources a current to an external PIN
diode circuit, keeping the RF signal level constant. Keyed AGC function is selectable via
the I

C-bus and uses the in-band level information derived from the limiter. The AGC PIN

diode drive circuit can optionally deliver a fixed current; this local mode can be used for
search tuning on absolute RF levels. In AM mode, the FM AGC PIN diode drive circuit can
be set to source a fixed current into the external FM PIN diode circuitry.

7.3 FM mixer 2

The FM quadrature mixer 2 converts 10.7 MHz IF1 to 450 kHz IF2 and includes image
rejection with the integrated channel filter. Two gain settings can be selected to
compensate for high ceramic filter insertion loss.

7.4 FM IF2 channel filter

The order and dynamic range of the FM IF2 channel filter is designed for operation with
only one external ceramic filter. The filter characteristic is optimized to combine high
selectivity with low distortion. The bandwidth of the filter can be set to a range of fixed
settings or automatically via the bandwidth control algorithm. When the automatic mode is
selected the bandwidth depends on the signal conditions.

7.5 FM limiter and level detection

The limiter amplifies the IF filter output signal, removes AM modulations from the IF signal
and supplies a well defined signal for the FM demodulator. From the limiter also the Radio
Signal Strength Information (RSSI) is derived which is converted to a suitable level voltage
with minimum temperature drift.

7.6 FM demodulator

The fully integrated FM demodulator converts the IF signal from the limiter to the
FM multiplex output signal with low distortion.

7.7 Center frequency and bandwidth tuning and center frequency DAA

The center frequency as well as the bandwidth of both the IF filter and demodulator are
coupled to the crystal reference frequency. A coarse alignment (IFCAP) sets the circuit
operating range and the center frequency fine adjustment is achieved with a 6-bit
alignment (IFCF).

7.8 Bandwidth control algorithm

The bandwidth of the IF filter can be selected with 5 bits, directly via I

C-bus or

automatically via the bandwidth control algorithm. The bandwidth control algorithm
detects the amount of adjacent channel interference, the deviation of the desired signal,
detuning, multipath and signal strength to define the optimum bandwidth setting of the
IF filter. Flexibility on the algorithm settings is provided via the I

C-bus control.

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

9 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

7.9 VCO and dividers

The varactor tuned LC oscillator together with the dividers provides the local oscillator
signal for both AM and FM front-end mixers. The VCO has an operating frequency of
approximately 160 MHz to 250 MHz. In FM mode the VCO frequency is divided by 2 or 3.
These dividers generate in-phase and quadrature-phase output signals used in the
FM front-end mixer for image rejection. In AM mode the VCO frequency is divided by 6, 8,
10, 16 or 20 depending on the selected AM band. The amplitude of the VCO is controlled
by a digital AGC to ensure a safe oscillation start-up at a wide range of the loaded Q.

7.10 Crystal oscillator

The crystal oscillator provides a 20.5 MHz signal. A divider-by-two generates in-phase
and quadrature-phase mixer frequencies for the conversion from IF1 to IF2 including
image rejection. The reference divider generates from the crystal frequency various
reference frequencies for the tuning PLL. Also timing signals for the sequential machine
as well as references for the integrated FM channel filter, the stereo decoder and the
integrated audio filters are derived from the crystal reference.

7.11 Tuning PLL

The tuning PLL locks the VCO frequency divided by the programmable divider ratio to the
reference frequency. Due to the combination of different charge pump signals in the
PLL loop filter, the loop parameters are adapted dynamically. Tuning to different
RF frequencies is done by changing the programmable divider ratio. The tuning step size
is selected with the reference frequency divider setting.

7.12 Antenna DAA

For FM operation the antenna Digital Auto Alignment (DAA) measures the VCO tuning
voltage and multiplies it with a factor defined by the 7-bit DAA setting to generate a tuning
voltage for the FM antenna tank circuit (RF selectivity). In AM mode the DAA setting
controls a fixed voltage.

7.13 AM RF AGC control

The AM front-end is designed for the application of an external Junction Field Effect
Transistor (JFET) low noise amplifier with cascode AGC and PIN diode AGC both
controlled by an integrated AGC control circuit. Four AGC thresholds of the detector at the
first mixer input are selectable via I

C-bus. Detectors at the RF mixer input and at the

AMIF2 input prevent undesired overload (see

Figure 39

). AGC information can be read

out via I

C-bus. The PIN diode current drive circuit includes a pull-up current source for

reverse biasing of the PIN diode, when the AGC is not active to achieve a low parasitic
capacitance.

7.14 AM mixer 1

The large dynamic range AM mixer converts AM RF (144 kHz to 26.1 MHz) to an IF
frequency of 10.7 MHz.

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

10 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

7.15 AM IF noise blanker

The spike detection for the AM IF noise blanker is at the output of the AM front-end mixer.
Blanking is realized at the second AM mixer.

7.16 AM IF AGC amplifier and demodulator

The 450 kHz IF2 signal after the ceramic channel selection filter is amplified by the
IF AGC amplifier and demodulated.

7.17 AM level detection

The IF2 signal used for AM IF AGC and demodulation is also used in the limiter circuit for
in-band level detection.

7.18 AM and FM level DAA

The start and slope of the level detector output are programmable to achieve level
information independent on gain spread in the signal channel.

7.19 AM and FM IF counter

The output signal from the limiter is used for IF counting in both AM and FM.

7.20 Tuning mute

A soft slope tuning mute is controlled by the sequential machine for different tuning
actions to eliminate audible effects of tuning and band switching.

7.21 FM stereo decoder

A low-pass filter provides additional suppression of high frequency interferences at the
stereo decoder input and the necessary signal delay for FM noise blanking.

The MPX signal is decoded in the stereo decoder part. An integrated oscillator and pilot
PLL is used for the regeneration of the 38 kHz subcarrier. The required 19 kHz
and 38 kHz signals are generated by division of the oscillator output signal in a logic
circuitry.

By means of a 19 kHz quadrature detector the pilot PLL oscillator frequency is locked to
the incoming 19 kHz stereo pilot. A pilot level voltage derived from a 19 kHz in-phase
detector is used for stereo detection and for generation of an anti-phase 19 kHz signal to
remove the pilot tone from the audio signal.

The signal is then decoded in the decoder part. The L-R side signal is demodulated using
the 38 kHz subcarrier and combined with the main signal to the left and right audio
channel. A fine adjustment is done by adjusting the gain of the L-R signal. A smooth mono
to stereo takeover is achieved by controlling the efficiency of the matrix by the SNC signal
from the weak signal processing block.

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

11 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

7.22 FM and AM AF noise blanker

The FM or AM tuner operation selects between two noise blanker operations optimized for
FM or AM ignition noise suppression.

In FM mode the noise blanker operates as a modified sample and hold circuit with
ultrasonic noise detection on MPX and detection of noise spikes on level.

In AM mode the audio signal is muted during the interference pulse triggered by slew-rate
detection of the audio signal.

7.23 Fixed high cut and high cut control

The high cut part is a low-pass filter circuit with seven bandwidth settings. The cut-off
frequencies of the filter curves can be selected to match different application requirements
(fixed high cut).

The high cut circuit also provides a dynamic control of the filter response, the High Cut
Control (HCC). This function is controlled by the HCC signal from the weak signal
processing.

7.24 De-emphasis

The signal passes the low-pass filter de-emphasis block and is then fed to the source
selector. The de-emphasis time constant can be selected between the standards of 50

and 75

7.25 Weak signal processing

The weak signal processing block detects quality degradations in the incoming signal and
controls the processing of the audio signal accordingly. The weak signal processing block
has three different quality criteria: The average value of the level voltage, AM components
on the level voltage (WAM = wideband AM) and high frequency components in the MPX
signal (USN = ultrasonic noise).

In the weak signal processing block these signals are combined in specific ways and used
for the generation of control signals for soft mute, stereo blend (stereo noise control, SNC)
and HCC. Detector time constants of soft mute, HCC and SNC can be selected
independently.

In AM mode soft mute and HCC are controlled by the average value of the level voltage.

7.26 Audio step interpolation

The tone/volume blocks of source selector, volume/balance, bass/loudness, fader and
output mute include the Audio Step Interpolation (ASI) function. This minimizes audible
pops by smoothing the transitions in the audio signal during the switching of the controls.

7.27 Source selector

The source selector selects one out of several input sources:

One internal stereo signal (AM/FM tuner)

Eight input pins allow many combinations of external sources by means of flexible
input selection

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

12 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

Four of the eight input pins can connect to:

1 stereo signal with differential input (CD-symmetrical)

1 stereo signal with common mode rejection (CD-2) and 1 mono signal (e.g.

BEEP)

2 stereo signals (AUX and AUX-2)

1 stereo signal (AUX) and 2 mono signals (e.g. NAV and BEEP)

The other four input pins can connect to the same options and allow additional
connection to:

1 stereo signal and 1 mono signal with common mode rejection or differential input

(PHONE)

Alternatively the 8 input pins can connect to 2 stereo signals with common mode rejection
and 1 stereo signal or 1 mono signal with common mode rejection or differential input.

7.28 VU-meter read

The input audio level of external sources can read out via the I

C-bus. Audio level

information is available on a logarithmic scale. In radio mode the AM or FM modulation
index is available in the same way.

7.29 Volume and balance

The volume/balance control is used for volume setting and also for balance adjustment.
The control range of the volume/balance control is between +20 dB and

75 dB in steps

of 1 dB.

7.30 CD compression

Dynamic volume compression is available for external input sources. This option is
generally used for audio from CD or other digital formats to reduce the very high dynamic
range of these signals into a range suitable for the car environment.

7.31 Bass

The bass tone control stage controls the low audio frequencies with a modified shelve
curve response. The control range is between +14 dB and

14 dB in steps of 2 dB. Four

different filter cut-off frequencies can be selected.

7.32 Treble

The treble tone control stage controls the high audio frequencies with a shelve curve
response. The control range is between +14 dB and

14 dB in steps of 2 dB. Four

different filter cut-off frequencies can be selected.

7.33 Loudness

An integrated loudness function can be activated which controls bass and treble in relation
to the user volume setting. The control range of the bass frequencies is limited to 20 dB
and the optional treble range to 4 dB. Different volume ranges can be selected for the
loudness control.

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

13 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

7.34 Fader

The fader is located at the end of the tone/volume chain. The balance between the front
and rear channel can be controlled by attenuation of either the front or the rear channel.
Control range is 0 dB to

64 dB with a step size of 1 dB. Optionally the fader attenuation

can be activated for front and rear channels together.

7.35 External processor I/O

The tone control output signal is available on two pins. Furthermore two input pins allow
connection to the fader block for front and rear line outputs, or alternatively for rear output
only. This allows connection of an external sound processing circuit for equalizing,
surround sound or sound stage positioning. Also input or mixing of an external signal
source like navigation voice or beep can be realized.

C-bus protocol

SDA and SCL HIGH and LOW internal thresholds are specified according to both 2.5 V
and 3.3 V I

C-bus, however also SDA and SCL signals from a 5 V bus are supported. The

maximum I

C-bus communication speed is 400 kbit/s in accordance with the I

C-bus fast

mode specification.

Fig 3.

Write mode

ACK-s

DATA

SLAVE ADDRESS W

data transferred

(n bytes

acknowledge)

001aad051

ACK-s

MSA

Fig 4.

Read mode

DATA

ACK-s

ACK-m

DATA

SLAVE ADDRESS R

001aad049

data transferred

1 bytes

acknowledge)

Table 4:

Description of I

C-bus format

Code

Description

START condition

Slave address W

1100 0000b for pin ADDR grounded

1100 0010b for pin ADDR floating

Slave address R

1100 0001b for pin ADDR grounded

1100 0011b for pin ADDR floating

ACK-s

acknowledge generated by the slave

ACK-m

acknowledge generated by the master

not acknowledge generated by the master

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

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Philips Semiconductors

TEF6904A

Integrated car radio

8.1 Read mode

Application restriction to use the read mode: Read transmissions should not be
stopped after read byte 4 (IFBW) since this will disturb level read-out, weak signal
processing and bandwidth control. Read transmission can be stopped after any of the
other read bytes 0 to 3, 5 or 6.

The read data is loaded into the I

C-bus output register at the ACK clock pulse preceding

the data byte.

8.1.1 Read mode: data byte IFCOUNTER

MSA

mode and subaddress byte

Data

data byte

STOP condition

Table 4:

Description of I

C-bus format

...continued

Code

Description

Table 5:

Read register overview

Data byte

Name

Reference

IFCOUNTER

Section 8.1.1

LEVEL

Section 8.1.2

USN/WAM

Section 8.1.3

MOD

Section 8.1.4

IFBW

Section 8.1.5

Section 8.1.6

TEMP

Section 8.1.7

Table 6:

IFCOUNTER - format of data byte 0

IFCM1

IFCM0

IFCS

IFCA

IFC3

IFC2

IFC1

IFC0

Table 7:

IFCOUNTER - data byte 0 bit description

Bit

Symbol

Description

7 and 6

IFCM[1:0]

IF counter mode; IFCM reads 00 immediately after I

C-bus start of

PRESET, SEARCH, AFU, JUMP or CHECK until the first IFC result of the
new tuning is available.

00 = no new counter result available (IFC value is previous result or
reset state)

01 = new counter result available (IFC value is new result)

10 = counter result from AF update (IFC value is AF result, value is
held until I

C-bus read). Also the detector information of LEV, USN,

WAM and MOD shows AF update results.

11 = Power-On Reset (POR) or undefined state of the state machine is
detected. The I

C-bus data is reset to POR state.

IFCS

IF counter sign

0 = the IF counter result indicates a positive RF frequency error

1 = the IF counter result indicates a negative RF frequency error

TEF6904A_1

Preliminary data sheet

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Philips Semiconductors

TEF6904A

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After a tuning action, which is activated by the state machine, the IF counter is reset at
that moment when tuning is established (PLL in-lock). The first counter result is available
from 2 ms after reset. For FM further results can be obtained from 4 ms, 8 ms, 16 ms and
32 ms after reset, the increasing count time attenuates influence of FM modulation on the
counter result. After this, the counter continues at the maximum count time of 32 ms (see

Figure 5

). For AM the count time is fixed to 2 ms and results are available every 2 ms.

After AF Update (AFU) sampling the IF counter read value is held (IFCM = 10) (see

Figure 6

Figure 17

and

Figure 18

) for easy I

C-bus read-out. The counter itself remains

active in the background in 2 ms count time mode. The IF counter data hold is released
after I

C-bus read.

IFCM reads 00 immediately after I

C-bus start of PRESET, SEARCH, AFU, JUMP or

CHECK until the first new tuning IFC result is available.

IFCA

IF counter accuracy

0 = IF counter result with 1 kHz resolution in FM mode and 0.5 kHz
resolution in AM mode

1 = IF counter result with 8 kHz resolution in FM mode and 4 kHz
resolution in AM mode

3 to 0

IFC[3:0]

IF counter result; see

Table 8

Table 7:

IFCOUNTER - data byte 0 bit description

...continued

Bit

Symbol

Description

Table 8:

IF counter result

IFC3

IFC2

IFC1

IFC0

Deviation from nominal value in FM

Deviation from nominal value in AM

IFCA = 0

IFCA = 1

IFCA = 0

IFCA = 1

0 kHz to 1 kHz

reset state

0 kHz to 0.5 kHz

reset state

1 kHz to 2 kHz

0.5 kHz to 1 kHz

2 kHz to 3 kHz

16 kHz to 24 kHz

1 kHz to 1.5 kHz

8 kHz to 12 kHz

3 kHz to 4 kHz

24 kHz to 32 kHz

1.5 kHz to 2 kHz

12 kHz to 16 kHz

4 kHz to 5 kHz

32 kHz to 40 kHz

2 kHz to 2.5 kHz

16 kHz to 20 kHz

5 kHz to 6 kHz

40 kHz to 48 kHz

2.5 kHz to 3 kHz

20 kHz to 24 kHz

6 kHz to 7 kHz

48 kHz to 56 kHz

3 kHz to 3.5 kHz

24 kHz to 28 kHz

7 kHz to 8 kHz

56 kHz to 64 kHz

3.5 kHz to 4 kHz

28 kHz to 32 kHz

8 kHz to 9 kHz

64 kHz to 72 kHz

4 kHz to 4.5 kHz

32 kHz to 36 kHz

9 kHz to 10 kHz

72 kHz to 80 kHz

4.5 kHz to 5 kHz

36 kHz to 40 kHz

10 kHz to 11 kHz

80 kHz to 88 kHz

5 kHz to 5.5 kHz

40 kHz to 44 kHz

11 kHz to 12 kHz

88 kHz to 96 kHz

5.5 kHz to 6 kHz

44 kHz to 48 kHz

12 kHz to 13 kHz

96 kHz to 104 kHz

6 kHz to 6.5 kHz

48 kHz to 52 kHz

13 kHz to 14 kHz

104 kHz to 112 kHz

6.5 kHz to 7 kHz

52 kHz to 56 kHz

14 kHz to 15 kHz

112 kHz to 120 kHz

7 kHz to 7.5 kHz

56 kHz to 60 kHz

15 kHz to 16 kHz

120 kHz

7.5 kHz to 8 kHz

60 kHz

TEF6904A_1

Preliminary data sheet

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Philips Semiconductors

TEF6904A

Integrated car radio

8.1.2 Read mode: data byte LEVEL

After AF update sampling the level read value is held (indicated by IFCM = 10) for easy
I

C-bus read-out. The level detector remains active in the background. The LEV data hold

is released after I

C-bus read.

