1
IDTQS4A201
HIGH-PERFORMANCE CMOS TWO-BY-TWO ANALOG CROSS POINT
INDUSTRIAL TEMPERATURE RANGE
AUGUST 2000
2000 Integrated Device Technology, Inc.
DSC-5553/1
c
INDUSTRIAL TEMPERATURE RANGE
FEATURES:
Low ON resistance: r
DS
(
ON
) = 5
Fast transition time: t
TRAN
= 6ns
Wide bandwidth: 1.3GHz (-3dB point)
Crosstalk: 90dB at 50KHz, -40dB at 5MHz, -30dB at 30MHz
Off-isolation: -70dB at 50KHz, -40dB at 5MHz, -30dB at
30MHz
Single 5V supply
Can be used as multiplexer or demultiplexer
TTL-compatible control inputs
Ultra-low quiescent current: 3
A
Switch turn on time of 6.5ns
Available in QSOP package
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
APPLICATIONS:
High-speed video signal switching/routing
HDTV-quality video signal routing
Phase reversal
Data acquisition
ATE systems
Telecomm routing
Token Ring transceivers
High-speed networking
FUNCTIONAL BLOCK DIAGRAM
IDTQS4A201
QUICKSWITCH
PRODUCTS
HIGH-PERFORMANCE CMOS
TWO-BY-TWO ANALOG
CROSS POINT SWITCH
DESCRIPTION:
The QS4A201 is a high-performance CMOS two-by-two analog cross
point switch. This device provides two sets of five high-speed CMOS
switches providing "cross point" connection between inputs and outputs.
The low ON resistance of the QS4A201 allows inputs to be connected to
outputs with low insertion loss and high bandwidth. TTL-compatible control
circuitry with "Break-Before-Make" feature prevents contention.
The QS4A201 with 1.3GHz bandwidth makes it ideal for high-perfor-
mance video signal switching, audio signal switching, and telecomm routing
applications. High performance and low power dissipation makes this
device ideal for battery operated and remote instrumentation applications.
The QS4A201 is offered in the QSOP package and has several
advantages over conventional packages such as PDIP and SOIC, includ-
ing:
Reduced signal delays due to denser component packaging on circuit
boards
Reduced system noise due to less pin inductance
The QS4A201 is characterized for operation at -40C to +85C.
CO NTROL
LOGIC
S
E
A
0
C
0
B
0
D
0
A
4
C
4
B
4
D
4
2
INDUSTRIAL TEMPERATURE RANGE
IDTQS4A201
HIGH-PERFORMANCE CMOS TWO-BY-TWO ANALOG CROSS POINT
PIN CONFIGURATION
QSOP
TOP VIEW
Symbol
Description
Max
Unit
V
TERM
(2)
Supply Voltage to Ground
0.5 to +7
V
V
TERM
(3)
DC Switch Voltage V
S
0.5 to +7
V
--
Analog Input Voltage
0.5 to +7
V
V
TERM
(3)
DC Input Voltage V
IN
0.5 to +7
V
V
AC
AC Input Voltage (pulse width
20ns)
3
V
I
OUT
DC Output Current
120
mA
P
MAX
Maximum Power Dissipation
0.7
W
T
STG
Storage Temperature
65 to +150
C
ABSOLUTE MAXIMUM RATINGS
(1)
Pin Names
I/O
Description
Ax, Bx
I/O
Ports A, B
Cx, Dx
I/O
Ports C, D
E
I
Bus Switch Enable
S
I
Bus Exchange
PIN DESCRIPTION
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
2. V
CC
terminals.
3. All terminals except V
CC
.
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
E
S
Ax
Bx
Function
H
X
Z
Z
Disable
L
L
C x
Dx
Enable
L
H
Dx
C x
Exchange
FUNCTION TABLE
(1)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
E
C
0
A
0
B
0
D
0
C
1
A
1
B
1
D
1
C
2
A
2
GND
V
CC
D
4
B
4
A
4
C
4
D
3
B
3
A
3
C
3
D
2
B
2
S
3
IDTQS4A201
HIGH-PERFORMANCE CMOS TWO-BY-TWO ANALOG CROSS POINT
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Industrial: T
A
= 40C to +85C, V
CC
= 5V 5%
Symbol
Parameter
Test Conditions
Min.
