Page 1
LOW VOLTAGE LOW ON RESISTANCE SPDT SWITCH
WITH BREAK BEFORE MAKE FEATURE
■ HIGH SPEED:
t
= 0.3ns (MAX.) at VCC=4.5V
PD
t
= 0.8ns (MAX.) at VCC=3.0V
PD
= 1.2ns (MAX.) at VCC=2.3V
t
PD
■ VERY LOW POWER DISSIPATION:
=1µA(MAX.) at TA=85°C
I
CC
■ LOW "ON" RESISTANCE V
=7Ω(MAX.TA=85°C) atVCC=4.5V
R
ON
R
=9Ω(MAX. TA=85°C) at VCC=3.0V
ON
■ WIDE OPERATING VOLTAGE RANGE:
V
(OPR) = 1.65V to 5.5V SI NGLE SU PPLY
CC
■ TTL THRESOLD ON CONTROL INPUT at
V
= 2.7 to 3.6V
CC
■ PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 3157
■ LATCH-UP PE RFORMANCE 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
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
V
=3.0V. The IN input is provided to control the
CC
S.P.D.T. switch, it’s compatible with standard
IN
=0V:
2
MOS
Ω)at
STG3157
SOT323-6L
ORDER CODES
PACKAGE T & R
SOT323-6L STG3157CTR
CMOS output . The switch S1 is ON (it is
connected to c ommon Port D) w hen the IN input is
held high and OFF (high impedance state exists
between the two ports) wh en 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 exist s 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 exces s voltage.
It’s available in the commercial temperature range
in smallest s ix lead smd package on the market.
PIN CONNECTION AND IEC LOGIC SYMB OLS
1/10September 2002
Page 2
STG3157
INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No SYMBOL NAME AND FUNCTION
1, 3 S1, S2 Independent Channel
4 D Common Channel
6 IN Control
5
2 GND Ground (0V)
TRUTH TABLE
IN SWITCH S1 SWITCH S2
H ON OFF(*)
L OFF(*) ON
*) High Impedance
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
V
V
V
I
IKC
I
I
OK
I
or I
I
CC
T
T
Absolute Maximum Ratings are those values beyond which damage to the device may occour. Functional operation under these condition is
not implied
Supply Voltage
CC
DC Input Voltage -0.5 to VCC+ 0.5
I
DC Control Input Voltage
IC
DC Output Voltage -0.5 to VCC+ 0.5
O
DC Input Diode Current on control pin (VIN<0V)
DC Input Diode Current (VIN< 0V)
IK
DC Output Diode Current
DC Output Current
O
DC VCCor Ground Current
GND
Storage Temperature
stg
Lead Temperature (10 sec)
L
V
CC
Positive Supply Voltage
-0.5 to +7.0 V
-0.5 to Vcc + 0.5 V
± 50 mA
± 50 mA
± 20 mA
+ 128 mA
± 100 mA
-65 to +150 °C
300 °C
V
V
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Value Unit
V
V
V
V
T
dt/dv
1) Truth Table guaranteed: 1.2V to 6.0V
2/10
Supply Voltage (note 1)
CC
Input Voltage 0 to V
I
Control Input Voltage
IC
Output Voltage 0 to V
O
Operating Temperature
op
Input Rise and Fall Time Control Input for Vcc= 2.3V - 3.6V 0 to 10
Input Rise and Fall Time Control Input for Vcc= 4.5V - 5.5V 0 to 5
1.65 to 5.5 V
CC
0 to 5.5 V
CC
-55 to 125 °C
V
V
ns/V
Page 3
DC S PEC IFICATIONS
Symbol Parameter
V
High Level
IH
Input Voltage
V
Low Level
IL
Input Voltage
R
Switch ON
ON
Resistance
∆R
R
FLAT
I
OFF
ON
ON
Resistance
Match
between
channels
ON
Resistance
FLATNESS
OFF State
Leakage
Current
Test Condition Value
=25°C
T
V
CC
(V)
1.65-1.95 0.75V
2.3-5.5
2.7-3.6
1.65-1.95 0.25V
2.3-5.5
2.7-3.6
4.5 VS=0V
I
=30mA
S
=2.4V
V
S
I
=30mA
S
= 4.5V
V
S
I
=30mA
S
I
=24mA
S
V
I
=24mA
S
I
S
V
S
I
S
I
S
V
=1.65V
S
I
S
=3.15V
S
=30mA
I
S
S
I
=24mA
S
S
I
S
=1.15V
S
I
S
=0V
S
=3V
S
=0V
S
=8mA
=2.3V
=8mA
=0V
S
=4mA
=4mA
=2.1V
=1.6V
=8mA
=4mA
CC
3.0 V
2.3 V
1.65 V
4.5 V
3.0 V
2.3 V
1.65 V
5.0 VS=0 to V
A
Min. Typ. Max. Min. Max. Min. Max.