To reduce the influence of modulation in AM mode the LEV information is additionally
filtered by a slow 60 ms detector. Fast level information is made available during
AF update and check tuning.

For standard operation the following level alignment (byte LEVELALGN; see

Table 43

) is

used:

FM and AM level slope;

LEV = 51 (

LEVEL

= 0.80 V) at

= 20 dB (measured at

= 200

V and V

= 20

FM mode level start; LEV = 78 (V

LEVEL

= 1.47 V) at V

= 20

AM mode level start; LEV = 63 (V

LEVEL

= 1.24 V) at V

= 20

Table 9:

LEVEL - format of data byte 1

LEV7

LEV6

LEV5

LEV4

LEV3

LEV2

LEV1

LEV0

Table 10:

LEVEL - data byte 1 bit description

Bit

Symbol

Description

7 to 0

LEV[7:0]

level detector; this byte indicates the LEVEL voltage between
0.25 V (LEV = 0) and 4.25 V (LEV = 255) from the tuner part;
V

LEVEL

LEV[7:0] + 0.25 V; see

Figure 7

Fig 7.

FM RF antenna input signal and level output voltage

ANT

(mV)

001aab521

LEVEL

(V)

TEF6904A_1

Preliminary data sheet

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Philips Semiconductors

TEF6904A

Integrated car radio

8.1.3 Read mode: data byte USN/WAM

After AF update sampling the USN and WAM read value is held (indicated by IFCM = 10)
for easy I

C-bus read-out. The USN and WAM detectors remain active in the background.

The USN and WAM data hold is released after I

C-bus read.

8.1.4 Read mode: data byte MOD

Table 11:

USN/WAM - format of data byte 2

USN3

USN2

USN1

USN0

WAM3

WAM2

WAM1

WAM0

Table 12:

USN/WAM - data byte 2 bit description

Bit

Symbol

Description

7 to 4

USN[3:0]

ultrasonic noise detector; this value indicates the USN content of the
MPX audio signal; see

Figure 24

3 to 0

WAM[3:0]

wideband AM detector; this value indicates the WAM content of the
LEVEL voltage; see

Figure 24

Table 13:

MOD - format of data byte 3

MOD4

MOD3

MOD2

MOD1

MOD0

STIN

TAS1

TAS0

Table 14:

MOD - data byte 3 bit description

Bit

Symbol

Description

7 to 3

MOD[4:0]

modulation detector; this value indicates the audio modulation; see

Table 15

FM between 0 kHz and 150 kHz FM deviation

AM between 0 % and 200 % modulation

FM offset detector; a read value of 31 indicates offset detection. The
offset detector is part of the FM bandwidth control algorithm and detects
adjacent channel breakthrough.

VU-meter; when an external audio source is selected and VU-meter read
is active (see subaddress 17h; see

Table 98

) MOD indicates the audio

input level (RMS) between 0 V and 2 V; see

Table 15

STIN

stereo indicator; this bit indicates if a stereo pilot signal has been
detected

0 = no pilot signal detected

1 = pilot signal is detected and the FM stereo decoder is activated

1 and 0

TAS[1:0]

Tuning action state; state machine information. The signal TAS informs
about internal control functions of the tuner action state machine. This
way the progress of tuner actions can be monitored by the
microcontroller.

00 = inactive

01 = starting mute

10 = PLL tuning

11 = tuning ready with mute active

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

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Philips Semiconductors

TEF6904A

Integrated car radio

The indicated amplitude levels are approximate values.

In case of FM radio carrier modulation is measured (MPX FM deviation). Timing is fixed
with fast 30 ms release time. Depending upon reception conditions and internal offsets
small modulation levels may be indicated as 0. After AF update sampling the MOD read
value is held (indicated by IFCM = 10) for easy I

C-bus read-out. The MOD detector

remains active in the background. The MOD data hold is released after I

C-bus read.

In case of AM radio carrier modulation is measured (AM). Timing is fixed with fast 30 ms
release time. Modulation may exceed 100 % in case of special modulation schemes as
used by some stations. After AF update sampling the MOD read value is held (indicated
by IFCM = 10) for easy I

C-bus read-out. The MOD detector remains active in the

background. The MOD data hold is released after I

C-bus read.

With external source selection and VU-meter mode disabled (AVUM = 0 and COMP = 0)
FM or AM modulation is indicated equal to radio mode.

Table 15:

MOD detector

MOD4 MOD3 MOD2 MOD1 MOD0 FM radio

AM radio m VU

External source

< 1.5 kHz

< 2 %

< 0.02 V

1.5 kHz

2 %

34 dB

0.02 V

3 kHz

4 %

28 dB

0.04 V

4.5 kHz

6 %

24 dB

0.06 V

6 kHz

8 %

22 dB

0.08 V

7.5 kHz

10 %

20 dB

0.1 V

9.5 kHz

13 %

18 dB

0.13 V

12 kHz

16 %

16 dB

0.16 V

15 kHz

20 %

14 dB

0.2 V

19 kHz

25 %

12 dB

0.25 V

24 kHz

32 %

10 dB

0.32 V

30 kHz

40 %

8 dB

0.4 V

38 kHz

50 %

6 dB

0.5 V

47 kHz

63 %

4 dB

0.63 V

60 kHz

80 %

2 dB

0.8 V

75 kHz

100 %

0 dB

1 V

95 kHz

125 %

2 dB

1.25 V

120 kHz

160 %

4 dB

1.6 V

150 kHz

200 %

6 dB

2 V

OFFS
detection

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

20 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

With external source selection and VU-meter mode enabled (AVUM = 1 or COMP = 1) the
audio input level of the external source is indicated (i.e. the audio level as found on the line
input pins). For stereo signals left and right channel are combined for MOD read
(0.5

L + 0.5

R). VU-meter timing is defined by setting HCT. For AVUM control see

subaddress 17h; see

Table 98

. In case of AF update sampling the AM or FM modulation

value is indicated with data hold (indicated by IFCM = 10) for easy I

C-bus read-out. The

MOD data hold is released after I

C-bus read and VU-meter indication continues.

8.1.5 Read mode: data byte IFBW

8.1.6 Read mode: data byte ID

Table 16:

IFBW - format of data byte 4

RAGC1

RAGC0

ASIA

IFBW4

IFBW3

IFBW2

IFBW1

IFBW0

Table 17:

IFBW - data byte 4 bit description

Bit

Symbol

Description

7 and 6

RAGC[1:0] RF AGC indicator; PIN diode current on pins IAMAGC or IFMAGC

00 =

FM: < 0.05 mA

AM: < 0.1 mA

01 =

FM: 0.05 mA to 0.5 mA

AM: 0.1 mA to 0.5 mA

10 = 0.5 mA to 2.5 mA

11 = > 2.5 mA

ASIA

ASI active; this bit indicates activity of the audio step interpolation
function

0 = ASI is not active

1 = ASI step is in progress

4 to 0

IFBW[4:0]

FM IF filter bandwidth control; 57 kHz (0 0000) to 165 kHz (1 1111). The
bandwidth read data equals the write data definition (at DYN = 0; see

Table 28

Table 18:

ID - format of data byte 5

IFCAPG

ID2

ID1

ID0

Table 19:

ID - data byte 5 bit description

Bit

Symbol

Description

IFCAPG

IF filter gear; read value is used for IFCAP adjustment (byte IFCAP);
see

Table 47

6 to 3

reserved

2 to 0

device type identification 011 = TEF6904A

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

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Philips Semiconductors

TEF6904A

Integrated car radio

8.1.7 Read mode: data byte TEMP

8.2 Write mode

The device is controlled by the I

C-bus. After the Integrated Circuit (IC) address the MSA

byte contains the control of the tuning action via the bits MODE[2:0] and subaddressing
via bits SA[4:0] (see

Figure 8

All circuits are controlled by the CONTROL register. Any data change in the CONTROL
register has immediate effect and will change the operation of the circuit accordingly. The
subaddress range 00h to 05h includes data that may lead to audible disturbance when
changed. Therefore the subaddress range 00h to 05h is not loaded in the CONTROL
register directly but loaded in a BUFFER register instead. This allows the IC to take care
of tuning actions and mute control, freeing the microcontroller from cumbersome controls
and timings. The subaddress range of 06h onwards does not contain such critical data.
I

C-bus information in this range will be loaded in the CONTROL register directly (at

acknowledge of each byte).

Controlled by a state machine the BUFFER data will be loaded in the CONTROL register
for new settings. However at the same time the CONTROL data is loaded in the BUFFER
register. This register swap action allows a fast return to the previous setting because the
previous data remains available in the BUFFER register (see

Figure 9

Via MODE several operational modes can be selected for the state machine. MODE offers
all standard tuning actions as well as generic control for flexibility. The state machine
controls the tuner directly by controlling the I

C-bus data. Internal circuits like the IF

counter, mute and weak signal processing are controlled complementary to the tuner
action. The state machine operation starts at the end of transmission (P = STOP). In case
a previous action is still active this is overruled and the new action defined by MODE is
started immediately.

When only the address byte is transmitted no action is started and no setting is changed,
this can be used to test the presence of the device on the bus. To minimize the I

C-bus

transmission time only bytes that include data changes need to be written. Following the
MSA byte the transmission can start at any given data byte defined by the subaddress
(SA) bits. In case of MODE = preset, search or load the value of buffered data that is not
overwritten by the new transmission will equal the control register content, i.e. the current
tuner state. Instead in case of MODE = buffer, AF update, jump, check or end any not
overwritten BUFFER data remains to be the existing BUFFER register content, i.e. the
previous tuner state.

Table 20:

TEMP - format of data byte 6

TEMP7

TEMP6

TEMP5

TEMP4

TEMP3

TEMP2

TEMP1

TEMP0

Table 21:

TEMP - data byte 6 bit description

Bit

Symbol

Description

7 to 0

TEMP[7:0] on-chip temperature; 1 step

1 K; relative indication

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

22 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

After power-on reset all registers, including the reserved registers, should be initialized
with their default settings (see

Table 22

) using a preset mode tuning action (see

Table 25

The tuning mute circuit is muted. An action of the state machine is required to de-mute the
circuit, for this purpose preset mode (bits MODE[2:0] = 001) is best fitted since it assures
fast settling of all parameters before mute is released.

Table 22:

Write mode subaddress overview

Subaddress

Name

Default

Reference

00h

BANDWIDTH

1111 1110

Section 8.2.2

01h

PLLM

0000 1000

Section 8.2.3

02h

PLLL

0111 1110

Section 8.2.3

03h

DAA

0100 0000

Section 8.2.4

04h

AGC

0000 0000

Section 8.2.5

05h

BAND

0010 0000

Section 8.2.6

06h

LEVELALGN

1000 0100

Section 8.2.8

07h

IFCF

0010 0000

Section 8.2.9

08h

IFCAP

0000 1000

Section 8.2.10

09h

ACD

0100 1010

Section 8.2.11

0Ah

SENSE

1000 0101

Section 8.2.12

0Bh

TIMING

0110 0110

Section 8.2.13

0Ch

SNC

0111 0100

Section 8.2.14

0Dh

HIGHCUT

0110 1111

Section 8.2.15

0Eh

SOFTMUTE

0110 1010

Section 8.2.16

0Fh

RADIO

0001 1010

Section 8.2.17

10h

INPUT

0000 1010

Section 8.2.18

11h

VOLUME

0011 0000

Section 8.2.19

12h

TREBLE

0000 1100

Section 8.2.20

13h

BASS

0000 1100

Section 8.2.21

14h

FADER

0000 0000

Section 8.2.22

15h

OUTPUT

0000 1111

Section 8.2.23

16h

BALANCE

1000 0000

Section 8.2.24

17h

LOUDNESS

0000 1100

Section 8.2.25

18h

POWER

0000 0110

Section 8.2.26

19h to 1Fh

reserved

0000 0000

Section 8.2.27

TEF6904A_1

Preliminary data sheet

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27 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

8.2.1 Mode and subaddress byte for write

Fig 12. Write without state machine action, with preload and swap

byte 1

byte 2

byte 3

byte 4

byte 5

BUFFER

CONTROL

byte 0

byte 1

byte 2

byte 3

byte 4

byte 5

byte 0

new

current

address

MSA

byte 3

byte 4

byte 5

MODE = load
SA = 3

preload

001aab526

swap

Table 23:

MSA - format of mode and subaddress byte

MODE2

MODE1

MODE0

SA4

SA3

SA2

SA1

SA0

Table 24:

MSA - mode and subaddress byte bit description

Bit

Symbol

Description

7 to 5

MODE[2:0]

mode tuning action; see

Table 25

4 to 0

SA[4:0]

Subaddress; 0 0000 to 1 1111 = write data byte subaddress 00h to 1Fh.
The subaddress value is auto-incremented and will revert from
SA = 1Fh to SA = 00h. The auto-increment function cannot be disabled.

TEF6904A_1

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Philips Semiconductors

TEF6904A

Integrated car radio

Since buffer mode (bits MODE[2:0] = 000) does not change any tuner action or register
other then those defined by the I

C-bus write transmission it generally is the mode used

for writing outside the buffered subaddress range (i.e. bits SA[4:0] = 06h to 1Fh). Writing
in the subaddress range of 06h to 1Fh is executed immediately and is not controlled by
the state machine. Load mode does not interrupt a state machine process, the preload
action changes the content of the BUFFER register which may interfere with a tuner
action in progress.

When a new state machine tuning action is started during a mute state of the state
machine, the new action skips the unnecessary activation of mute and starts immediately
with the actions that follow the mute period in the standard sequence. In this way fastest
timing is possible e.g. for search tuning (see

Figure 14

Figure 16

Figure 20

and

Figure 22

). When AF update mode is started during a mute state only the return tuning

action will be performed; in combination with check mode an AF update can be created
with the AF sampling time defined by I

C-bus control (see

Figure 18

The FM IF2 signal path contains a digital controlled AGC function with a maximum AGC
decay time of 13 ms to realize sufficient AM suppression during changing signal
conditions and high modulation situations. During the settling of the AGC (e.g. after a
tuning action), the gain of the FM path and the level detection can be affected. To get
correct signal quality information, a minimum time of 13 ms should be used between two
tuning actions.

