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Электронный компонент: TDA1579

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DATA SHEET
Product specification
File under Integrated Circuits, IC01
May 1992
INTEGRATED CIRCUITS
TDA1579
TDA1579T
Decoder for traffic warning (VWF)
radio transmissions
May 1992
2
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
GENERAL DESCRIPTION
The TDA1579 decoder is for radio transmissions having
57 kHz amplitude-modulated subcarriers as used in the
German 'Verkehrs Warnfunk' (VWF) traffic warning
system.
Features
Selective subcarrier amplifier (57 kHz) with gain control
Transmitter identification signal (SK) decoder
Area identification signal (BK) and announcement
identification signal (DK) active filtering
BK and DK decoders (Schmitt trigger with switched
hysteresis)
BK and DK switch-on/switch-off delay circuits
Driver output for SK indicator (LED)
SK and BK control outputs.
QUICK REFERENCE DATA
Measured in Fig.1 at V
iSK
= 8 mV; f = 57 kHz amplitude modulated with f
m
= 34.95 Hz and m = 60% for
`BK-traffic area C' signal; or with f
m
= 125 Hz and m = 30% for DK signal.
PACKAGE OUTLINES
TDA1579: 18-lead DIL; plastic (SOT102); SOT102-1; 1996 August 12.
TDA1579T: 20-lead mini-pack; plastic (SO20; SOT163A); SOT163-1; 1996 August 12.
PARAMETER
CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
Supply voltage
V
P
7.5
8.5
12
V
Supply current
I
P
-
6
-
mA
Nominal input voltage
at f = 57 kHz
V
iSK
-
8
-
mV
Input impedance
at f
57 kHz
Z
i
100
-
-
k
Control level
-
3 dB
V
iSK
-
2.4
-
mV
Input voltage
peak-to-peak value
V
i(p-p)
2
-
-
V
SK switch-on
threshold level
m
BKon
-
42
-
%
SK switch hysteresis
m
BK
-
3.5
-
dB
SK switch-on delay
t
dSKon
-
150
-
ms
SK switch-off delay
t
dSKoff
-
750
-
ms
DK switch-on
threshold level
m
DKon
-
13
-
%
DK switch hysteresis
m
DK
-
3.6
-
dB
DK switch-on delay
t
dDKon
-
750
-
ms
DK switch-off delay
t
dDKoff
-
750
-
ms
Ambient operating
temperature range
T
amb
-
30
-
+
80
C
May 1992
3
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134). All pin numbers in this table apply to
TDA1579; for TDA1579T refer to Fig.1.
CHARACTERISTICS
V
P
= 8.5 V; T
amb
= 25
C; measured at nominal input signal: V
iSK
= 8 mV, f = 57 kHz amplitude modulated with
f
m
= 34.95 Hz and m = 60% for `BK-traffic area C' signal; or with f
m
= 125 Hz and m = 30% for DK signal.
All pin numbers in this table apply to TDA1579, for TDA1579T refer to Fig.1.
PARAMETER
CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
Supply voltage
pin 7
V
P
= V
7-18
-
-
15
V
Switch output voltage
pin 1
V
1-18
-
-
23
V
pins 2 or 3
V
2; 3-18
-
-
15
V
pins 1, 2 or 3
-
V
1; 2; 3-18
-
-
0.5
V
Switch output current
pin 1
I
1
-
-
50
mA
pins 2 or 3
I
2; 3
-
-
5
mA
pins 1, 2 or 3
-
I
1; 2; 3
-
-
10
mA
Signal input voltage
pin 13
V
13-18
-
-
V
P
pin 13
-
V
13-18
-
-
0.5
V
Signal input current
pin 13
-
I
13
-
-
10
mA
Total power dissipation
P
tot
-
-
800
mW
Storage temperature
range
T
stg
-
55
-
+
150
C
Operating ambient
temperature range
T
amb
-
30
-
+
80
C
PARAMETER
CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
Supply voltage
pin 7
V
P
7.5
-
12
V
Supply current
pin 7
I
P
-
6
10
mA
SK amplifier/decoder
Input impedance
f
57 kHz
|Z
i
|
100
-
-
k
Input voltage (peak-to-
peak value)
V
i(p-p)
2
-
-
V
Input voltage at start of
gain control
V
o9BK
=
-
3 dB
V
iSK
-
2.4*
-
mV
Voltage gain
V
9BK
/V
13SK
G
v9-13
-
44*
-
dB
Gain spread
G
v9-13
-
-
2
dB
Gain control range
G
v
40
-
-
dB
Controlled output voltage
V
o9BK
-
440
-
mV
V
o9DK
-
220
-
mV
May 1992
4
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
BK circuit
Switch-on threshold level
pin 3 high-Z
V
o5BKon
600
670
750
mV
Switch hysteresis
3
3.5
4
dB
BK switch threshold level
for BK-off (SK-off)
pin 3
conducting
V
4-18off
0.8
0.88
0.97
V
(typ. value = 0.21V
8-18
)
SK output (pin 3)
allowable load current
I
3
-
-
1.5
mA
saturation voltage
I
3
= 1.5 mA
V
3-18sat
-
-
0.35
V
rejection voltage
I
3
< 5
A
V
3-18
18
-
-
V
Indicator driver (pin 1)
allowable load current
I
1
-
-
40
mA
saturation voltage
I
1
= 20 mA
V
1-18sat
-
-
0.8
V
rejection voltage
I
1
< 10
A
V
1-18
23
-
-
V
DK circuit
Switch-on threshold level
pin 2 high-Z
V
15DKon
600
670
750
mV
Switch hysteresis
3.1
3.6
4.1
dB
DK switch threshold level
for DK-off (Schmitt
pin 2
trigger output)
conducting
V
16-18off
-
0.6
-
V
(typ. value 1
V
BE
)
DK output (pin 2)
allowable load current
I
2
-
-
1.5
mA
saturation voltage
I
2
= 1.5 mA
V
2-18sat
-
-
0.35
V
rejection voltage
I
2
< 5
A
V
2-18
18
-
-
V
BK and DK filter amplifiers
Open loop gain
f = 100 Hz
G
o
84
-
-
dB
Current gain
G
i
120
-
-
dB
Input bias current
I
i
-
-
50
nA
Output offset voltage
R
5-6
= R
14-15
= 680 k
V
o5-8
-
-
50
mV
V
15-8
Available output current
I
o
1
-
-
mA
Output resistance
R
o
-
2
3.5
k
Allowable load
capacitance
C
L
-
-
50
pF
PARAMETER
CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT
V
o5BKon
V
o5BKoff
----------------------
V
15DKon
V
15DKoff
----------------------
May 1992
5
Philips Semiconductors
Product specification
Decoder for traffic warning (VWF) radio
transmissions
TDA1579
TDA1579T
* Selectable by R
12-8
or Z
10-8
.
Internal reference voltage
Output voltage
V
8-18
4.0
4.25
4.5
V
(typ. value = 0.5 V
P
)
Internal resistance of
voltage source
R
8
-
-
5
Available output current
-
I
8
2
-
-
mA
+
I
8
0.6
-
-
mA
Output short-circuit current
-
I
8sc
-
8
-
mA
(typ. value = V
P
/1 k
)
Reference current source
Reference voltage
V
17-18
-
3.6
-
V
(typ. value = V
8-18
-
V
BE
)
Internal biasing resistor
R
i17
-
5
-
k
Allowable range of external
reference resistor
R
17-18
180
-
270
k
PARAMETER
CONDITIONS
SYMBOL
MIN.
TYP.
MAX.
UNIT