CC
0.7V
CC
222
CC
0.3V
CC
0.8 0.8 0.8
4.4 7 7 9
4.9 12 12 14.5
6.1 15 15 18
5.2 9 9 11
7.8 20 20 24
6.5 12 12 14.5
9.6 30 30 36
9.0 20 20 24
14 50 50 60
0.10
0.10
0.20
0.35
3
IS=30mA
3.3 V
=0 to V
S
CC
6
IS=24mA
2.5 V
=0 to V
S
CC
14
IS=8mA
1.8 V
=0toV
S
CC
80
IS=4mA
1.65-1.95
VS=0 to V
CC
±0.05 ±0.1 ± 1 ±10 µA
-40 to 85°C -55 to 125°C
0.75V
0.7V
CC
CC
0.25V
0.3V
CC
CC
0.75V
0.7V
CC
CC
STG3157
0.25V
CC
0.3V
CC
Unit
V
V
Ω
Ω
Ω
3/10
Page 4
STG3157
Test Condition Value
=25°C
Symbol Parameter
V
CC
(V)
I
IN
Input
Leakage
0 - 5.5 VIN= 0 to 5.5V ±0.05 ±0.1 ± 1 ±10 µA
Current
I
CC
Quiescent
Supply
5.5 V
IN=VCC
or
GND
Current (All
Channel ON
or OFF)
AC ELECT RICAL CHARACTERISTICS (CL= 50pF, RL= 500Ω)
Test Condition Value
Symbol Parameter
t
LH,tHL
t
PZH,tPZL
t
PLZ,tPHZ
Propagation Delay 1.65-1.95
Output Enable
Time (D to S
Output Disable
Time (D to S
Break Before Make
t
D
Time Delay
Charge injection 5 23
Q
)
n
)
n
V
CC
(V)
2.3-2.7 1.2 1.2 1.8
3.0-3.6 0.8 0.8 1.2
V
=OPEN
I
4.5-5.5 0.3 0.3 0.5
1.65-1.95 7 15 7 20 7 27
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
1.65-1.95 3 10 3 13 3 16
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
1.65-5.5
3.3 19
T
A
Min. Typ. Max. Min. Max. Min. Max.
1110µA
= 25°C
T
A
Min. Typ. Max. Min. Max. Min. Max.
0.5 0.5 0.5 ns
-40 to 85°C -55 to 125°C
-40 to 85°C -55 to 125°C
Unit
Unit
ns
ns
ns
pC
ANALOG SWITCH CHARACTERISTICS (C
Test Condition Value
Symbol Parameter
OIRR Off Isolation 1.65-5.5 R
Xtalk Crosstalk 1.65-5.5 R
BW -3dB Bandwidth 1.65-5.5 R
C
C
Control Pin Input
IN
Capacitance
Sn Port
Sn
Capacitance
D PortCapacitance
C
when Switch is
D
Enabled
4/10
V
CC
(V)
f= 10MHz
f= 10MHz
5.0
5.0
= 5pF, RL=50Ω,TA=25°C)
L
= 25°C
T
A
Min. Typ. Max. Min. Max. Min. Max.
=50Ω
L
=50Ω
L
=50Ω
L
-57 dB
-54 dB
250 MHz
5
f= 1MHz 13
f= 1MHz 21
-40 to 85°C -55 to 125°C
Unit
pF
Page 5
STG3157
ON RESISTANCE
ON L EAKAGE
OFF ISOLATION
BANDWIDTH
OFF L EAKAGE
CHANNEL TO CHANNEL CROSSTALK
5/10
Page 6
STG3157
TEST CIRCUIT
TEST SWITCH
t
PLH,tPHL
t
PZL,tPLZ
t
PZH,tPHZ
CL= 50pF or equivalent (includes jig and probe capacitance)
R
=500Ωor equivalent
L=R1
RT=Z
of pulse generator (typically 50Ω)
OUT
Open
V
CC
GND
SWITCHING TIMES WAVEFORM
6/10
Page 7
SWITCHING TIMES WAVEFORM
STG3157
BREAK BEFORE MAKE TIME DEL AY
CHARGE I NJE CT ION (V
GEN
=0V, R
GEN
=0Ω,RL=1MΩ,CL=100pF)
7/10
Page 8
STG3157
SOT323-6L MECHANICAL DATA
mm. mils
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 0.80 1.10 31.5 43.3
A1 0.00 0.10 0.0 3.9
A2 0.80 1.00 31.5 39.4
b 0.15 0.30 5.9 11.8
C 0.10 0.18 3.9 7.1
D 1.80 2.20 70.9 86.6
E 1.80 2.40 70.9 94.5
E1 1.15 1.35 45.3 53.1
e0.65 25.6
e1 1.3 51.2
L 0.10 0.30 3.9 11.8
8/10
Page 9
Tape & Reel SOT323-xL MECHANICAL DATA
STG3157
DIM.
MIN. TYP MAX. MIN. TYP. MAX.
A 175 180 185 6.889 7.086 7.283
C 12.8 13 13.2 0.504 0.512 0.519
D 20.2 0.795
N 59.5 60 60.5 2.362
T 14.4 0.567
Ao 2.25 0.088
Bo 2.7 0.106
Ko 1.2 0.047
Po 3.98 4 4.2 0.156 0.157 0.165
P 3.98 4 4.2 0.156 0.157 0.165
mm. inch
9/10
Page 10
STG3157
Information furnished is believed to be accurate and reliable. H owever, STMicroelectronics assumes no responsibilit y for t he
consequences of use of such informatio n nor for any infringement of paten ts or o ther rig hts of t hird part ies which ma y result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publicatio n are subject t o change without notice. This publication supersedes and replaces all in formation
previousl y suppl ied. STM icroel ectronics produc ts are not auth orized for use as c ritica l compone nts in l ife s upport dev ices or
systems without express written approval of STMicroelectronics.
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10/10
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