Table 25:

Tuning action modes

MODE2 MODE1 MODE0 Symbol

Description

buffer

write BUFFER register, no state machine action, no
register swap; see

Figure 9

preset

tune to new program with 60 ms mute control; swap;
see

Figure 13

and

Figure 14

; BUFFER is preloaded with

CONTROL register; immediate swap; see

Figure 11

tune to new program and stay muted (to release use
end); swap; see

Figure 15

and

Figure 16

; BUFFER is

preloaded with CONTROL register; see

Figure 11

AF update

tune to AF program; check AF quality and tune back to
main program; two register swap operations;
see

Figure 17

and

Figure 18

jump

tune to AF program in minimum time; register swap;
see

Figure 19

and

Figure 20

check

tune to AF program and stay muted (to release use end);
register swap; see

Figure 21

and

Figure 22

load

write CONTROL register via BUFFER; no state machine
action; BUFFER is preloaded with CONTROL register;
immediate swap; see

Figure 12

end

end action; release mute; no register swap; see

Figure 9

and

Figure 23

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

35 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

Table 28:

FM IF bandwidth selection

BW4

BW3

BW2

BW1

BW0

DYN = 0

DYN = 1

57 kHz

57 kHz to 165 kHz

60 kHz

60 kHz to 165 kHz

64 kHz

64 kHz to 165 kHz

67 kHz

67 kHz to 165 kHz

71 kHz

71 kHz to 165 kHz

74 kHz

74 kHz to 165 kHz

78 kHz

78 kHz to 165 kHz

81 kHz

81 kHz to 165 kHz

85 kHz

85 kHz to 165 kHz

88 kHz

88 kHz to 165 kHz

92 kHz

92 kHz to 165 kHz

95 kHz

95 kHz to 165 kHz

99 kHz

99 kHz to 165 kHz

102 kHz

102 kHz to 165 kHz

106 kHz

106 kHz to 165 kHz

109 kHz

109 kHz to 165 kHz

113 kHz

57 kHz to 113 kHz

116 kHz

57 kHz to 116 kHz

120 kHz

57 kHz to 120 kHz

123 kHz

57 kHz to 123 kHz

127 kHz

57 kHz to 127 kHz

130 kHz

57 kHz to 130 kHz

134 kHz

57 kHz to 134 kHz

137 kHz

57 kHz to 137 kHz

141 kHz

57 kHz to 141 kHz

144 kHz

57 kHz to 144 kHz

148 kHz

57 kHz to 148 kHz

151 kHz

57 kHz to 151 kHz

155 kHz

57 kHz to 155 kHz

158 kHz

57 kHz to 158 kHz

162 kHz

57 kHz to 162 kHz

165 kHz

57 kHz to 165 kHz

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

36 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

8.2.3 Write mode: data bytes PLLM and PLLL

8.2.4 Write mode: data byte DAA

Table 29:

PLLM - format of data byte 01h with default setting (buffered)

RFGAIN

PLL14

PLL13

PLL12

PLL11

PLL10

PLL9

PLL8

Table 30:

PLLL - format of data byte 02h with default setting (buffered)

PLL7

PLL6

PLL5

PLL4

PLL3

PLL2

PLL1

PLL0

Table 31:

PLLM and PLLL - data byte 01h and data byte 02h bit description

Bit

Symbol

Description

7 (PLLM)

RFGAIN

RF gain setting in FM mode

0 = standard RF gain

1 = +6 dB additional RF gain at FM mixer 1

6 to 0
(PLLM)
7 to 0
(PLLL)

PLL[14:0]

VCO programmable divider N; application range of N = 1024 to 32767;
see

Section 8.2.7

Table 32:

DAA - format of data byte 03h with default setting (buffered)

DAA6

DAA5

DAA4

DAA3

DAA2

DAA1

DAA0

Table 33:

DAA - data byte 03h bit description

Bit

Symbol

Description

reserved; 0 = normal operation

6 to 0

DAA[6:0]

RF selectivity alignment

FM: alignment of antenna circuit tuning voltage
(0.1

VCO

to 2.0

VCO

)

AM: voltage Digital-to-Analog Converter (DAC) output
(0.1

4.3 V to 2.0

4.3 V)

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

37 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

8.2.5 Write mode: data byte AGC

Table 34:

AGC - format of data byte 04h with default setting (buffered)

AGCSW

IFGAIN

AGC1

AGC0

KAGC

LODX

Table 35:

AGC - data byte 04h bit description

Bit

Symbol

Description

AGCSW

RF AGC switch

0 = no control of unused RF AGC

1 = unused AM RF AGC PIN diode at FM mode, or unused FM RF
AGC PIN diode at AM mode is supplied with a constant current for fixed
attenuation

IFGAIN

IF gain

0 = IF gain for low loss 10.7 MHz filter

1 = increased IF gain (3 dB) for high loss 10.7 MHz filter

5 and 4

reserved; 0 = normal operation

3 and 2

AGC[1:0]

setting of RF AGC threshold voltage

FM mixer 1 input voltage (RMS value)

00 = 24 mV

01 = 17 mV

10 = 12 mV

11 = 9 mV

AM mixer 1 input voltage (peak-to-peak value)

00 = 1000 mV

01 = 700 mV

10 = 500 mV

11 = 350 mV

KAGC

keyed AGC

FM mode

0 = keyed AGC off

1 = keyed AGC on; the AGC start level is shifted to a value 10 dB above
the standard AGC start level, when the level voltage of the wanted RF
signal is below the threshold level voltage for narrow-band AGC

AM mode

0 = RF cascode AGC enabled with full range

1 = RF cascode AGC enabled with limited range

LODX

FM mode: local switch

0 = standard operation (DX)

1 = forced FM RF AGC attenuation (LOCAL)

AM mode: trigger signal from AM IF noise blanker to AM audio noise
blanker

0 = trigger signal active for low modulation only (m < 0.05)

1 = trigger signal always active, independent of modulation

TEF6904A_1

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Philips Semiconductors

TEF6904A

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8.2.6 Write mode: data byte BAND

Different PLL charge pump currents are used for different reference frequencies to
maintain best PLL loop stability; see

Table 40

Settings FREF[2:0] = 000 (100 kHz) and FREF[2:0] = 001 (50 kHz) include additional high
current charge pump control to realize fast PLL locking within 1 ms.

Table 36:

BAND - format of data byte 05h with default setting (buffered)

BAND2

BAND1

BAND0

FREF2

FREF1

FREF0

LOINJ

Table 37:

BAND - data byte 05h bit description

Bit

Symbol

Description

7 to 5

BAND[2:0] FM and AM band selection; see

Table 38

4 to 2

FREF[2:0]

PLL reference frequency; see

Table 39

LOINJ

FM mixer 1 image suppression

0 = high injection image suppression

1 = low injection image suppression

reserved; 0 = normal operation

Table 38:

Decoding of BAND bits

BAND2

BAND1

BAND0

Divider ratio M

Receiver band

reserved

Table 39:

Reference frequencies

FREF2

FREF1

FREF0

ref

100 kHz

50 kHz

25 kHz

20 kHz

10 kHz

reserved

TEF6904A_1

Preliminary data sheet

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Philips Semiconductors

TEF6904A

Integrated car radio

[1]

X = don't care.

8.2.7 Tuning overview

High injection LO (Europe FM, US FM and AM):

with LOINJ = 0 to achieve full image suppression in FM.

Low injection LO (Japan FM and OIRT):

with LOINJ = 1 to achieve full image suppression in FM.

where: M is the divider ratio of the VCO frequency for AM mixer 1 and FM mixer 1

Table 40:

Charge pump source

[1]

FREF2

FREF1

FREF0

LOINJ

Charge pump
current

ref

CP1

100 kHz

CP2

50 kHz

CP3

25 kHz

CP3

20 kHz

CP4

20 kHz

CP5

10 kHz

reserved

Table 41:

Standard tuner settings

Broadcast band

BAND[2:0]

FREF[2:0]

ref

LOINJ

Tuning step

Europe FM and US FM

001

000

100 kHz

50 kHz

Japan FM

010

000

100 kHz

33.3 kHz

Eastern Europe FM
(OIRT FM)

010

011

20 kHz

6.67 kHz

AM MW and LW

111

011

20 kHz

1 kHz

AM SW 120 m to 60 m

110

100

10 kHz

0.625 kHz

AM SW 49 m to 22 m

101

100

10 kHz

1 kHz

AM SW 25 m to 15 m

100

10 kHz

1.25 kHz

AM SW 16 m to 11 m

011

100

10 kHz

1.67 kHz

10.7 MHz

(

)

ref

------------------------------------------------------

10.7 MHz

(

)

ref

------------------------------------------------------

tuning step

ref

-------

VCO

mixer 1

----------------

TEF6904A_1

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Philips Semiconductors

TEF6904A

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8.2.8 Write mode: data byte LEVELALGN

For I

C-bus reading of the level voltage and standard alignment see read data byte 1

(see

Table 10

Level alignment should begin with slope alignment (LSL): the level slope does not change
with level start alignment (LST) or broadcast band; therefore a single LSL alignment
setting can be used for all FM and AM band selections.

Level start may change between broadcast bands; therefore generally a separate LST
alignment and setting is used for every broadcast band.

8.2.9 Write mode: data byte IFCF

Table 42:

LEVELALGN - format of data byte 06h with default setting

LST4

LST3

LST2

LST1

LST0

LSL2

LSL1

LSL0

Table 43:

LEVELALGN - data byte 06h bit description

Bit

Symbol

Description

7 to 3

LST[4:0]

level start voltage alignment

2 to 0

LSL[2:0]

level slope alignment

Table 44:

IFCF - format of data byte 07h with default setting

IFCFA

IFNBW

IFCF5

IFCF4

IFCF3

IFCF2

IFCF1

IFCF0

Table 45:

IFCF - data byte 07 bit description

Bit

Symbol

Description

IFCFA

FM IF filter align mode

0 = normal operation

1 = align mode (fast frequency settling)

IFNBW

FM IF filter narrow

0 = normal operation

1 = FM IF filter at minimum bandwidth (57 kHz)

5 to 0

IFCF[5:0]

FM IF filter center frequency alignment

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Philips Semiconductors

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8.2.10 Write mode: data byte IFCAP

The fully integrated IF2 filter of the TEF6904A has to be aligned in order to achieve the
optimum performance at all ambient conditions.

8.2.10.1

Factory alignment of bits IFCAP[3:0]

FM IF filter operation point alignment: data byte IFCAP: a single alignment of the FM IF
filter operation range secures an accurate and continuous frequency setting over the full
temperature range and all FM bands.

1. Set bit IFCAPA to logic 1 to disable internal IFCAP control

2. Decrease IFCAP from 15 downwards until I

C-bus read bit IFCAPG (read byte 5; ID)

changes from logic 1 to logic 0

3. Save this IFCAP setting as alignment value

4. Set bit IFCAPA to logic 0 to return to normal operation

8.2.10.2

Initialization of the radio

During radio initialization bit IFCAPA (is logic 1) is used for writing the stored IFCAP[3:0]
value. Afterwards set bit IFCAPA to a logic 0 to start normal operation. Writing of the
IFCAP byte with the alignment value is allowed during radio operation but requires a
setting of bit IFCAPA to logic 0.

8.2.10.3

Factory alignment of IFCF

FM IF filter center frequency alignment: data byte IFCF: to correct IF frequency errors
caused by an error in the crystal frequency the alignment is preferably performed for every
FM band in use. A test frequency in the center of the band is preferred. An accurate
alignment result is realized by testing for symmetrical filter attenuation.

1. Set RF generator level V

= 200

2. Set bit IFCFA to logic 1 to enable fast settling of the filter frequency

3. Set bit IFNBW to logic 1 for accuracy (filter is set to narrow 57 kHz bandwidth)

4. Test high side of filter curve: tune to f

50 kHz (Europe/USA) or f

+ 33.3 kHz

(Japan/OIRT)

Table 46:

IFCAP - format of data byte 08h with default setting

IFCAPA

IFCAP3

IFCAP2

IFCAP1

IFCAP0

Table 47:

IFCAP - data byte 08h bit description

Bit

Symbol

Description

IFCAPA

FM IF filter capacitor align

0 = standard operation

1 = align mode and initialization mode (auto correct disabled)

6 to 4

reserved; 0 = normal operation

3 to 0

IFCAP[3:0]

IF filter capacitor. Setting of FM IF filter capacitor value by means of
bit IFCAPG of read data byte 5, ID; see

Table 19

(For initialization set

IFCAPA = 1. For alignment set IFCAPA = 1 and check, when read bit
IFCAPG changes from logic 0 to logic 1).

TEF6904A_1

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5. Change IFCF from 0 to 63 and note the level read result (level voltages)

6. Test low side of filter curve: tune to f

+ 50 kHz (Europe/USA) or f

33.3 kHz

(Japan/OIRT)

7. Change IFCF from 0 to 63 and note the level voltages

8. Find the IFCF value where both level curves cross (lowest difference) and save this

IFCF value

9. Set bits IFCFA and IFNBW to logic 0 to return to normal operation

The bits IFCFA and IFNBW are intended for factory alignment use only. Normal radio
operation requires a setting of bits IFCFA and IFNBW to logic 0.

8.2.11 Write mode: data byte ACD

Table 48:

ACD - format of data byte 09h with default setting

ACDLEV

ACDLAP1

ACDLAP0

ACDBAL1

ACDBAL0

ACDWAM1

ACDWAM0

HCSFH

Table 49:

ACD - data byte 09h bit description

Bit

Symbol

Description

ACDLEV

level threshold; start level of threshold extension and latch protection

0 = start at LEV = 40 (V

LEVEL

= 0.88 V), normal operation

1 = start at LEV = 48 (V

LEVEL

= 1 V)

6 and 5

ACDLAP[1:0]

latch protection limit; protect against narrow bandwidth locking at high
modulation, low RF signal condition

00 = no protection

01 = low protection

10 = standard protection

11 = high protection

4 and 3

ACDBAL[1:0]

control balance; bandwidth control priority towards adjacent channel
(prevent breakthrough) or towards modulation (low distortion)

00 = high adjacent channel priority

01 = medium adjacent channel priority, standard operation

10 = medium modulation priority

11 = high modulation priority

2 and 1

ACDWAM[1:0] WAM threshold; desensitize bandwidth control at detection of WAM

00 = no desensitization on WAM

01 = low sensitivity; 40 %

10 = medium sensitivity; 30 %

11 = high sensitivity; 20 %

HCSFH

HCC minimum bandwidth; combined control with bit HCSF;
see

Table 57

Table 60

and

Figure 26

0 = minimum bandwidth of high cut control is 2.2 kHz or 3.3 kHz

1 = minimum bandwidth of high cut control is 3.9 kHz or 5.6 kHz

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

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Philips Semiconductors

TEF6904A

Integrated car radio

8.2.12 Write mode: data byte SENSE

The input control value for weak signal control derived from USN is denoted by V

eq.LEVEL

;

equivalent level voltage. This indicates a weak signal control amount equal to the weak
signal control generated by a certain V

LEVEL

voltage.

The USS setting does not influence the I

C-bus read quality information of USN; read

data byte 2, USN/WAM; see

Table 12

The input control value for weak signal control derived from WAM is denoted by V

eq.LEVEL

;

equivalent level voltage. This indicates a weak signal control amount equal to the weak
signal control generated by a certain V

LEVEL

voltage.

The WAS setting does not influence the I

C-bus read quality information of WAM; read

data byte 2, USN/WAM; see

Table 12

Table 50:

SENSE - format of data byte 0Ah with default setting

CSA3

CSA2

CSA1

CSA0

USS1

USS0

WAS1

WAS0

Table 51:

SENSE - data byte 0Ah bit description

Bit

Symbol

Description

7 to 4

CSA[3:0]

alignment of FM stereo channel separation

3 and 2

USS[1:0]

USN sensitivity; USN weak signal control equivalent level
voltage/frequency deviation for weak signal processing; see

Figure 24

00 =

0.06 V/kHz

01 =

0.08 V/kHz

10 =

0.12 V/kHz

11 =

0.16 V/kHz

1 and 0

WAS[1:0]

WAM sensitivity; WAM weak signal control equivalent level
voltage/V

LEVEL

(peak-to-peak) for weak signal processing; see

Figure 24

00 =

7.5

01 =

10 =

11 =

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8.2.13 Write mode: data byte TIMING

[1]

During the tuning mute of the preset and search mode tuning action the time constants set by STC, HTC and MTC change to
t

attack

= 50 ms and t

recovery

= 50 ms to enable fast settling of the weak signal processing to new conditions.

a. MPX signal.

b. Level variation.

Fig 24. Weak signal control sensitivity versus MPX signal at 150 kHz (USN) and level variation at 21 kHz (WAM)

001aab831

f (kHz)

C-bus:

USN =

eq. LEVEL

(V)

USS[1:0]

001aab538

LEVEL

(V)

0.6

0.4

0.2

eq. LEVEL

(V)

WAS[1:0]

C-bus:

WAM =

Table 52:

TIMING - format of data byte 0Bh with default setting

STC1

STC0

HTC2

HTC1

HTC0

MTC2

MTC1

MTC0

Table 53:

TIMING - data byte 0Bh bit description

[1]

Bit

Symbol

Description

7 and 6

STC[1:0]

setting of the stereo noise control time constants; see

Table 54

5 to 3

HTC[2:0]

setting of the high cut control time constants; see

Table 55

2 to 0

MTC[2:0]

setting of the soft mute control time constants; see

Table 56

Table 54:

SNC weak signal processing control speed setting

STC1

STC0

attack

recovery

0.1 s

1.25 s

0.1 s

2.5 s

0.1 s

5 s

0.1 s

10 s

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

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Philips Semiconductors

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[1]

When for an external audio source VU-meter mode is enabled (bits AVUM or COMP are logic 1) the HTC
setting controls the t

recovery

VU-meter timing, t

attack

has a fixed value of 20 ms; see

Table 100

[1]

When for an external audio source dynamic compression is enabled (bit COMP is logic 1) the MTC setting
controls the t

recovery

compression timing, t

attack

has a fixed value of 20 ms; see

Table 80

[2]

The attack time is the time, which the weak signal processing needs to realize a full control change for a
level voltage change between HIGH level (where the weak signal processing is inactive) and 0.75 V level
voltage.

[3]

The recovery time is the time needed for the full control change when the level voltage rises from 0.75 V to
HIGH level.

Table 55:

HCC speed setting

[1]

HTC2

HTC1

HTC0

attack

recovery

0.03 s

0.04 s

0.03 s

0.08 s

0.06 s

0.3 s

0.25 s

0.3 s

0.25 s

0.6 s

0.5 s

0.6 s

1 s

1.25 s

1 s

2.5 s

Table 56:

Soft mute weak signal processing control speed setting

[1]

MTC2

MTC1

MTC0

attack

[2]

recovery

[3]

0.01 s

0.03 s

0.1 s

0.2 s

0.4 s

0.8 s

TEF6904A_1

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Rev. 01 -- 3 February 2006

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Philips Semiconductors

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8.2.14 Write mode: data byte SNC

Table 57:

SNC - format of data byte 0Ch with default setting

SST3

SST2

SST1

SST0

SSL1

SSL0

HCMP

HCSF

Table 58:

SNC - data byte 0Ch bit description

Bit

Symbol

Description

7 to 4

SST[3:0]

SNC start; start setting of the stereo noise control; see

Table 59

and

Figure 25

3 and 2

SSL[1:0]

SNC slope; slope setting of the stereo noise control (

sep

eq.LEVEL

);

see

Figure 25

00 = 38 dB/V

01 = 51 dB/V

10 = 63 dB/V

11 = 72 dB/V

HCMP

HCC control source

0 = high cut control is only controlled by the level information

1 = high cut control is controlled by level, USN and WAM

HCSF

HCC minimum bandwidth; combined control with bit HCSFH;
see

Table 49

Table 60

and

Figure 26

Table 59:

Start of stereo noise control weak signal processing

SST3

SST2

SST1

SST0

Stereo noise control start (V

eq.LEVEL

)

1.88 V

1.94 V

2.00 V

2.06 V

2.13 V

2.19 V

2.25 V

2.31 V

2.38 V

2.44 V

2.5 V

2.56 V

2.63 V

2.69 V

2.75 V

2.81 V

TEF6904A_1

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Rev. 01 -- 3 February 2006

47 of 108

Philips Semiconductors

TEF6904A

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8.2.15 Write mode: data byte HIGHCUT

Table 60:

HCC minimum bandwidth

HCSFH

HCSF

High cut control minimum bandwidth

2.2 kHz

3.3 kHz

3.9 kHz

5.6 kHz

SSL = 63 dB/V.

