1
IDTQS4A101
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPST SWITCH
INDUSTRIAL TEMPERATURE RANGE
AUGUST 2000
2000 Integrated Device Technology, Inc.
DSC-5552/1
c
INDUSTRIAL TEMPERATURE RANGE
FEATURES:
Low ON resistance: r
DS
(
ON
) = 5
Wide bandwidth: 1.4GHz (-3dB point)
Crosstalk: 122dB at 50KHz, -80dB at 5MHz, -65dB at 30MHz
Off-isolation: -100dB at 50KHz, -75dB at 5MHz, -45dB at
30MHz
Single 5V supply
Bidirectional signal flow
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
Audio signal switching/routing
Data acquisition
ATE systems
Telecomm routing
Token Ring transceivers
High-speed networking
FUNCTIONAL BLOCK DIAGRAM
IDTQS4A101
QUICKSWITCH
PRODUCTS
HIGH-PERFORMANCE CMOS ANALOG
FOUR-CHANNEL SPST SWITCH
WITH INDIVIDUAL ENABLES
DESCRIPTION:
The QS4A101 is a high-performance CMOS analog four-channel SPST
switch with individual enables. This device provides a set of four high-speed
CMOS switches connecting inputs to outputs. The low ON resistance of the
QS4A101 allows inputs to be connected to outputs with low insertion loss and
high bandwidth.
The QS4A101, with 1.4GHz bandwidth, is ideal for high-performance
video signal switching, audio signal switching, and telecomm routing
applications. Low power dissipation makes this device ideal for battery
operated and remote instrumentation applications.
The QS4A101 is offered in the QSOP package which 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 QS4A101 is characterized for operation at -40C to +85C.
C O N T R O L
L O G I C
A 1
A 2
A 3
A 4
B 1
B 2
B 3
B 4
E 1
E 2
E 3
E 4
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INDUSTRIAL TEMPERATURE RANGE
IDTQS4A101
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPST SWITCH
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
A
1
-A
4
I/O
Port A
B
1
-B
4
I/O
Port B
E
1
-E
4
I
Port Switch Enable
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
.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
E 1
A 1
B 1
E 2
A 2
B 2
G ND
V
CC
E 4
A 4
B 4
E 3
A 3
B 3
N C
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
E
A
B
Function
L
H
H
Connect
L
L
L
Connect
H
X
X
Disconnect
FUNCTION TABLE
(1)
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions
Max.
Unit
I
CC
Supply Current
V
CC
= Max., V
IN
= GND or V
CC
3
A
3
IDTQS4A101
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPST SWITCH
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
A = Vcc or 0V, B = 0V or Vcc, E = Vcc
--
1
--
nA
I
C(ON)
Channel On Leakage Current
A = B = 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
ON(E)
Enable Turn-On Time
R
L
= 1K
, C
L
= 100pF
0.5
--
6.5
ns
E to A, B
(See figure 9)
t
OFF(E)
Enable Turn-Off Time
R
L
= 1K
, C
L
= 100pF
0.5
--
6
ns
E to A, B
(See figure 9)
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
--
1.4
--
GHz
Off-isolation
V
IN
= 0 to 1V, 1Vp-p, R
L
= 75
, f = 5.5MHz
--
-80
--
dB
X
TALK
Crosstalk
V
IN
= 0 to 1V, 1Vp-p, R
L
= 75
, f = 30MHz
--
-75
--
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 at indicated current through the switch ON resistance is determined by the lower of the voltages on the two (A, B)
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.
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INDUSTRIAL TEMPERATURE RANGE
IDTQS4A101
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPST SWITCH
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
|
18 0
15 0
12 0
90
60
1K
10K
100 K
1M
1 0M
100M
1G
10 G
30
0
F req u e n cy (H z)
(
d
B
)
Crossta lk
O ff-isolation
V
CC
= 5V
R
L
= 75
60
50
40
30
20
10
0
V
CC
= 5V
R
L
= 75
500M
Frequency (Hz)
(
d
B
)
Crosstalk
600M
700M
400M
300M
200M
100M
Off-isolation
160
140
120
100
80
50K
60
40
Frequency (Hz)
(
d
B
)
60K
70K
40K
30K
20K
10K
Crosstalk
Off-isolation
V
CC
= 5V
R
L
= 75
2
1
0
1
2
3
4
1K
10K
100K
1M
10M
100M
1G
10G
5
6
Frequency (Hz)
(
d
B
)
V
CC
= 5V
R
L
= 75
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
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IDTQS4A101
HIGH-PERFORMANCE CMOS ANALOG FOUR-CHANNEL SPST SWITCH
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
600M
Freq uen cy (H z)
(
d
B
)
700M
300M
400M
500M
100M
200M
V
C C
= 5V
R
L
= 75
Switching Time
A1-A3
B1-B3
B4
GND
5V
V
OUT
500
50 pF
Vcc
5V
E1-E3
5V
50
V
IN
QS4A101
CONTROL
INPUT
OUTPUT
3.0V
1.5V
0V
t
ON(E)
0.3V
t
OFF(E)
0.3V
OUTPUT
A4
3.0V
1.5V
0V
CONTROL
INPUT
E4
TEST CIRCUITS
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