Typ.
(1)
Max.
Unit
Analog Switch
V
IN
Analog Signal Range
(2)
0.5
1
Vcc - 1
V
r
DS
(
ON
)
Drain-source ON resistance
(2,3)
Vcc = Min., V
IN
= 0V
, I
ON
= 30mA
--
5
7
Vcc = Min., V
IN
= 2.4V
, I
ON
= 15mA
--
13
17
I
C(OFF)
Channel Off Leakage Current
Ax, Bx = Vcc or 0V; Cx, Dx = 0V or Vcc; E = Vcc
--
1
--
nA
I
C(ON)
Channel On Leakage Current
Ax = Bx = 0V
--
1
--
nA
(each channel is turned on sequentially)
Digital Control
V
IH
Input HIGH Voltage
Guaranteed Logic HIGH for Control Pins
2
--
--
V
V
IL
Input LOW Voltage
Guaranteed Logic LOW for Control Pins
--
--
0.8
V
Dynamic Characteristics
t
TRANS
Exchange Switching Time
R
L
= 1K
, C
L
= 100pF
0.5
--
6.6
ns
S to Cx, Dx
(See Transition Time)
t
ON(E)
Enable Turn-On Time
R
L
= 1K
, C
L
= 100pF
0.5
--
6.5
ns
E to Cx, Dx
(See Switching Time)
t
OFF(E)
Enable Turn-Off Time
R
L
= 1K
, C
L
= 100pF
0.5
--
6
ns
E to Cx, Dx
(See Switching Time)
t
PD
Group Delay
(2,4a)
R
L
= 1K
, C
L
= 100pF
--
--
250
ps
f
3dB
-3dB Bandwidth
V
IN
= 0 to 1V, 1Vp-p, R
L
= 75
--
1.3
--
GHz
Off-isolation
V
IN
= 0 to 1V, 1Vp-p, R
L
= 75
, f = 5.5MHz
--
-40
--
dB
X
TALK
Crosstalk
V
IN
= 0 to 1V, 1Vp-p, R
L
= 75
, f = 5.5MHz
--
-40
--
dB
C
(OFF)
Switch Off Capacitance
E = Vcc, V
IN
= V
OUT
= 0V
--
5
--
pF
C
(ON)
Switch On Capacitance
E = 0V, V
IN
= V
OUT
= 0V
--
10
--
pF
Q
CI
Charge Injection
--
1.5
--
pC
NOTES:
1. Typical values are at V
CC
= 5.0V, T
A
= 25C.
2. Max value is guaranteed but not production tested.
3. Measured by voltage drop between A and C pins or B and D pins at indicated current through the switch. ON resistance is determined by the lower of the voltages on the
two (A, C, or B, D) pins.
4. The bus switch contributes no group delay other than the RC delay of the ON resistance of the switch and load capacitance. Group delay of the bus switch, when used
in a system, is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions
Max.