SST = 2.5 V.

a. Start.

b. Slope.

Fig 25. Stereo Noise Control (SNC) start and slope settings versus equivalent level voltage; SNC detector (level,

USN and WAM), USN detector and WAM detector

eq. LEVEL

(V)

0.5

2.5

1.5

001aab493

(dB)

0000

0111

1000

1111

SST[3:0]

eq. LEVEL

(V)

0.5

2.5

1.5

001aab539

(dB)

10
11

SSL[1:0]

Table 61:

HIGHCUT - format of data byte 0Dh with default setting

HST2

HST1

HST0

HSL1

HSL0

HCF2

HCF1

HCF0

Table 62:

HIGHCUT - data byte 0Dh bit description

Bit

Symbol

Description

7 to 5

HST[2:0]

HCC start; start setting of the high cut control; see

Table 63

and

Figure 26

4 and 3

HSL[1:0]

HCC slope; slope setting of the high cut control (

10 kHz

eq.LEVEL

); see

Figure 26

00 = 9 dB/V

01 = 11 dB/V

10 = 14 dB/V

11 = 18 dB/V

2 to 0

HCF[2:0]

HCC maximum bandwidth; setting of the fixed high cut control; see

Table 64

Figure 26

and

Figure 27

TEF6904A_1

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Philips Semiconductors

TEF6904A

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8.2.16 Write mode: data byte SOFTMUTE

[1]

When for an external audio source dynamic compression is enabled (bit COMP is logic 1) the MSL setting
controls the compression ratio. For default 2 : 1 compression MSL = 01 is used; see

Table 82

[1]

When for an external audio source dynamic compression is enabled (COMP = 1) the MST setting controls
the compression range. For default full compression MST = 7 is used; see

Table 81

Table 65:

SOFTMUTE - format of data byte 0Eh with default setting

MST2

MST1

MST0

MSL1

MSL0

UMD1

UMD0

MSLE

Table 66:

SOFTMUTE - data byte 0Eh bit description

Bit

Symbol

Description

7 to 5

MST[2:0]

soft mute start; start setting of the soft mute; for FM see

Table 67

and

Figure 28

; for AM see

Table 68

and

Figure 29

4 and 3

MSL[1:0]

soft mute slope

[1]

; slope setting of the soft mute (

10 kHz

eq.LEVEL

); for

FM see

Table 69

and

Figure 28

; for AM see

Table 70

and

Figure 29

2 and 1

UMD[1:0]

USN soft mute depth; setting of the maximum attenuation of the USN fast
soft mute control; see

Figure 30

00 = 3 dB

01 = 6 dB

10 = 9 dB

11 = 12 dB

MSLE

soft mute slope extension; additional slope setting of the soft mute; for
FM see

Table 69

and

Figure 28

; for AM see

Table 70

and

Figure 29

Table 67:

Start of soft mute control weak signal processing; FM mode

[1]

MST2

MST1

MST0

Soft mute control start (V

eq.LEVEL

)

0.88 V

1.0 V

1.12 V

1.25 V

1.38 V

0.75 V

0.81 V

0.94 V

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

51 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

[1]

When for an external audio source dynamic compression is enabled (COMP = 1) the MST setting controls
the compression range. For default full compression MST = 7 is used; see

Table 81

[1]

When for an external audio source dynamic compression is enabled (COMP = 1) the MSL setting controls
the compression range. For default 2 : 1 compression MSL = 1 is used; see

Table 82

[1]

When for an external audio source dynamic compression is enabled (COMP = 1) the MSL setting controls
the compression range. For default 2 : 1 compression MSL = 1 is used; see

Table 82

Table 68:

Start of soft mute control weak signal processing; AM mode

[1]

MST2

MST1

MST0

Soft mute control start (V

eq.LEVEL

)

1.5 V

1.75 V

2.0 V

1.25 V

1.38 V

1.62 V

1.88 V

2.12 V

Table 69:

Slope of soft mute control weak signal processing; FM mode

[1]

MSLE

MSL1

MSL0

Soft mute control slope (

eq.LEVEL

)

8 dB/V

16 dB/V

24 dB/V

32 dB/V

40 dB/V

48 dB/V

reserved

Table 70:

Slope of soft mute control weak signal processing; AM mode

[1]

MSL1

MSL0

MSLE

Soft mute control slope (

eq.LEVEL

)

8 dB/V

12 dB/V

16 dB/V

20 dB/V

24 dB/V

28 dB/V

32 dB/V

36 dB/V

TEF6904A_1

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Philips Semiconductors

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Integrated car radio

8.2.17 Write mode: data byte RADIO

Table 71:

RADIO - format of data byte 0Fh with default setting

MONO

DEMP

NBS1

NBS0

NBL1

NBL0

Table 72:

RADIO - data byte 0Fh bit description

Bit

Symbol

Description

reserved; 0 = normal operation

MONO

FM forced mono; stereo decoder disable option

0 = stereo decoder is set to FM stereo

1 = stereo decoder is set to FM mono

DEMP

de-emphasis; selection of the de-emphasis time constant; see

Figure 31

0 = de-emphasis is 75

1 = de-emphasis is 50

reserved; 1 = normal operation

3 and 2

NBS[1:0]

noise blanker audio sensitivity

FM audio noise blanker sensitivity setting of FM MPX ignition noise
detector (peak value of noise pulse at MPX signal)

00 = 65 mV (high sensitivity)

01 = 100 mV

10 = 125 mV

11 = 160 mV (low sensitivity)

AM audio noise blanker sensitivity setting of audio ignition noise detector
(trigger slew rate of MPX signal)

00 = 16.5 V/ms (high sensitivity)

01 = 18.6 V/ms

10 = 21 V/ms

11 = 23.5 V/ms (low sensitivity)

1 and 0

NBL[1:0]

noise blanker IF or level sensitivity

FM audio noise blanker sensitivity setting of FM level ignition noise
detector (peak value of noise pulse at level voltage)

00 = 10 mV (high sensitivity)

01 = 25 mV

10 = 36 mV

11 = 50 mV (low sensitivity)

AM IF noise blanker sensitivity setting of IF ignition noise detector (peak
voltage of noise pulse at RF dummy aerial input)

00 = 1.4 V (low sensitivity)

01 = 1.0 V

10 = 0.7 V (high sensitivity)

11 = AM IF noise blanker disabled

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

56 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

[1]

The input gain setting ING and the volume setting VOL define the overall volume. The overall range is
limited to

83 dB to +26 dB. For overall values > +28 dB the actual gain is +28 dB. For overall values

83 dB the circuit is muted.

Table 75:

Input select

INP3

INP2

INP1

INP0

Audio source for tone/volume processing

radio

stereo with CMR (INAL, INAR and INAC)

stereo (INBL and INBR)

mono symmetrical or mono with CMR (INC and IND)

stereo (INC and IND)

mono (INC)

mono (IND)

stereo with CMR (INBL, INBR and INC)

stereo symmetrical (INBL, INBR, INC and IND)

stereo (INAL and INAR)

mono (INAC)

stereo symmetrical (INAL, INAR, INAC and INAD)

stereo (INAC and INAD)

stereo with CMR (INBL, INBR and INAD)

mono (INAD)

reserved

Table 76:

Input gain setting

ING3

ING2

ING1

ING0

Input gain control

10 dB

[1]

8 dB

6 dB

4 dB

2 dB

0 dB

2 dB

4 dB

6 dB

8 dB

10 dB

[1]

12 dB

[1]

14 dB

[1]

16 dB

[1]

18 dB

[1]

mute

TEF6904A_1

Preliminary data sheet

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57 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

[1]

, L

and R

indicate inverted polarity of audio signal.

8.2.19 Write mode: data byte VOLUME

[1]

Dynamic compression can be used with external sources only. When dynamic compression is active, the radio quality detection of USN,
MOD and OFFS is limited to AF update tuning only. For dynamic compression the bits MOD[4:0] indicate the external source input
amplitude as in the VU-meter mode; AVUM; data byte 17h (see

Table 98

). The FM dynamic bandwidth control is disabled and a fixed

bandwidth of 113 kHz is defined. However, other fixed bandwidth settings are available by DYN = 0 and the setting of BW; data byte 0h
(see

Table 28

). The compression recovery timing is controlled by data byte 0Bh; TIMING (see

Table 80

). Compression start and slope

are controlled by data byte 0Eh; SOFTMUTE (see

Table 81

and

Table 82

). Standard compression requires a setting of MST = 7 and

MSL = 1.

Table 77:

Input select pin use and suggested combinations of input sources

[1]

INP

Input pin use

Audio
source

Source combinations

0000

radio

x x x x x x x x x x x x x x x x

0001 L

GND

stereo CMR

x x x x x x

0010

stereo

x x x

x x x x x

0011

M+

mono
symmetrical

0100

stereo

0101

mono

0110

mono

x x

0111

GND

stereo CMR

1000

L+

R+

stereo
symmetrical

1001 L

stereo

x x x x x

1010

mono

x x

1011 L+

R+

mono
symmetrical

x x x x x

1100

stereo

x x x

1101

GND L

stereo CMR

x x

1110

mono

x x x x

x x

Table 78:

VOLUME - format of data byte 11h with default setting

COMP

VOL6

VOL5

VOL4

VOL3

VOL2

VOL1

VOL0

Table 79:

VOLUME - data byte 11h bit description

Bit

Symbol

Description

COMP

dynamic compression

[1]

; see

Figure 34

0 = compression is disabled (standard use)

1 = dynamic compression is enabled

6 to 0

VOL[6:0]

volume setting (see

Table 83

); for balance control see data byte 16h (see

Table 95

), for

loudness control see data byte 17h (see

Table 98

)

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

58 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

[1]

Setting MTC is also in use for setting the timing of weak signal soft mute control during radio operation.

[1]

Setting MST is also in use for setting the start of weak signal soft mute control during radio operation.

[1]

Setting MSL is also in use for setting the slope of weak signal soft mute control during radio operation.

Table 80:

Dynamic compression timing; MTC[2:0] of data byte 0Bh; TIMING

[1]

MTC2

MTC1

MTC0

attack

recovery

0.02 s

0.03 s

0.02 s

0.06 s

0.02 s

0.2 s

0.02 s

5 s

0.02 s

0.6 s

0.02 s

10 s

0.02 s

1 s

0.02 s

2 s

Table 81:

Dynamic compression start; MST[2:0] of data byte 0Eh; SOFTMUTE

[1]

MST2

MST1

MST0

Compression range

reserved

start = 4 dBV; 2 : 1 range = 2 dB

start =

4 dBV; 2 : 1 range = 6 dB

start =

12 dBV; 2 : 1 range = 10 dB

start =

20 dBV; 2 : 1 range = 14 dB

start =

34 dBV; full range (2 : 1 = 18 dB)

Table 82:

Dynamic compression slope; MSL[1:0] of data byte 0Eh; SOFTMUTE

[1]

MSL1

MSL0

Compression ratio

4 : 3; full range = 9 dB

standard compression (2 : 1); full range = 18 dB

4 : 1; full range = 27 dB

limiting; full range = 36 dB

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

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Philips Semiconductors

TEF6904A

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1 V = 0 dBV.

Dynamic compression is realized by attenuation of the volume setting. To match the audio
amplitudes with and without compression a higher volume (VOL) setting should be selected
when compression is activated. The VOL correction value used defines the positioning of the
compression characteristic high signal attenuation and low signal amplification.

In this example: COMP = 0: VOL = `user volume'; COMP = 1: VOL = `user volume' + 15.

Fig 34. Example of input to output compression

Table 83:

Volume setting

VOL6

VOL5

VOL4

VOL3

VOL2

VOL1

VOL0

Volume (dB)

[1]

line input (dBV)

001aab549

line output

(dBV)

15 dB

COMP = 1;

VOL =

5 dB

COMP = 0;

VOL =

20 dB

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

61 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

Table 83:

Volume setting

...continued

VOL6

VOL5

VOL4

VOL3

VOL2

VOL1

VOL0

Volume (dB)

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

62 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

[2]

Table 83:

Volume setting

...continued

VOL6

VOL5

VOL4

VOL3

VOL2

VOL1

VOL0

Volume (dB)

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

63 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

[1]

The overall gain is the sum of the input gain setting ING[3:0] and the volume setting VOL[6:0].

The overall gain has a range of +28 dB to

83 dB.

For ING + VOL > 28 dB the overall gain is 28 dB.

For ING + VOL <

83 dB the mute is active.

[2]

For overall gain values below

75 dB (ING + VOL <

75 dB) the gain steps have a monotonous sequence.

The values of gain set error, gain step error and gain tracking error are not specified. The minimum gain
value is determined by the mute value.

[1] [2]

mute

Table 83:

Volume setting

...continued

VOL6

VOL5

VOL4

VOL3

VOL2

VOL1

VOL0

Volume (dB)

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

64 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

8.2.20 Write mode: data byte TREBLE

Table 84:

TREBLE - format of data byte 12h with default setting

TRE2

TRE1

TRE0

TREM

TRF1

TRF0

Table 85:

TREBLE - data byte 12h bit description

Bit

Symbol

Description

reserved; 0 = normal operation

6 to 4

TRE[2:0]

treble setting; treble amplification or gain setting; see

Table 86

and

Figure 35

TREM

treble control mode; treble control of attenuation or gain; see

Table 86

0 = treble mode is set to attenuation

1 = treble mode is set to gain

2 and 1

TRF[1:0]

treble frequency

00 = 8 kHz

01 = 10 kHz

10 = 12 kHz

11 = 15 kHz

reserved; 0 = normal operation

Table 86:

Treble control setting

TRE2

TRE1

TRE0

Treble control

TREM = 0

0 dB

2 dB

4 dB

6 dB

8 dB

10 dB

12 dB

14 dB

TREM = 1

0 dB

2 dB

4 dB

6 dB

8 dB

10 dB

12 dB

14 dB

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

68 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

8.2.23 Write mode: data byte OUTPUT

[1]

Output gain (OUTA) and output mute (MUxx) control is active for all signal selections. Fader control (FADM,
FAD) is active for every signal selection except for the internal audio of `external I/O rear only' mode at the
front output.

The internal audio signal is available on output pins PLOUT and PROUT independent of the EXP bit
setting.

The output level on pins PLOUT and PROUT as well as the input level for pins INPL and INPR is 1 V for the
maximum line output level of 1.4 V (OUTA = 0) or 2 V (OUTA = 1).

Table 92:

OUTPUT - format of data byte 15h with default setting

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

EXP1

EXP0

EXPS

OUTA

MULF

MURF

MULR

MURR

Table 93:

OUTPUT - data byte 15h bit description

[1]

Bit

Symbol

Description

7 and 6

EXP[1:0]

external processor selection; enable I/O between tone and fader; see

Table 94

and

Figure 37

EXPS

output selector for external processor; see

Figure 37

0 = output signal from TREBLE output

1 = output signal from source selector output

OUTA

output gain

0 = standard output gain

1 = output gain is 3 dB

MULF

left front output mute

0 = output LFOUT is enabled

1 = output LFOUT is muted

MURF

right front output mute

0 = output RFOUT is enabled

1 = output RFOUT is muted

MULR

left rear output mute

0 = output LROUT is enabled

1 = output LROUT is muted

MURR

right rear output mute

0 = output RROUT is enabled

1 = output RROUT is muted

Table 94:

External processor selection

EXP1

EXP0

External I/O mode

Front output

Rear output

internal

internal audio

external input into tone/volume
part

external signal via
tone/volume part

external input into fader part

external signal

external input into fader part,
rear only

internal signal at
PLOUT/PROUT

external signal

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

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Philips Semiconductors

TEF6904A

Integrated car radio

8.2.24 Write mode: data byte BALANCE

[1]

The maximum obtainable attenuation of volume and balance is limited to

83 dB. For VOL + BAL attenuation settings below

83 dB;

mute is activated.

