1/10
September 2002
s
HIGH SPEED:
t
PD
= 0.3ns (MAX.) at V
CC
= 4.5V
t
PD
= 0.8ns (MAX.) at V
CC
= 3.0V
t
PD
= 1.2ns (MAX.) at V
CC
= 2.3V
s
VERY LOW POWER DISSIPATION:
I
CC
= 1
A(MAX.) at T
A
=85C
s
LOW "ON" RESISTANCE V
IN
=0V:
R
ON
=7
(MAX.T
A
=85C) atV
CC
=4.5V
R
ON
= 9
(MAX. T
A
=85C) at V
CC
= 3.0V
s
WIDE OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 1.65V to 5.5V SINGLE SUPPLY
s
TTL THRESOLD ON CONTROL INPUT at
V
CC
= 2.7 to 3.6V
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 3157
s
LATCH-UP PERFORMANCE EXCEEDS
300mA (JESD 17)
DESCRIPTION
The STG3157 is an high-speed spdt CMOS
ANALOG S.P.D.T. (Single Pole Dual Throw)
SWITCH or 2:1 Multiplexer/Demultiplexer Bus
Switch
fabricated
in
silicon
gate
C
2
MOS
tecnology. It designed to operate from 1.65V to
5.5V, making this device ideal for portable
applications.
It offers very low
ON-Resistance (<9
)
at
V
CC
=3.0V. The IN input is provided to control the
S.P.D.T. switch, it's compatible with standard
CMOS output.
The switch S1 is ON (it is
connected to common Port D) when the IN input is
held high and OFF (high impedance state exists
between the two ports) when IN is held low; the
switch S2 is ON (it is connected to common Port
D) when the IN input is held low and OFF (high
impedance state exists between the two ports)
when IN is held high. Additional key faetures are
fast switching speed, Break Before Make Delay
Time and Very Low Power Consumption. All
inputs and output are equipped with protection
circuits against static discharge, giving them ESD
immunity and transient excess voltage.
It's available in the commercial temperature range
in smallest six lead smd package on the market.
STG3157
LOW VOLTAGE LOW ON RESISTANCE SPDT SWITCH
WITH BREAK BEFORE MAKE FEATURE
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE
T & R
SOT323-6L
STG3157CTR
SOT323-6L
STG3157
2/10
INPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
*) High Impedance
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occour. Functional operation under these condition is
not implied
RECOMMENDED OPERATING CONDITIONS
1) Truth Table guaranteed: 1.2V to 6.0V
PIN No
SYMBOL
NAME AND FUNCTION
1, 3
S1, S2
Independent Channel
4
D
Common Channel
6
IN
Control
5
V
CC
Positive Supply Voltage
2
GND
Ground (0V)
IN
SWITCH S1
SWITCH S2
H
ON
OFF(*)
L
OFF(*)
ON
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage
-0.5 to +7.0
V
V
I
DC Input Voltage
-0.5 to V
CC
+ 0.5
V
V
IC
DC Control Input Voltage
-0.5 to Vcc + 0.5
V
V
O
DC Output Voltage
-0.5 to V
CC
+ 0.5
V
I
IKC
DC Input Diode Current on control pin (V
IN
< 0V)
50
mA
I
IK
DC Input Diode Current (V
IN
< 0V)
50
mA
I
OK
DC Output Diode Current
20
mA
I
O
DC Output Current
+
128
mA
I
CC
or I
GND
DC V
CC
or Ground Current
100
mA
T
stg
Storage Temperature
-65 to +150
C
T
L
Lead Temperature (10 sec)
300
C
Symbol
Parameter
Value
Unit
V
CC
Supply Voltage (note 1)
1.65 to 5.5
V
V
I
Input Voltage
0 to V
CC
V
V
IC
Control Input Voltage
0 to 5.5
V
V
O
Output Voltage
0 to V
CC
V
T
op
Operating Temperature
-55 to 125
C
dt/dv
Input Rise and Fall Time Control Input for Vcc= 2.3V - 3.6V
0 to 10
ns/V
Input Rise and Fall Time Control Input for Vcc= 4.5V - 5.5V
0 to 5
STG3157
4/10
AC ELECTRICAL CHARACTERISTICS (C
L
= 50pF, R
L
= 500
)
ANALOG SWITCH CHARACTERISTICS (C
L
= 5pF, R
L
=50
, T
A
=25C)
I
IN
Input
Leakage
Current
0 - 5.5
V
IN
= 0 to 5.5V
0.05
0.1
1
10
A
I
CC
Quiescent
Supply
Current (All
Channel ON
or OFF)
5.5
V
IN
=V
CC
or
GND
1
1
10
A
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25C
-40 to 85C
-55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
t
LH,
t
HL
Propagation Delay
1.65-1.95
V
I
=OPEN
ns
2.3-2.7
1.2
1.2
1.8
3.0-3.6
0.8
0.8
1.2
4.5-5.5
0.3
0.3
0.5
t
PZH,
t
PZL
Output Enable
Time (D to S
n
)
1.65-1.95
7
15
7
20
7
27
ns
2.3-2.7
3.5
11
3.5
14
3.5
17
3.0-3.6
2.5
7
2.5
7.6
2.5
9
4.5-5.5
1.7
5.2
1.7
5.7
1.7
7
t
PLZ,
t
PHZ
Output Disable
Time (D to S
n
)
1.65-1.95
3
10
3
13
3
16
ns
2.3-2.7
2
7
2
7.5
2
9
3.0-3.6
1.5
5
1.5
5.3
1.5
6.5
4.5-5.5
1.7
3.5
1.7
3.8
1.7
5
t
D
Break Before Make
Time Delay
1.65-5.5
0.5
0.5
0.5
ns
Q
Charge injection
5
23
pC
3.3
19
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25C
-40 to 85C
-55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
OIRR
Off Isolation
1.65-5.5
R
L
= 50
f= 10MHz
-57
dB
Xtalk
Crosstalk
1.65-5.5
R
L
= 50
f= 10MHz
-54
dB
BW
-3dB Bandwidth
1.65-5.5
R
L
= 50
250
MHz
C
IN
Control Pin Input
Capacitance
5
pF
C
Sn
Sn Port
Capacitance
5.0
f= 1MHz
13
C
D
D Port Capacitance
when Switch is
Enabled
5.0
f= 1MHz
21
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25C
-40 to 85C
-55 to 125C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
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