Unit
I
CC
Supply Current
V
CC
= Max., V
IN
= GND or V
CC
3
A
4
INDUSTRIAL TEMPERATURE RANGE
IDTQS4A201
HIGH-PERFORMANCE CMOS TWO-BY-TWO ANALOG CROSS POINT
TYPICAL CHARACTERISTICS
NOTES:
1. Crosstalk = 20 log |V
O
/V
S
|
2. Off-isolation = 20 log |V
O
/V
S
|
NOTES:
1. Crosstalk = 20 log |V
O
/V
S
|
2. Off-isolation = 20 log |V
O
/V
S
|
NOTES:
1. Crosstalk = 20 log |V
O
/V
S
|
2. Off-isolation = 20 log |V
O
/V
S
|
NOTE:
1. Insertion Loss = 20 log |V
O
/V
S
|
Off-isolation and Crosstalk vs. Frequency
Off-isolation and Crosstalk vs. Frequency
Off-isolation and Crosstalk vs. Frequency
Insertion Loss vs. Frequency
180
150
120
90
60
30
0
1K
10K
100K
1M
10M
100M
1G
10G
Freq uen cy (H z)
(
d
B
)
Crosstalk
V
C C
= 5V
R
L
= 75
Off-isolation
60
50
40
30
20
500M
10
0
Frequency (Hz)
(
d
B
)
Crosstalk
600M
700M
400M
300M
200M
100M
Off-isolation
V
CC
= 5V
R
L
= 75
160
140
120
100
80
50K
60
40
Frequency (Hz)
(
d
B
)
60K
70K
40K
30K
20K
10K
Off-isolation
Crosstalk
V
CC
= 5V
R
L
= 75
1
0
1
2
3
4
1K
10K
100K
1M
10M
100M
1G
10G
5
6
Frequency (Hz)
(
d
B
)
R
L
= 75
V
CC
= 5V
5
IDTQS4A201
HIGH-PERFORMANCE CMOS TWO-BY-TWO ANALOG CROSS POINT
INDUSTRIAL TEMPERATURE RANGE
TYPICAL CHARACTERISTICS (CONTINUED)
Insertion Loss vs. Frequency
On-Resistance vs. V
IN
NOTE:
1. Insertion Loss = 20 log |V
O
/V
S
|
16
14
12
10
8
0.0
0.5
1.0
1.5
2.0
2.5
3.0
6
4
V
IN
(Volts)
r
D
S
(
O
n
)
-
D
r
a
i
n
S
o
u
r
c
e
O
n
-
r
e
s
i
s
t
a
n
c
e
(
)
V
CC
= 4.75V
18
R
ON
LINK
2
1
0
1
2
3
1G
Freq uen cy (Hz)
(
d
B
)
1.1G
700M
800M
900M
500M
600M
V
CC
= 5V
R
L
= 75
6
INDUSTRIAL TEMPERATURE RANGE
IDTQS4A201
HIGH-PERFORMANCE CMOS TWO-BY-TWO ANALOG CROSS POINT
Transition Time
TEST CIRCUITS
Switching Time
A0-A3
B0-B3
C0-C3
GND
5V
V
OUT
500
50 pF
Vcc
5V
E
S
50
V
IN
QS4A201
t
SWITCH
t
SWITCH
SELECT
INPUT
SWITCH
OUTPUT
3.0V
1.5V
0V
1.5V
C4
B4
A4
A0-A3
C0-C3
C4
GND
5V
500
50 pF
Vcc
5V
S
E
50
QS4A201
A4
CONTROL
INPUT
OUTPUT
3.0V
1.5V
0V
t
ON(E)
0.3V
t
OFF(E)
0.3V
OUTPUT
3.0V
1.5V
0V
CONTROL
INPUT
V
OUT
V
IN
7
IDTQS4A201
HIGH-PERFORMANCE CMOS TWO-BY-TWO ANALOG CROSS POINT
INDUSTRIAL TEMPERATURE RANGE
Insertion Loss
NOTES:
1. Insertion Loss = 20 log |V
O
/V
S
|
2. All unused pins are grounded.
Crosstalk
NOTES:
1. Crosstalk = 20 log |V
O
/V
S
|
2. All unused pins are grounded.
Off-Isolation
NOTES:
1. Off-isolation = 20 log |V
O
/V
S
|
2. All unused pins are grounded.
TEST CIRCUITS (CONTINUED)
GND
V
OUT
Vcc
5V
V
S
QS4A201
A
4
E
C
4
R
L
=
75
S
GND
V
OUT
Vcc
5V
V
S
QS4A201
B
4
C
4
A
4
E
R
L
=
75
S
GND
V
OUT
Vcc
5V
V
S
QS4A201
C
4
A
4
E
R
L
=
75
S
8
INDUSTRIAL TEMPERATURE RANGE
IDTQS4A201
HIGH-PERFORMANCE CMOS TWO-BY-TWO ANALOG CROSS POINT
ORDERING INFORMATION
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015 or 408-727-6116
logichelp@idt.com
Santa Clara, CA 95054
fax: 408-492-8674
(408) 654-6459
www.idt.com
IDTQS
XXXXX
XX
Package
Device Type
Quarter Size Outline Package
Q
4A201
High Performance CMOS Two-by-Two Analog
Cross Point Switch
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