Fig 37. External processor connections

001aab552

INPUT GAIN,

VOLUME,

BALANCE,

MUTE

INPUT

SELECT

FRONT/REAR

FADER

BASS,

TREBLE,

LOUDNESS

LROUT
RROUT

INPL
INPR
1 V

INPUT
2 V

6 dB

3 dB

(

6 dB)

EXP

EXPS

EXP

LFOUT
RFOUT
1.4 V
(2 V)

PLOUT
PROUT
1 V

Table 95:

BALANCE - format of data byte 16h with default setting

BALM

BAL6

BAL5

BAL4

BAL3

BAL2

BAL1

BAL0

Table 96:

BALANCE - data byte 16h bit description

Bit

Symbol

Description

BALM

balance control mode; sets the balance mode to left or right attenuation

0 = left channel is attenuated

1 = right channel is attenuated

6 to 0

BAL[6:0]

balance setting; see

Table 97

Table 97:

Balance attenuation setting

[1]

BAL6

BAL5

BAL4

BAL3

BAL2

BAL1

BAL0

Balance (dB)

110

111

mute

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

70 of 108

Philips Semiconductors

TEF6904A

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8.2.25 Write mode: data byte LOUDNESS

[1]

The VU-meter mode can be used with external sources only. When the VU-meter mode is active, the radio
quality detection of USN, MOD and OFFS is limited to AF update tuning only. During VU-meter mode the
bits MOD[4:0] indicate the external source input amplitude. The FM dynamic bandwidth control is disabled
and a fixed bandwidth of 113 kHz is defined. However, other fixed bandwidth settings are available by
DYN = 0 and the setting of BW; data byte 0h (see

Table 28

). See

Table 100

for compression recovery timing

control. VU-meter mode is automatically activated when audio compression is on (COMP = 1).

[1]

Setting HTC[2:0] is also in use for setting the timing of weak signal high cut control during radio operation.

Table 98:

LOUDNESS - format of data byte 17h with default setting

AVUM

ASFD

LDON

LDHB

LDS2

LDS1

LDS0

Table 99:

LOUDNESS - data byte 17h bit description

Bit

Symbol

Description

AVUM

audio VU-meter mode

[1]

0 = MOD read information indicates the modulation of the radio
channel

1 and an external input source is selected = MOD read information will
indicate the input amplitude of the selected source

ASFD

ASI filter disable

0 = normal operation

1 = no low-pass filter inserted during ASI

reserved; 0 = normal operation

LDON

loudness on

0 = loudness control is disabled

1 = loudness control is active; loudness is controlled by the volume
setting

LDHB

loudness high boost; see

Figure 38

0 = loudness control is limited to bass gain

1 = loudness controls bass gain and treble gain

2 to 0

LDS[2:0]

loudness start setting; loudness start defines the volume setting below
which loudness control is activated; see

Table 101

and

Figure 38

Table 100: VU-meter timing; HTC[2:0] of data byte 0Bh; TIMING

[1]

HTC2

HTC1

HTC0

attack

recovery

0.02 s

0.03 s

0.02 s

0.06 s

0.02 s

0.2 s

0.02 s

5 s

0.02 s

0.6 s

0.02 s

10 s

0.02 s

1 s

0.02 s

2 s

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

72 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

8.2.26 Write mode: data byte POWER

[1]

The power saving offered by the Standby modes is limited and is not intended to realize an effective
power-down.

8.2.27 Write mode: data bytes RESERVED

[1]

Reserved bits may control test options for factory testing.

Table 102: POWER - format of data byte 18h with default setting

STBT

ASC1

ASC0

ASI

AST1

AST0

Table 103: POWER - data byte 18h bit description

[1]

Bit

Symbol

Description

reserved; 0 = normal operation

STBT

standby tuner

0 = normal operation

1 = power consumption is reduced by disabling part of the tuner circuit;
radio operation is disabled

reserved; 0 = normal operation

4 and 3

ASC[1:0]

ASI clock frequency

00 = 10 MHz

01 = 5 MHz

10 = 2.5 MHz

11 = 1.3 MHz

ASI

audio step interpolation

0 = audio step interpolation is disabled

1 = audio step interpolation is enabled

1 and 0

AST[1:0]

ASI step time; selection of the audio step interpolation time

00 = 1 ms

01 = 3 ms

10 = 10 ms

11 = 30 ms

Table 104: RESERVED - format of data byte 19h to 1Fh

Table 105: RESERVED - data byte 19h to 1Fh bit description

[1]

Bit

Symbol

Description

7 to 0

reserved; 0 = normal operation

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

73 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

Limiting values

[1]

The maximum voltage should be less than 10 V.

[2]

Class 2 according to JESD22-A114-B.

[3]

Class B according to EIA/JESD22-A115-A.

[4]

Class 1C according to JESD22-A114-B.

[5]

Class A according to EIA/JESD22-A115-A.

10. Thermal characteristics

Table 106: Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134).

Symbol

Parameter

Conditions

Min

Max

Unit

analog supply voltage on pins VCC,
VCCPLL, VCCVCO, VCCRF,
AMMIX2OUT1, AMMIX2OUT2, MIX1OUT1
and MIX1OUT2

0.3

+10

voltage difference between any VCC pins

0.3

+0.3

V60

supply voltage for FM filter and
demodulator

[1]

0.3

+ 0.3

digital input voltage on pins SCL, SDA and
ADDR

0.3

+5.5

voltage on all other pins

[1]

0.3

+ 0.3

stg

storage temperature

+150

junction temperature

+150

amb

ambient temperature

+85

esd

electrostatic discharge voltage on

all pins except VCCVCO

human body model

[2]

2000

+2000

machine model

[3]

200

+200

pin VCCVCO

human body model

[4]

1750

+1750

machine model

[5]

175

+175

Table 107: Thermal characteristics

Symbol

Parameter

Conditions

Typ

Unit

th(j-a)

thermal resistance from junction to ambient in free air

K/W

th(j-c)

thermal resistance from junction to case

K/W

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

74 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

11. Static characteristics

Table 108: Static characteristics

= 8.5 V; T

amb

= 25

C; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Supply voltage

analog supply voltage on pins VCC,
VCCPLL, VCCVCO, VCCRF,
AMMIX2OUT1, AMMIX2OUT2,
MIX1OUT1 and MIX1OUT2

8.5

V60

supply voltage for FM filter and
demodulator

5.5

7.2

Current in FM mode

supply current

amb

= 25

amb

= 85

CCPLL

supply current for tuning PLL

amb

4.0

amb

= 25

2.9

3.6

amb

= 85

3.3

CCVCO

supply current for VCO

amb

2.2

amb

= 25

2.1

amb

= 85

2.0

CCRF

supply current for RF

amb

= 25

10.5

13.5

16.5

amb

= 85

18.5

V60

supply current for FM filter and
demodulator

amb

= 25

amb

= 85

MIX1OUT1

;

MIX1OUT2

bias current of FM and AM mixer 1 at
output 1 or output 2

amb

5.3

amb

= 25

4.3

5.7

7.5

amb

= 85

6.0

8.0

Current in AM mode

supply current

amb

= 25

amb

= 85

CCPLL

supply current for tuning PLL

amb

3.9

amb

= 25

2.9

3.6

amb

= 85

3.2

CCVCO

supply current for VCO

amb

2.2

amb

= 25

2.1

amb

= 85

2.0

CCRF

supply current for RF

amb

8.8

amb

= 25

6.7

8.8

amb

= 85

8.8

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

75 of 108

Philips Semiconductors

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Integrated car radio

12. Dynamic characteristics

12.1 Dynamic characteristics of the tuner

V60

supply current for FM filter and
demodulator

amb

8.0

amb

= 25

7.8

10.2

amb

= 85

7.5

MIX1OUT1

;

MIX1OUT2

bias current of FM and AM mixer 1 at
output 1 or output 2

amb

3.6

amb

= 25

2.6

3.45

4.5

amb

= 85

3.3

AMMIX2OUT1

;

AMMIX2OUT2

bias current of AM mixer 2 at output 1
or output 2

amb

5.5

amb

= 25

3.7

4.6

5.5

amb

= 85

3.7

Logic: pin ADDR

HIGH-level input voltage

1.75

5.5

LOW-level input voltage

0.2

+1.0

Power-on reset; all registers in default setting, outputs muted, Standby mode

th(POR)

threshold value of V

for power-on

reset

drop during

operation

amb

6.8

amb

= 25

6.15

6.3

6.45

amb

= 85

5.8

Table 108: Static characteristics

...continued

= 8.5 V; T

amb

= 25

C; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 109: Dynamic characteristics of the tuner

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Crystal oscillator

xtal

crystal frequency

20.5

MHz

C/N

carrier-to-noise ratio

xtal

= 20.5 MHz;

f = 10 kHz

112

Circuit inputs: pins XTAL1 and XTAL2

o(osc)(rms)

oscillator output voltage
(RMS value)

[1]

100

160

real part of input
impedance

XTAL1-XTAL2

= 1 mV

[1]

500

250

input capacitance

[1]

Tuning system; see

Table 38

Table 39

and

Table 41

Voltage controlled oscillator

osc(min)

minimum oscillator
frequency

153.6

MHz

osc(max)

maximum oscillator
frequency

256

MHz

dBc

-----------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

76 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

C/N

carrier-to-noise ratio

osc

= 200 MHz;

f = 10 kHz;

ripple rejection;

ripple

= 100 Hz;

CC(ripple)

= 50 mV (RMS);

osc

= 200 MHz; FM mode

Charge pump: pin CPOUT; see

Table 40

sink(CP1)

charge pump CP1 sink
current

CPOUT

= 0.5 V to

CCPLL

1.3 V; f

ref

= 100 kHz

130

180

240

source(CP1)

charge pump CP1
source current

CPOUT

= 0.5 V to

CCPLL

1.3 V; f

ref

= 100 kHz

240

180

130

sink(CP2)

charge pump CP2 sink
current

CPOUT

= 0.7 V to

CCPLL

1.5 V; f

ref

= 50 kHz

270

360

480

source(CP2)

charge pump CP2
source current

CPOUT

= 0.7 V to

CCPLL

1.5 V; f

ref

= 50 kHz

480

360

270

sink(CP3)

charge pump CP3 sink
current

CPOUT

= 0.7 V to

CCPLL

0.7 V;

ref

= 20 kHz or 25 kHz

580

780

1050

source(CP3)

charge pump CP3
source current

CPOUT

= 0.7 V to

CCPLL

0.7 V;

ref

= 20 kHz or 25 kHz

1050

780

580

sink(CP4)

charge pump CP4 sink
current

CPOUT

= 0.7 V to

CCPLL

0.7 V; f

ref

= 20 kHz

1040

1400

1900

source(CP4)

charge pump CP4
source current

CPOUT

= 0.7 V to

CCPLL

0.7 V; f

ref

= 20 kHz

1900

1400

1040

sink(CP5)

charge pump CP5 sink
current

CPOUT

= 0.7 V to

CCPLL

0.7 V; f

ref

= 10 kHz

1630

2 200

2970

source(CP5)

charge pump CP5
source current

CPOUT

= 0.7 V to

CCPLL

0.7 V; f

ref

= 10 kHz

2970

2200

1630

Charge pump: pin VTUNE

sink

charge pump sink
current

VTUNE

= 0.8 V to

CCPLL

0.7 V

2070

2800

3780

source

charge pump source
current

VTUNE

= 0.8 V to

CCPLL

0.7 V

3780

2800

2070

tune

tuning time

Europe FM and US FM band;
f

ref

= 100 kHz; f

= 87.5 MHz

to 108 MHz

0.75

AM MW band; f

ref

= 20 kHz;

= 0.53 MHz to 1.7 MHz

inaudible AF update
cycle time including
1 ms mute start and
1 ms mute release time

6.5

Table 109: Dynamic characteristics of the tuner

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

dBc

-----------

CC(ripple)

MPXAM

------------------------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

77 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

Antenna Digital Auto Alignment (DAA)

DAA: pin DAAOUT

[2]

leak(DAA)

antenna DAA input
leakage current on pin
VTUNE (test mode)

VTUNE

= 0.4 V to 8 V

+10

o(T)

output voltage variation
with temperature

amb

C to +85

DAA[6:0] = 100 0000

+30

o(sink)

output voltage variation
caused by sink current

VTUNE

= 4 V; I

= 50

LSB

o(source)

output voltage variation
caused by source
current

VTUNE

= 4 V; I

LSB

settling time

DAAOUT

= 0.2 V to 8.25 V;

= 270 pF

AM mode

output voltage

DAA[6:0] = 000 0000

0.5

DAA[6:0] = 111 1111

8.0

8.5

FM mode

o(n)

output noise voltage

VTUNE

= 4 V;

DAA[6:0] = 100 0000;
B = 300 Hz to 22 kHz

100

ripple rejection

VTUNE

= 4 V;

DAA[6:0] = 101 0101;
f

ripple

= 100 Hz;

CC(ripple)

= 100 mV

o(step)

step accuracy

VTUNE

= 2 V

0.5V

LSB

+0.5V

LSB

output voltage

VTUNE

= 0.5 V;

DAA[6:0] = 000 0000

0.5

VTUNE

= 4.25 V;

DAA[6:0] = 111 1111

VTUNE

= 4 V

DAA[6:0] = 000 0000

0.5

DAA[6:0] = 100 0000

3.8

4.23

4.65

VTUNE

= 2 V

DAA[6:0] = 101 0101

2.45

2.74

3.05

DAA[6:0] = 010 1010

1.3

1.46

1.6

AM channel

AM RF AGC detector A: pin AMMIX1IN; see

Figure 39

AMMIX1IN(p-p)

AM AGC start level
(peak-to-peak value)

AGC[1:0] = 00; m = 1

700

1000

1400

AM RF AGC detector B: pin AMIF2IN; see

Figure 39

AMIF2IN(p-p)

IF voltage on pin
AMIF2IN for AGC start
(peak-to-peak value)

m = 1; f

mod

= 400 Hz

0.23

Table 109: Dynamic characteristics of the tuner

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

78 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

RF cascode AGC

AGC

AGC control range

VAMCAS

cascode base voltage

AGC[1:0] = 00; maximum gain
at cascode AGC

VAMCAS

cascode base source
resistance

1.6

VAMCAS

cascode base current
drive capability

source current

100

sink current

VAMCASFB

cascode emitter
DC voltage

minimum gain at cascode
AGC

320

maximum gain at cascode
AGC

KAGC = 1

800

KAGC = 0

4.15

VAMCASFB

cascode feedback
current

RF PIN diode AGC current generator output: pin IAMAGC

AGC

AGC control range

= 999 kHz; dummy aerial

15 pF/60 pF

sink(max)

maximum AGC sink
current

IAMAGC

> 1 V

source

AGC source current

AGC not active

2.5

sink(FM)

AGC sink current in
FM mode

AGCSW = 1

0.5

AGCSW = 0

100

IAMAGC

source current
generator output
capacitance

VDCPIN

bias voltage for AM PIN
diode

4.5

5.5

VDCPIN

bias source resistance

150

bias(max)

maximum bias current

source current

sink current

AM mixer 1 (IF1 = 10.7 MHz)

Mixer input: pins AMMIX1IN and AMMIX1DEC

input resistance

[3]

13.2

input capacitance

[3]

i(max)

maximum input voltage

1 dB compression point of
V

MIX1OUT1-MIX1OUT2

; m = 0

500

Mixer output: pins MIX1OUT1 and MIX1OUT2

o(max)(p-p)

maximum output voltage
(peak-to-peak value)

m(conv)

conversion
transconductance I

1.75

2.5

3.25

Table 109: Dynamic characteristics of the tuner

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

---------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

79 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

m(conv)(T)

conversion
transconductance
variation with
temperature related to
T

amb

= 25

amb

= 85

0.2

output resistance

[4]

100

output capacitance

[4]

IP3

3rd-order intercept point R

= 2.6 k

(AC load between

output pins);

f = 300 kHz

135

138

IP2

2nd-order intercept
point

= 2.6 k

(AC load between

output pins)

170

i(n)(eq)

equivalent input noise
voltage

band limited noise;
R

gen

= 750

; noise of R

gen

included; R

= 2.6 k

(AC load between output pins)

5.8

noise figure of
AM mixer 1

4.5

7.1

AM mixer 2 (IF2 = 450 kHz)

Mixer input: pins IF1IN and IF1DEC

input resistance

[5]

330

input capacitance

[5]

i(max)(p)

maximum input voltage
(peak value)

1 dB compression point of
V

AMMIX2OUT1-AMMIX2OUT2

1.1

1.4

Mixer output: pins AMMIX2OUT1 and AMMIX2OUT2

output resistance

[6]

output capacitance

[6]

o(max)(p-p)

maximum output voltage
(peak-to-peak value)

CCAMMIX2

= 8.5 V

m(conv)

conversion
transconductance I

1.2

1.6

2.1

m(conv)(T)

conversion
transconductance
variation with
temperature related to
T

amb

= 25

amb

C to +85

IP3

3rd-order intercept point R

= 1.5 k

(AC load between

output pins);

f = 300 kHz

134

137

IP2

2nd-order intercept
point

= 1.5 k

(AC load between

output pins)

170

i(n)(eq)

equivalent input noise
voltage

gen

= 330

; noise of R

gen

included; R

= 1.5 k

(AC load between output pins)

noise figure of
AM mixer 2

19.5

leak

mixer leakage current

FM mode;
T

amb

C to +85

Table 109: Dynamic characteristics of the tuner

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

-----------

---------

-----------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

80 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

AM IF2 AGC stage: pins AMIF2IN and AMIF2DEC

[5]

input resistance

1.6

2.4

input capacitance

input voltage

for

10 dB audio

attenuation at MPXAMOUT

AGC(stop)

AGC stop voltage (input
carrier voltage)

100

AM demodulator output: pin MPXAMOUT

sens

sensitivity voltage

m = 0.3; f

mod

= 400 Hz;

= 2.15 kHz; R

gen

= 2 k

(S+N)/N = 26 dB

(S+N)/N = 46 dB

600

900

(S+N)/N

maximum signal plus
noise-to-noise ratio

m = 0.3; f

mod

= 400 Hz;

= 2.15 kHz; R

gen

= 2 k

MPXAMOUT output
voltage

m = 0.3; f

mod

= 400 Hz;

= 100

V to 100 mV

180

230

290

THD

total harmonic distortion B

= 2.15 kHz;

AMIF2IN

= 100

V to 100 mV;

m = 0.8; f

mod

= 400 Hz

0.5

AM AGC settling time

AMIF2IN

= 100

V to 100 mV

165

AMIF2IN

= 100 mV to 100

440

output resistance

500

output capacitance

load impedance

ripple rejection

ripple

= 100 Hz;

CC(ripple)

= 50 mV (RMS);

AMIF2IN

= 10 mV

AM level detector output: pin LEVEL

Input: pins AMIF2IN and AMIF2DEC

LST

level start alignment
position

i(AMIF2IN)

= 95

V; level slope

aligned to
(800

50) mV/20 dB; level

start aligned to
V

LEVEL

= (1.24

0.04) V

LEVEL

step size for adjustment
of level starting point

AMIF2IN

= 0 V; default setting

of level slope

LSL

level slope alignment
position

level slope measured from
V

i(AMIF2IN)

= 95

V to

i(AMIF2IN)

= 950

V; level

slope aligned to
(800

50) mV/20 dB

step

step size for adjustment
of level slope

AMIF2IN

= 1.4 mV

Table 109: Dynamic characteristics of the tuner

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

CC(ripple)

MPXAMOUT

-------------------------------

20 dB

--------------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

81 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

LEVEL(T)

level voltage drift over
temperature

amb

C to +85

0.03

output resistance

500

output load resistance

L(max)

maximum load
capacitance

ripple rejection

CC(ripple)

= 50 mV (RMS);

ripple

= 100 Hz;

AMIF2IN

= 10 mV

AM noise blanker IF part

sup

suppression time at IF2

IF2 = 450 kHz

noise blanker trigger
threshold

noise pulse at RF input
(

CISPR 16-1);

repetition rate = 100 Hz; pulse
duration 5 ns; t

and t

< 1 ns;

measured at dummy aerial
input (15 pF/60 pF)

NBL[1:0] = 00

1.4

NBL[1:0] = 01

1.0

NBL[1:0] = 10

0.7

modulation threshold for
blanking of audio signal

maximum modulation, which
triggers the blanking circuit in
the audio part; LODX = 0

FM channel

FM RF AGC (FM distance mode; LODX = 0)

Inputs: pins FMMIX1IN1 and FMMIX1IN2

[7]

i(RF)

RF input voltage for
start of wideband AGC

AGC[1:0] = 11

PIN diode drive output: pin IFMAGC

source(max)

maximum AGC source
current

AGC[1:0] = 00; KAGC = 0;
V

i(RF)

> V

AGC(start)

;

see

Table 34

sink(max)

maximum AGC sink
current at AGC recovery

AGC[1:0] = 00; KAGC = 0

source

AGC source current

AM mode; AGCSW = 1

2.5

AM mode; AGCSW = 0

LODX = 1 (FM local)

0.75

0.5

0.35

Voltage for narrow-band AGC: pin LEVEL

threshold voltage for
narrow-band AGC

KAGC = 1 (keyed AGC)

500

950

1400

Table 109: Dynamic characteristics of the tuner

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

-------

CC(ripple)

LEVEL(AC)

-----------------------------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

82 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

FM mixer 1 (IF1 = 10.7 MHz)

Mixer input: pins FMMIX1IN1 and FMMIX1IN2

[7]

and mixer output: pins MIX1OUT1 and MIX1OUT2

[4]

input resistance

RFGAIN = 0

3.8

4.7

RFGAIN = 1

1.6

2.0

2.5

input capacitance

output resistance

100

output capacitance

i(RF)(max)

maximum RF input
voltage

1 dB compression point of
FM mixer output voltage

100

i(n)(eq)

equivalent input noise
voltage

gen

= 200

; noise of R

gen

included; R

= 2.6 k

2.7

3.2

m(conv)

conversion
transconductance I

RFGAIN = 0

RFGAIN = 1

m(conv)(T)

conversion
transconductance
variation with
temperature

0.2

noise figure

gen

= 300

amb

2.8

amb

= 25

3.1

4.6

amb

= 85

3.5

gen

recommended
generator resistance

200

IP3

3rd-order intercept point RFGAIN = 0

120

IRR

image rejection ratio

RFwanted

= 87.5 MHz;

RFimage

= 108.9 MHz

o(max)(p-p)

maximum output voltage
(peak-to-peak value)

4.5

5.6

FM filter and demodulator

Tunable filter

max

maximum bandwidth

DYN = 1

165

kHz

DYN = 0

165

kHz

min

minimum bandwidth

DYN = 1

kHz

DYN = 0

kHz

IF2

FM IF2 center frequency
alignment step size

kHz

IF2(T)

temperature
dependence of IF2
center frequency

+60

Table 109: Dynamic characteristics of the tuner

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

-----------

---------

owanted

oimage

--------------------

-------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

83 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

FM demodulator

FM mixer 2 input: pins IF1IN and IF1DEC

[5]

and output: pin MPXAMOUT

input resistance

275

330

400

output resistance

500

load resistance

load capacitance

i(max)

maximum input voltage

280

i(start)(lim)

input voltage for start of
limiting of V

MPXAMOUT

3 dB

2.3

i(sens)

sensitivity input voltage

f = 22.5 kHz; f

mod

= 1 kHz;

de-emphasis = 50

(S+N)/N = 26 dB;
R

gen

= 330

(S+N)/N = 46 dB

(S+N)/N

ultimate signal plus
noise-to-noise ratio on
pin MPXAMOUT

f = 22.5 kHz; f

mod

= 1 kHz;

= 3 mV;

de-emphasis = 50

B = 300 Hz to 22 kHz

THD

total harmonic distortion
of V

MPXAMOUT

f = 75 kHz; f

mod

= 1 kHz;

= 10 mV

0.5

max

maximum FM deviation

THD = 3 %; f

mod

= 1 kHz;

= 10 mV

120

180

kHz

AM suppression

FM reference:

f = 22.5 kHz;

mod

= 1 kHz;

AM: m = 0.3; f

mod

= 1 kHz;

de-emphasis = 50

V < V

< 1 V

100

V < V

< 1 V

output voltage

= 20

V to 1 V

[4]

f = 1.2 kHz; f

mod

= 57 kHz

f = 22.5 kHz; f

mod

= 1 kHz

180

230

290

cut

cut-off frequency

= 0 F; R

> 20 k

kHz

ripple rejection

ripple

= 100 Hz to 20 kHz;

CC(ripple)

= 50 mV;

IF1IN

= 3 mV

FM level detector output: pin LEVEL

[5]

output resistance

500

load resistance

load capacitance

LST

level start alignment
position

i(IF1IN)

= 135

V; level slope

aligned to
(800

50) mV/20 dB; level

start aligned to
V

LEVEL

= (1.47

0.04) V

Table 109: Dynamic characteristics of the tuner

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

MPXAMOUT(FM)

MPXAMOUT(AM)

------------------------------------------

CC(ripple)

MPXAMOUT

-------------------------------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

84 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

[1]

Measured between pins XTAL1 and XTAL2.

[2]

Conversion gain formula of DAA:

where n = 0 to 127.

[3]

Input parameters of AM mixer 1 measured between pins AMMIX1IN and AMMIX1DEC.

[4]

Output parameters of FM and AM mixer 1 measured between pins MIX1OUT1 and MIX1OUT2.

[5]

Input parameters of FM mixer 2 measured between pins IF1IN and IF1DEC.

[6]

Output parameters of AM mixer 2 measured between pins AMMIX2OUT1 and AMMIX2OUT2.

[7]

Input parameters of FM mixer 1 measured between pins FMMIX1IN1 and FMMIX1IN2.

[8]

Input parameters of AM mixer 2 measured between pins AMIF2IN and AMIF2DEC.

LEVEL

step size of level start
adjustment

LSL[2:0] = 100

LSL

level slope alignment
position

level slope measured from
V

i(IF1IN)

= 135

V to

i(IF1IN)

= 1.35 mV; level slope

aligned to
(800

50) mV/20 dB

step

step size of level slope
adjustment

= 1 mV

ripple rejection

CC(ripple)

= 50 mV;

ripple

= 100 Hz

IF counter (FM IF2 or AM IF2 counter); see

Table 8

Pins IF1IN and IF1DEC

[5]

i(sens)

sensitivity voltage

FM mode

Pins AMIF2IN and AMIF2DEC

[8]

i(sens)

sensitivity voltage

AM mode; m = 0

260

Table 109: Dynamic characteristics of the tuner

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

20 dB

--------------

CC(ripple)

level(AC)

------------------------

DAAOUT

1.915

128

---------

0.1

VTUNE

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

85 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

12.2 Dynamic characteristics of the sound processor

Fig 39. AM AGC circuit

008aaa016

JFET

LNA

CASCODE

AGC

FILTER

AGC

THRESHOLD

MIXER1

MIXER2

detector A

enable 1 mA
pin diode current
(FM mode)
AGCSW

reduce cascode

AGC control range

KAGC

detector B

36, 37

27, 28

pin
diode

IAMAGC

TRFAGC

RFIN

AGC threshold
AGC[1:0]

VAMCAS

VAMCASFB

AMMIX1IN

AMMIX2OUT1,
AMMIX2OUT2

TEF6904AH

AMIF2IN

MIX1OUT1,
MIX1OUT2

IF1IN

Table 110: Dynamic characteristics of the sound processor

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Stereo decoder and AM path

o(FM)

FM mono output voltage
on pins LFOUT and
RFOUT

MPXAMOUT

= 1 kHz;

30 % FM modulation without
pilot

330

o(AM)

AM output voltage on
pins LFOUT and RFOUT

= 1 kHz;

30 % AM modulation

330

channel separation

FMMPX

= 1 kHz

f(L-R)

stereo adjust for fine
adjustment of separation

measure 1 kHz level for L

modulation; compare to 1 kHz
level for L + R modulation

CSA[3:0] = 0000

CSA[3:0] = 0001

0.2

CSA[3:0] = 1110

2.8

CSA[3:0] = 1111

3.0

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

86 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

S/N

signal-to-noise ratio

MPXAMIN

= 20 Hz to 15 kHz;

referenced to 1 kHz at
91 % FM modulation;
DEMP = 1

THD

total harmonic distortion

FM mode; DEMP = 1;
measured with 15 kHz
brick-wall low-pass filter

MPXAMIN

= 200 Hz to

15 kHz

0.3

MPXAMIN

= 50 %; L; pilot on

0.3

MPXAMIN

= 50 %; R;

pilot on

0.3

o(bal)

mono channel balance

FM mode

pilot signal suppression

9 % pilot; f

pilot

= 19 kHz;

referenced to 1 kHz at
91 % FM modulation;
DEMP = 1

subcarrier suppression

modulation off; referenced to
1 kHz at 91 % FM modulation

= 38 kHz

= 57 kHz

= 76 kHz

PSRR

power supply ripple
rejection

FM mode; f

ripple

= 100 Hz;

CC(AC)

= V

ripple

= 100 mV

(RMS)

out

frequency response

FM mode

MPXAMIN

= 20 Hz

0.5

+0.5

MPXAMIN

= 20 kHz

0.5

+0.5

cut(de-em)

cut-off frequency of
de-emphasis filter

3 dB point; see

Figure 31

DEMP = 1 (

= 50

3.18

kHz

DEMP = 0 (

= 75

2.12

kHz

i(pilot)

pilot threshold
modulation for automatic
switching by pilot input
voltage

stereo

4.0

5.5

off

1.3

2.7

hys

pilot

hysteresis of pilot
threshold voltage

Noise blanker

FM part

sup(min)

minimum suppression
time

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

----------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

87 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

MPXAMIN(M)

noise blanker sensitivity
at MPXAMIN input
(peak value of noise
pulses)

pulse

= 10

s; f

pulse

= 100 Hz

NBS[1:0] = 00

NBS[1:0] = 01

100

NBS[1:0] = 10

125

NBS[1:0] = 11

160

LEVEL(M)

noise blanker sensitivity
at LEVEL output
(peak value of noise
pulses) (test mode)

pulse

= 10

s; f

pulse

= 100 Hz

NBL[1:0] = 00

NBL[1:0] = 01

NBL[1:0] = 10

NBL[1:0] = 11

AM audio part

sup(min)

minimum suppression
time

400

noise blanker sensitivity;
triggered from pulses at
MPXAMIN slew rate

NBS[1:0] = 00

16.5

V/ms

NBS[1:0] = 01

18.6

V/ms

NBS[1:0] = 10

V/ms

NBS[1:0] = 11

23.5

V/ms

Weak signal processing

Detectors

eq(USN)

USN sensitivity

equivalent level voltage

see

Figure 24

;

MPXAMOUT

= 150 kHz;

MPXAMOUT

= 250 mV;

HCMP = 1

[1]

USS[1:0] = 00

0.06

V/kHz

USS[1:0] = 01

0.08

V/kHz

USS[1:0] = 10

0.12

V/kHz

USS[1:0] = 11

0.16

V/kHz

eq(WAM)

WAM sensitivity

equivalent level voltage

see

Figure 24

;

LEVEL

= 200 mV (p-p) at

f = 21 kHz on the level
voltage; HCMP = 1

[1]

WAS[1:0] = 00

7.5

WAS[1:0] = 01

WAS[1:0] = 10

WAS[1:0] = 11

Setting of time constants for SNC, MUTE and HCC

USN(attack)

USN detector attack time soft mute and SNC

USN(recovery)

USN detector recovery
time

soft mute and SNC

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

eq(USN)

---------------------

eq(WAM)

LEVEL(p-p)

----------------------------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

88 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

USS

USN detector
desensitization

USN sensitivity setting (USS)
versus level voltage (USN
sensitivity setting is
automatically reduced as level
voltage decreases)

LEVEL

> 1.25 V

1.25 V > V

LEVEL

> 1.125 V

1.125 V > V

LEVEL

> 1.0 V

1.0 V > V

LEVEL

WAM(attack)

WAM detector attack
time (SNC)

WAM(recovery)

WAM detector recovery
time (SNC)

peak(USN)(attack)

peak detector attack time
for USN read-out via
I

C-bus

peak(USN)(recovery)

peak detector recovery
time for USN read-out via
I

C-bus

peak(WAM)(attack)

peak detector attack time
for WAM read-out via
I

C-bus

peak(WAM)(recovery)

peak detector recovery
time for WAM read-out
via I

C-bus

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

89 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

Control functions

start(mute)

soft mute start voltage

FM mode; see

Figure 28

;

equivalent level voltage that
causes

mute

= 3 dB;

MSL[1:0] = 11

MST[2:0] = 000

0.75

MST[2:0] = 001

0.88

MST[2:0] = 010

MST[2:0] = 011

1.12

MST[2:0] = 100

1.25

MST[2:0] = 101

0.68

MST[2:0] = 110

0.73

MST[2:0] = 111

0.85

AM mode; see

Figure 29

;

equivalent level voltage that
causes

mute

= 3 dB;

MSL[1:0] = 11

MST[2:0] = 000

1.35

MST[2:0] = 001

1.58

MST[2:0] = 010

1.80

MST[2:0] = 011

1.12

MST[2:0] = 100

1.25

MST[2:0] = 101

1.50

MST[2:0] = 110

1.70

MST[2:0] = 111

1.91

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

90 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

mute

soft mute slope

FM mode; see

Figure 28

;

slope of soft mute attenuation
with respect to equivalent level
voltage; MST[2:0] = 000

MSLE = 0; MSL[1:0] = 00

dB/V

MSLE = 0; MSL[1:0] = 01

dB/V

MSLE = 0; MSL[1:0] = 10

dB/V

MSLE = 0; MSL[1:0] = 11

dB/V

MSLE = 1; MSL[1:0] = 00

dB/V

MSLE = 1; MSL[1:0] = 01

dB/V

AM mode; see

Figure 29

;

slope of soft mute attenuation
with respect to equivalent level
voltage; MST[2:0] = 011

MSLE = 0; MSL[1:0] = 00

dB/V

MSLE = 0; MSL[1:0] = 01

dB/V

MSLE = 0; MSL[1:0] = 10

dB/V

MSLE = 0; MSL[1:0] = 11

dB/V

MSLE = 1; MSL[1:0] = 00

dB/V

MSLE = 1; MSL[1:0] = 01

dB/V

MSLE = 1; MSL[1:0] = 10

dB/V

MSLE = 1; MSL[1:0] = 11

dB/V

mute(max)

maximum soft mute
attenuation by USN

see

Figure 30

;

MPXAMOUT

= 150 kHz;

MPXAMOUT

= 0.6 V (RMS);

USS[1:0] = 11

UMD[1:0] = 00

UMD[1:0] = 01

UMD[1:0] = 10

UMD[1:0] = 11

start(SNC)

SNC stereo blend start
voltage

see

Figure 25

; equivalent level

voltage that causes channel
separation is 10 dB;
SSL[1:0] = 10

SST[3:0] = 0000

1.5

SST[3:0] = 1000

2.0

SST[3:0] = 1111

2.45

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

mute

eq.LEVEL

-----------------------------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

91 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

SNC

SNC slope

see

Figure 25

; slope of

channel separation between
30 dB and 10 dB with respect
to level voltage;
SST[3:0] = 1010

SSL[1:0] = 00

dB/V

SSL[1:0] = 01

dB/V

SSL[1:0] = 10

dB/V

SSL[1:0] = 11

dB/V

start(HCC)

HCC start voltage

see

Figure 26

; f

audio

= 10 kHz;

equivalent level voltage that
causes

HCC

= 3 dB;

HSL[1:0] = 10

HST[2:0] = 000

1.17

HST[2:0] = 001

1.42

HST[2:0] = 010

1.67

HST[2:0] = 011

1.92

HST[2:0] = 100

2.17

HST[2:0] = 101

2.67

HST[2:0] = 110

3.17

HST[2:0] = 111

3.67

HCC

HCC slope

see

Figure 26

; f

audio

= 10 kHz;

HST[2:0] = 010

HSL[1:0] = 00

dB/V

HSL[1:0] = 01

dB/V

HSL[1:0] = 10

dB/V

HSL[1:0] = 11

dB/V

HCC(max)

maximum HCC
attenuation

see

Figure 26

; f

audio

= 10 kHz

HCSF = 1

HCSF = 0

cut

cut-off frequency of fixed
HCC

see

Figure 27

;

3 dB point

(first order filter)

HCF[2:0] = 000

reserved

kHz

HCF[2:0] = 001

kHz

HCF[2:0] = 010

kHz

HCF[2:0] = 011

kHz

HCF[2:0] = 100

kHz

HCF[2:0] = 101

kHz

HCF[2:0] = 110

wide

HCF[2:0] = 111

unlimited

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

SNC

eq.LEVEL

-----------------------------

HCC

10 kHz

eq.LEVEL

-----------------------------

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

92 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

Analog-to-digital converters for I

C-bus

Level analog-to-digital converter (8-bit); see

Table 10

LEVEL(min)

lower voltage limit of
conversion range

0.25

LEVEL(max)

upper voltage limit of
conversion range

4.25

LEVEL

bit resolution voltage

15.7

Ultrasonic noise analog-to-digital converter (4-bit); see

Figure 24

USN(min)

conversion range lower
deviation limit

MPXAMOUT

= 150 kHz

kHz

USN(max)

conversion range upper
deviation limit

MPXAMOUT

= 150 kHz

100

kHz

USN

bit resolution

6.25

kHz

Wideband AM analog-to-digital converter (4-bit); see

Figure 24

WAM(min)(p-p)

lower voltage limit of
conversion range
(peak-to-peak value)

LEVEL

= 21 kHz

WAM(max)(p-p)

upper voltage limit of
conversion range
(peak-to-peak value)

LEVEL

= 21 kHz

800

WAM(p-p)

bit resolution voltage
(peak-to-peak value)

53.3

Tone/volume control

input impedance

measured unbalanced;
pins INAL, INAR, INAC, INAD,
INBL, INBR, INC and IND

110

160

pins INPL and INPR

110

160

output impedance

pins LFOUT, RFOUT, LROUT
and RROUT

100

pins PLOUT and PROUT

100

s(main)

signal gain from pins
INAL, INAR, INAC, INAD,
INBL, INBR, INC and
IND to LFOUT, RFOUT,
LROUT and RROUT

s(ext)i

signal gain external input EXP1 = 1; from pins INPL and

INPR to LFOUT, RFOUT,
LROUT and RROUT

EXP1 = 0; EXP0 = 1;
from pins INPL and INPR via
tone/volume part to LFOUT,
RFOUT, LROUT and RROUT

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

93 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

s(ext)o

signal gain to external
output

see

Figure 37

; from

pins INAL, INAR, INAC, INAD,
INBL, INBR, INC and IND to
PLOUT and PROUT

via tone/volume part;
EXPS = 0

EXPS = 1

i(max)

maximum input voltage

THD = 0.2 %; G

vol

6 dB;

pins INAL, INAR, INAC, INAD,
INBL, INBR, INC and IND

i(ext)(max)

maximum input voltage
at external processor
inputs

THD = 0.2 %; pins INPL and
INPR

EXP1 = 1

EXP1 = 0; EXP0 = 1;
G

vol

3 dB

o(max)

maximum output voltage

vol

= +6 dB

THD = 0.2 %

1.4

1.8

THD = 1 %; R

= 5 k

;

= 10 nF

1.4

1.8

vol

= +3 dB;

OUTA = 1 (+3 dB)

THD = 0.2 %

2.2

THD = 0.2 %; V

= 8.0 V

1.6

1.8

= 5 k

; C

= 10 nF;

THD = 1 %

2.25

= 5 k

; C

= 10 nF;

THD = 1 %; V

= 8.0 V

1.7

1.9

max

frequency response
(pins INAL, INAR, INAC,
INAD, INBL, INBR, INC
and IND)

upper

1 dB point; referenced

to 1 kHz

kHz

ASI

attenuation during ASI

f = 20 kHz referenced to 1 kHz

0.15

CMRR

common mode rejection
ratio

vol

= 0 dB; line input

capacitance C

= 1

audio

= 1 kHz on common

mode inputs

audio

= 20 Hz to 20 kHz on

common mode inputs

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

94 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

THD

total harmonic distortion

configured as non-inverting,
single ended inputs

audio

= 20 Hz to 10 kHz;

= 1 V (RMS)

0.02

0.1

audio

= 20 Hz to 10 kHz;

= 2 V (RMS);

vol

10 dB

0.03

0.2

audio

= 25 Hz;

= 500 mV (RMS);

bass

= +8 dB; G

vol

= 0 dB

0.025

0.2

audio

= 4 kHz;

= 500 mV (RMS);

treble

= +8 dB; G

vol

= 0 dB

0.02

0.2

channel separation

audio

= 20 Hz to 20 kHz

input isolation of one
selected source to any
other input

source impedance of unused
input: 600

audio

= 20 Hz to 10 kHz

audio

= 20 kHz

noise(rms)

noise voltage
(RMS value)

ITU-R ARM-weighted and
20 kHz `brick wall' without
input signal (source
impedance 600

);

unbalanced

vol

= 0 dB

bass

= +6 dB;

treble

= +6 dB; G

vol

= 0 dB

vol

= +20 dB

100

vol

= +20 dB; balanced

100

140

vol

10 dB

vol

40 dB

9.5

13.5

outputs muted

using `A-weighting' filter and
20 kHz `brick wall';
G

vol

20 dB; start of

loudness =

12 dB

6.8

offset(max)

maximum DC offset

between any two settings
(non-consecutive) on any one
audio control

between any two settings
(non-consecutive) on volume
control; G

vol

+6 dB

between any two settings
(non-consecutive) on input
gain control; G

ing

+6 dB

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

95 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

PSRR

power supply ripple
rejection

CC(AC)

= V

ripple

= 200 mV

(RMS); G

vol

= 0 dB

ripple

= 20 Hz to 100 Hz

ripple

= 100 Hz to 1 kHz

ripple

= 1 kHz to 20 kHz

ripple

= 500 Hz

crosstalk between bus
inputs and signal outputs

clk

= 100 kHz

[2]

110

delay time from V

applied to final
DC voltage at outputs

Input gain

ing

input gain control

see

Table 76

maximum setting

[3]

minimum setting

[3]

step(vol)

step resolution

Volume

vol

volume/balance gain
control

see

Table 83

maximum setting

[3]

minimum setting

[3]

mute attenuation;
20 Hz to 20 kHz

step(vol)

step resolution

set

gain set error

vol

= +20 dB to

35 dB

0.25

vol

36 dB to

75 dB

0.55

step(vol)

gain step error

track

gain tracking error
between left and right

vol

= +20 dB to

35 dB

0.1

vol

36 dB to

75 dB

0.3

Loudness; see

Table 101

and

Figure 38

bass

loudness bass control
range

[4]

treble

loudness treble control
range

step

loudness step resolution

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

96 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

[1]

The equivalent level voltage is that value of the level voltage (on pin LEVEL) which results in the same weak signal control effect (for
instance HCC roll-off) as the output value of the specified detector (USN, WAM and MPH).

Treble

treble

treble control filter
frequency

see

Figure 35

;

3 dB

frequency of maximum treble
setting referenced to 100 kHz

TRF[1:0] = 00

kHz

TRF[1:0] = 01

kHz

TRF[1:0] = 10

kHz

TRF[1:0] = 11

kHz

treble

treble gain control

TRE[2:0] = 111; TREM = 1

TRE[2:0] = 111; TREM = 0

step(treble)

step resolution gain

step(treble)

treble step error

0.5

Bass

bass

bass control filter
frequency at maximum
gain

see

Figure 26

BAF[1:0] = 00

BAF[1:0] = 01

BAF[1:0] = 10

100

BAF[1:0] = 11

120

bass

bass gain control

BAS[3:0] = 0111; BAM = 1

BAS[3:0] = 0111; BAM = 0

step(bass)

step resolution gain

step(bass)

bass step error

0.5

bow

equalizer bowing

audio

= 1 kHz;

= 500 mV (RMS);

bass

= +12 dB; f

bass

= 60 Hz;

treble

= +12 dB;

cut(treble)

= 15 kHz

1.8

Fader

fader

fader gain control

see

Table 91

maximum setting

minimum setting

output mute

step(fader)

step resolution gain

step(fader)

fader step error

mute

audio mute

volume control: mute and
output muted (bits MULF,
MURF, MULR and MURR)

Table 110: Dynamic characteristics of the sound processor

...continued

= 8.5 V; T

amb

= 25

C; see

Figure 42

; all AC values are given in RMS; treble: 10 kHz filter frequency; treble = 0 dB;

bass: 60 Hz filter frequency; bass = 0 dB; f

audio

= 1 kHz; G

vol

= 0 dB; G

fader

= 0 dB; loudness off; standard output gain

(byte OUTPUT; bit OUTA = 0); R

= 10 k

; C

= 1 nF; internal channel; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

97 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

[2]

Crosstalk between bus inputs and signal outputs:

[3]

The input gain setting ING and the volume setting VOL define the overall volume. The overall range is limited to

83 dB to +28 dB. For

values > +28 dB the actual value is +28 dB. For overall values <

83 dB the actual value is mute.

[4]

The maximum bass gain including BASS setting is +20 dB.

13. I

C-bus characteristics

The maximum I

C-bus communication speed is 400 kbit/s. SDA and SCL HIGH and LOW

internal thresholds are specified according to an I

C-bus voltage range from 2.5 V to 3.3 V

including I

C-bus voltage tolerances of 10 %. The bus interface tolerates also SDA and

SCL signals from a 5 V bus. Restrictions for V

in a 5 V application can be derived from

Table 111

[1]

Minimum value of t

; C

= total capacitance of one I

C-bus line [pF].

[2]

Typical value of t

; the output fall time t

[ns] depends on the total load capacitance C

[pF] and the I

C-bus voltage V

[V]:

20log

bus(p-p)

o(rms)

--------------------

Table 111: I

C-bus parameters

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

LOW-level input voltage

1.09

HIGH-level input voltage

1.56

SDA

capacitance of SDA pin

SCL

capacitance of SCL pin

DOR(HL)

data output reaction time
(acknowledge and read
data) HIGH-to-LOW

= 5 V; I = 3 mA;

= 400 pF;

see

Figure 40

700

863

= 3.3 V;

= 1.8 k

;

= 400 pF;

see

Figure 40

570

668

= 2.5 V; R

= 35 k

;

= 10 pF;

see

Figure 40

520

593

DOR(LH)

data output reaction time
(read data) LOW-to-HIGH

see

Figure 40

450

488

output fall time

= 10 pF to 120 pF;

see

Figure 41

[1]

20 + 0.1C

120 pF;

see

Figure 41

[1] [2]

20 + 0.1C

250

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

99 of 108

Philips Semiconductors

TEF6904A

Integrated car radio

14. Overall system parameters

Table 112: Overall system parameters

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Supply current in FM mode

total supply current
inclusive I

V60

102

Supply current in AM mode

total supply current
inclusive I

V60

AM overall system parameters

tune

AM tuning frequency

144

288

kHz

522

1710

kHz

2.3

26.1

MHz

sens

sensitivity voltage

= 990 kHz; m = 0.3;

mod

= 1 kHz;

= 2.15 kHz;

(S+N)/N = 26 dB;
dummy aerial
15 pF/60 pF

S/N

ultimate signal-to-noise
ratio

THD

total harmonic
distortion

200

V < V

< 1 V;

m = 0.8; f

= 400 Hz

0.4

IP3

3rd-order intercept
point

f = 40 kHz

130

FM overall system parameters

tune

FM tuning frequency

108

MHz

sens

sensitivity voltage (RF
input voltage at
(S+N)/N = 26 dB)

f = 22.5 kHz;

mod

= 1 kHz;

DEMP = 1; B = 300 Hz
to 22 kHz; measured
with 75

dummy

antenna and test circuit

(S+N)/N

maximum signal plus
noise-to-noise ratio of
MPXAM output voltage

= 3 mV;

f = 22.5 kHz;

mod

= 1 kHz;

DEMP = 1; B = 300 Hz
to 22 kHz; measured
with 75

dummy

antenna and test circuit

THD

total harmonic
distortion

f = 75 kHz

0.5

IP3

3rd-order intercept
point

f = 400 kHz

120

TEF6904A_1

oninklijk

e Philips Electronics N.V

. 2006. All r

ights reser

ed.

Preliminar

y data sheet

Re
v

.
01 -- 3 Februar

y 2006

100 of 108

Philips Semiconductor

TEF6904A

Integrated car radio

15.

Application inf

ormation

Fig 42. Application diagram of TEF6904AH

reset
hold
fast
readhold

008aaa017

10 to 13

from/to EXP SEL. 1, 2

100 nF

72, 73, 74

30, 31, 32, 33

40
25

SDA

SCL

C-bus

RROUT

LROUT

RFOUT

LFOUT

INPR

100 nF

10
k

100 nF

INPL

PROUT

PLOUT

TEF6904AH

STEREO

DECODER

AM NOISE

DETECTOR

FM NOISE

DETECTOR

NOISE

BLANKER

HIGH

CUT

SNC

MULTIPATH,

LEVEL,

ADJACENT CHANNEL,

MODULATION AND

OFFSET

DETECTION

WEAK SIGNAL AND

FM BANDWIDTH

CONTROL LOGIC

HCC

EXP

SEL. 1

INPUT

SELECT

DE-EMPHASIS

s/75

INPUT GAIN,

VOLUME,

BALANCE,

MUTE

LOUDNESS,

BASS,

TREBLE

C-BUS

TUNING

STATE

MACHINE

DEMODULATOR

AM IF NOISE

DETECTOR

FM/AM

RF AGC

CASCODE
CONTROL

IF COUNT

AUDIO STEP INTERPOLATION

EXP

SEL. 2

F/R

FADER

DIV

REF

PLL

÷N

BAND

÷M

÷2

LO2 90

soft mute

tuning

mute

ana

swap

snc

hcc

LO1 90

ifbw

antenna DAA

LEVEL

USN

MOD

WAM

OFFS

mix1

2.2 pF

20.5 MHz

LINE INPUTS

10
k

100 nF

22
nF

1 nF

270 pF

100 nF

10 k

2.2 k

4.7
k

3.9

100 nF

22 nF

1 nF

47
k

6.8 pF

8.2 pF

100 pF

6.8 pF

1 mH

27 pF

220

560

47 pF

220
nF

100

100 nF

22
nF

SFE10.7MS3

SFP450H

22
nF

6.8

470 k

1 nF

10 nF

BAV99

BC848C

100

3.3

1 nF

1.2 k

22 k

BB208

BAP64-04

vcc

gnd

vref

pll

i.c.

vcm

vco

vtc

n.c.

i.c.

if1

220 pF

1.5 M

100

BF862

560

BAP70AM

100 nF

dig2

dig1

i.c.

MIXER

LO2

MIXER

LO2

LO1

MIXER

LO1

BB207

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

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Philips Semiconductors

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Integrated car radio

[1]

All low value capacitors (

1 nF) must be of NP0 type for guaranteed high frequency performance.

[2]

The capacitor is used to achieve a crystal frequency of 20.5 MHz together with the crystal type LN-G102-587.

Table 113: List of components

[1]

Symbol

Component

Type

Manufacturer

capacitor for frequency pulling

2.2 pF

[2]

capacitor for VCO tuning

270 pF

decoupling capacitor for VCO tuning

100 nF

resistor for supply V60

; 0.2 W

oscillator coil

E543SNAS-02010

TOKO

FM RF selectivity coil

C6342A-R11

SAGAMI

10.7 MHz IF transformer

PF670CCS-A065DX

TOKO

450 kHz IF transformer

P7PSGAE-A021YBY=S

TOKO

crystal 20.5 MHz

LN-G102-587

NDK

VCO varactor diode

BB208

Philips

RF selectivity varactor diode

BB207

Philips

FM PIN diode

BAP64-04

Philips

AM PIN diode

BAP70AM

Philips

Electrostatic Discharge (ESD) protection diode

BAV99

Philips

AM Low Noise Amplifier (LNA) JFET transistor

BF862

Philips

AM LNA cascode transistor

BC847C

Philips

10.7 MHz ceramic filter

SFELA10M7HAA0-B0

MURATA

450 kHz ceramic filter

CFWLA450KGFA-B0

MURATA

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Preliminary data sheet

Rev. 01 -- 3 February 2006

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Philips Semiconductors

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Integrated car radio

17. Soldering

17.1 Introduction to soldering surface mount packages

This text gives a very brief insight to a complex technology. A more in-depth account of
soldering ICs can be found in our

Data Handbook IC26; Integrated Circuit Packages

(document order number 9398 652 90011).

There is no soldering method that is ideal for all surface mount IC packages. Wave
soldering can still be used for certain surface mount ICs, but it is not suitable for fine pitch
SMDs. In these situations reflow soldering is recommended.

17.2 Reflow soldering

Reflow soldering requires solder paste (a suspension of fine solder particles, flux and
binding agent) to be applied to the printed-circuit board by screen printing, stencilling or
pressure-syringe dispensing before package placement. Driven by legislation and
environmental forces the worldwide use of lead-free solder pastes is increasing.

Several methods exist for reflowing; for example, convection or convection/infrared
heating in a conveyor type oven. Throughput times (preheating, soldering and cooling)
vary between 100 seconds and 200 seconds depending on heating method.

Typical reflow peak temperatures range from 215

C to 270

C depending on solder paste

material. The top-surface temperature of the packages should preferably be kept:

below 225

C (SnPb process) or below 245

C (Pb-free process)

for all BGA, HTSSON..T and SSOP..T packages

for packages with a thickness

2.5 mm

for packages with a thickness < 2.5 mm and a volume

350 mm

so called

thick/large packages.

below 240

C (SnPb process) or below 260

C (Pb-free process) for packages with a

thickness < 2.5 mm and a volume < 350 mm

so called small/thin packages.

Moisture sensitivity precautions, as indicated on packing, must be respected at all times.

17.3 Wave soldering

Conventional single wave soldering is not recommended for surface mount devices
(SMDs) or printed-circuit boards with a high component density, as solder bridging and
non-wetting can present major problems.

To overcome these problems the double-wave soldering method was specifically
developed.

If wave soldering is used the following conditions must be observed for optimal results:

Use a double-wave soldering method comprising a turbulent wave with high upward
pressure followed by a smooth laminar wave.

For packages with leads on two sides and a pitch (e):

larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be

parallel to the transport direction of the printed-circuit board;

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

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Philips Semiconductors

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Integrated car radio

smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the

transport direction of the printed-circuit board.

The footprint must incorporate solder thieves at the downstream end.

For packages with leads on four sides, the footprint must be placed at a 45

angle to

the transport direction of the printed-circuit board. The footprint must incorporate
solder thieves downstream and at the side corners.

During placement and before soldering, the package must be fixed with a droplet of
adhesive. The adhesive can be applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the adhesive is cured.

Typical dwell time of the leads in the wave ranges from 3 seconds to 4 seconds at 250

or 265

C, depending on solder material applied, SnPb or Pb-free respectively.

A mildly-activated flux will eliminate the need for removal of corrosive residues in most
applications.

17.4 Manual soldering

Fix the component by first soldering two diagonally-opposite end leads. Use a low voltage
(24 V or less) soldering iron applied to the flat part of the lead. Contact time must be
limited to 10 seconds at up to 300

When using a dedicated tool, all other leads can be soldered in one operation within
2 seconds to 5 seconds between 270

C and 320

17.5 Package related soldering information

[1]

For more detailed information on the BGA packages refer to the

(LF)BGA Application Note (AN01026);

order a copy from your Philips Semiconductors sales office.

[2]

All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the
maximum temperature (with respect to time) and body size of the package, there is a risk that internal or
external package cracks may occur due to vaporization of the moisture in them (the so called popcorn
effect). For details, refer to the Drypack information in the

Data Handbook IC26; Integrated Circuit

Packages; Section: Packing Methods.

[3]

These transparent plastic packages are extremely sensitive to reflow soldering conditions and must on no
account be processed through more than one soldering cycle or subjected to infrared reflow soldering with
peak temperature exceeding 217

C measured in the atmosphere of the reflow oven. The package

body peak temperature must be kept as low as possible.

Table 114: Suitability of surface mount IC packages for wave and reflow soldering methods

Package

[1]

Soldering method

Wave

Reflow

[2]

BGA, HTSSON..T

[3]

, LBGA, LFBGA, SQFP,

SSOP..T

[3]

, TFBGA, VFBGA, XSON

not suitable

suitable

DHVQFN, HBCC, HBGA, HLQFP, HSO, HSOP,
HSQFP, HSSON, HTQFP, HTSSOP, HVQFN,
HVSON, SMS

not suitable

[4]

suitable

PLCC

[5]

, SO, SOJ

suitable

LQFP, QFP, TQFP

not recommended

[5] [6]

suitable

SSOP, TSSOP, VSO, VSSOP

not recommended

[7]

suitable

CWQCCN..L

[8]

, PMFP

[9]

, WQCCN..L

[8]

not suitable

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Integrated car radio

[4]

These packages are not suitable for wave soldering. On versions with the heatsink on the bottom side, the
solder cannot penetrate between the printed-circuit board and the heatsink. On versions with the heatsink
on the top side, the solder might be deposited on the heatsink surface.

[5]

If wave soldering is considered, then the package must be placed at a 45

angle to the solder wave

direction. The package footprint must incorporate solder thieves downstream and at the side corners.

[6]

Wave soldering is suitable for LQFP, QFP and TQFP packages with a pitch (e) larger than 0.8 mm; it is
definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.

[7]

Wave soldering is suitable for SSOP, TSSOP, VSO and VSSOP packages with a pitch (e) equal to or larger
than 0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm.

[8]

Image sensor packages in principle should not be soldered. They are mounted in sockets or delivered
pre-mounted on flex foil. However, the image sensor package can be mounted by the client on a flex foil by
using a hot bar soldering process. The appropriate soldering profile can be provided on request.

[9]

Hot bar soldering or manual soldering is suitable for PMFP packages.

18. Revision history

Table 115: Revision history

Document ID

Release date

Data sheet status

Change notice

Doc. number

Supersedes

TEF6904A_1

20060203

Preliminary data sheet

Philips Semiconductors

TEF6904A

Integrated car radio

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

106 of 108

19. Data sheet status

[1]

Please consult the most recently issued data sheet before initiating or completing a design.

[2]

The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at
URL http://www.semiconductors.philips.com.

[3]

For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.

20. Definitions

Short-form specification -- The data in a short-form specification is
extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.

Limiting values definition -- Limiting values given are in accordance with
the Absolute Maximum Rating System (IEC 60134). Stress above one or
more of the limiting values may cause permanent damage to the device.
These are stress ratings only and operation of the device at these or at any
other conditions above those given in the Characteristics sections of the
specification is not implied. Exposure to limiting values for extended periods
may affect device reliability.

Application information -- Applications that are described herein for any
of these products are for illustrative purposes only. Philips Semiconductors
makes no representation or warranty that such applications will be suitable for
the specified use without further testing or modification.

21. Disclaimers

Life support -- These products are not designed for use in life support
appliances, devices, or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors

customers using or selling these products for use in such applications do so
at their own risk and agree to fully indemnify Philips Semiconductors for any
damages resulting from such application.

Right to make changes -- Philips Semiconductors reserves the right to
make changes in the products - including circuits, standard cells, and/or
software - described or contained herein in order to improve design and/or
performance. When the product is in full production (status `Production'),
relevant changes will be communicated via a Customer Product/Process
Change Notification (CPCN). Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no
license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are
free from patent, copyright, or mask work right infringement, unless otherwise
specified.

22. Trademarks

Notice -- All referenced brands, product names, service names and
trademarks are the property of their respective owners.
I

C-bus -- logo is a trademark of Koninklijke Philips Electronics N.V.

23. Contact information

For additional information, please visit: http://www.semiconductors.philips.com

For sales office addresses, send an email to: sales.addresses@www.semiconductors.philips.com

Level

Data sheet status

[1]

Product status

[2] [3]

Definition

Objective data

Development

This data sheet contains data from the objective specification for product development. Philips
Semiconductors reserves the right to change the specification in any manner without notice.

Preliminary data

Qualification

This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.

III

Product data

Production

This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).

Philips Semiconductors

TEF6904A

Integrated car radio

TEF6904A_1

Preliminary data sheet

Rev. 01 -- 3 February 2006

107 of 108

continued >>

24. Contents

General description . . . . . . . . . . . . . . . . . . . . . . 1

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Quick reference data . . . . . . . . . . . . . . . . . . . . . 2

Ordering information . . . . . . . . . . . . . . . . . . . . . 3

Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Pinning information . . . . . . . . . . . . . . . . . . . . . . 5

6.1

Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

6.2

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5

Functional description . . . . . . . . . . . . . . . . . . . 7

7.1

FM mixer 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

7.2

FM RF AGC . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

7.3

FM mixer 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

7.4

FM IF2 channel filter . . . . . . . . . . . . . . . . . . . . . 8

7.5

FM limiter and level detection . . . . . . . . . . . . . . 8

7.6

FM demodulator . . . . . . . . . . . . . . . . . . . . . . . . 8

7.7

Center frequency and bandwidth
tuning and center frequency DAA . . . . . . . . . . . 8

7.8

Bandwidth control algorithm . . . . . . . . . . . . . . . 8

7.9

VCO and dividers . . . . . . . . . . . . . . . . . . . . . . . 9

7.10

Crystal oscillator . . . . . . . . . . . . . . . . . . . . . . . . 9

7.11

Tuning PLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7.12

Antenna DAA . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7.13

AM RF AGC control . . . . . . . . . . . . . . . . . . . . . 9

7.14

AM mixer 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7.15

AM IF noise blanker . . . . . . . . . . . . . . . . . . . . 10

7.16

AM IF AGC amplifier and demodulator . . . . . . 10

7.17

AM level detection. . . . . . . . . . . . . . . . . . . . . . 10

7.18

AM and FM level DAA. . . . . . . . . . . . . . . . . . . 10

7.19

AM and FM IF counter . . . . . . . . . . . . . . . . . . 10

7.20

Tuning mute . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7.21

FM stereo decoder . . . . . . . . . . . . . . . . . . . . . 10

7.22

FM and AM AF noise blanker . . . . . . . . . . . . . 11

7.23

Fixed high cut and high cut control . . . . . . . . . 11

7.24

De-emphasis. . . . . . . . . . . . . . . . . . . . . . . . . . 11

7.25

Weak signal processing . . . . . . . . . . . . . . . . . 11

7.26

Audio step interpolation . . . . . . . . . . . . . . . . . 11

7.27

Source selector. . . . . . . . . . . . . . . . . . . . . . . . 11

7.28

VU-meter read . . . . . . . . . . . . . . . . . . . . . . . . 12

7.29

Volume and balance . . . . . . . . . . . . . . . . . . . . 12

7.30

CD compression . . . . . . . . . . . . . . . . . . . . . . . 12

7.31

Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.32

Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.33

Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.34

Fader. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.35

External processor I/O . . . . . . . . . . . . . . . . . . 13

C-bus protocol . . . . . . . . . . . . . . . . . . . . . . . . 13

8.1

Read mode. . . . . . . . . . . . . . . . . . . . . . . . . . . 14

8.1.1

Read mode: data byte IFCOUNTER . . . . . . . 14

8.1.2

Read mode: data byte LEVEL . . . . . . . . . . . . 17

8.1.3

Read mode: data byte USN/WAM . . . . . . . . . 18

8.1.4

Read mode: data byte MOD . . . . . . . . . . . . . 18

8.1.5

Read mode: data byte IFBW . . . . . . . . . . . . . 20

8.1.6

Read mode: data byte ID . . . . . . . . . . . . . . . . 20

8.1.7

Read mode: data byte TEMP . . . . . . . . . . . . . 21

8.2

Write mode. . . . . . . . . . . . . . . . . . . . . . . . . . . 21

8.2.1

Mode and subaddress byte for write . . . . . . . 27

8.2.2

Write mode: data byte BANDWIDTH . . . . . . . 34

8.2.3

Write mode: data bytes PLLM and PLLL . . . . 36

8.2.4

Write mode: data byte DAA . . . . . . . . . . . . . . 36

8.2.5

Write mode: data byte AGC . . . . . . . . . . . . . . 37

8.2.6

Write mode: data byte BAND . . . . . . . . . . . . . 38

8.2.7

Tuning overview . . . . . . . . . . . . . . . . . . . . . . . 39

8.2.8

Write mode: data byte LEVELALGN . . . . . . . 40

8.2.9

Write mode: data byte IFCF . . . . . . . . . . . . . . 40

8.2.10

Write mode: data byte IFCAP . . . . . . . . . . . . 41

8.2.10.1

Factory alignment of bits IFCAP[3:0] . . . . . . . 41

8.2.10.2

Initialization of the radio . . . . . . . . . . . . . . . . . 41

8.2.10.3

Factory alignment of IFCF . . . . . . . . . . . . . . . 41

8.2.11

Write mode: data byte ACD . . . . . . . . . . . . . . 42

8.2.12

Write mode: data byte SENSE . . . . . . . . . . . . 43

8.2.13

Write mode: data byte TIMING . . . . . . . . . . . 44

8.2.14

Write mode: data byte SNC . . . . . . . . . . . . . . 46

8.2.15

Write mode: data byte HIGHCUT. . . . . . . . . . 47

8.2.16

Write mode: data byte SOFTMUTE . . . . . . . . 50

8.2.17

Write mode: data byte RADIO . . . . . . . . . . . . 54

8.2.18

Write mode: data byte INPUT . . . . . . . . . . . . 55

8.2.19

Write mode: data byte VOLUME . . . . . . . . . . 57

8.2.20

Write mode: data byte TREBLE . . . . . . . . . . . 64

8.2.21

Write mode: data byte BASS . . . . . . . . . . . . . 65

8.2.22

Write mode: data byte FADER . . . . . . . . . . . . 67

8.2.23

Write mode: data byte OUTPUT . . . . . . . . . . 68

8.2.24

Write mode: data byte BALANCE . . . . . . . . . 69

8.2.25

Write mode: data byte LOUDNESS . . . . . . . . 70

8.2.26

Write mode: data byte POWER . . . . . . . . . . . 72

8.2.27

Write mode: data bytes RESERVED . . . . . . . 72

Limiting values . . . . . . . . . . . . . . . . . . . . . . . . 73

Thermal characteristics . . . . . . . . . . . . . . . . . 73

Static characteristics . . . . . . . . . . . . . . . . . . . 74

Dynamic characteristics . . . . . . . . . . . . . . . . . 75

12.1

Dynamic characteristics of the tuner . . . . . . . 75

12.2

Dynamic characteristics of the sound
processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

C-bus characteristics . . . . . . . . . . . . . . . . . . 97

All rights are reserved. Reproduction in whole or in part is prohibited without the prior
written consent of the copyright owner. The information presented in this document does
not form part of any quotation or contract, is believed to be accurate and reliable and may
be changed without notice. No liability will be accepted by the publisher for any
consequence of its use. Publication thereof does not convey nor imply any license under
patent- or other industrial or intellectual property rights.

Date of release: 3 February 2006

Document number: TEF6904A_1

Published in The Netherlands

Philips Semiconductors

TEF6904A

Integrated car radio

Overall system parameters . . . . . . . . . . . . . . . 99

Application information. . . . . . . . . . . . . . . . . 100

Package outline . . . . . . . . . . . . . . . . . . . . . . . 102

Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

17.1

Introduction to soldering surface mount
packages . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

17.2

Reflow soldering . . . . . . . . . . . . . . . . . . . . . . 103

17.3

Wave soldering . . . . . . . . . . . . . . . . . . . . . . . 103

17.4

Manual soldering . . . . . . . . . . . . . . . . . . . . . 104

17.5

Package related soldering information . . . . . 104

Revision history . . . . . . . . . . . . . . . . . . . . . . . 105

Data sheet status . . . . . . . . . . . . . . . . . . . . . . 106

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Contact information . . . . . . . . . . . . . . . . . . . 106

Document Outline

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: TEF6904AH/V2

Document Outline

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: TEF6904AH/V2