1/10September 2002
■HIGH SPEED:
tPD = 0.3ns (MAX.) at VCC =4.5V
t
PD = 0.8ns (MAX.) at VCC =3.0V
t
PD = 1.2ns (MAX.) at VCC =2.3V
■VERY LOW POWER DISSIPATION:
ICC =1µA(MAX.) at TA=85°C
■LOW "ON" RESISTANCE VIN=0V:
RON=7Ω(MAX.TA=85°C) atVCC=4.5V
RON =9Ω(MAX. TA=85°C) at VCC =3.0V
■WIDE OPERATING VOLTAGE RANGE:
VCC (OPR) = 1.65V to 5.5V SINGLE SUPPLY
■TTL THRESOLD ON CONTROL INPUT at
VCC = 2.7 to 3.6V
■PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 3157
■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 C2MOS
tecnology. It designed to operate from 1.65V to
5.5V, making this device ideal for portable
applications.
It offers very low ON-Resistance (<9Ω)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
AbsoluteMaximum Ratings are those values beyond whichdamage 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
5VCC Positive Supply Voltage
2 GND Ground (0V)
IN SWITCH S1 SWITCH S2
H ON OFF(*)
L OFF(*) ON
Symbol Parameter Value Unit
VCC Supply Voltage -0.5 to +7.0 V
VIDC Input Voltage -0.5 to VCC + 0.5 V
VIC DC Control Input Voltage -0.5 to Vcc + 0.5 V
VODC Output Voltage -0.5 to VCC + 0.5 V
IIKC DC Input Diode Current on control pin (VIN<0V) ± 50 mA
IIK DC Input Diode Current (VIN< 0V) ± 50 mA
IOK DC Output Diode Current ±20 mA
IODC Output Current + 128 mA
ICC or IGND DC VCC or Ground Current ±100 mA
Tstg Storage Temperature -65 to +150 °C
TLLead Temperature (10 sec) 300 °C
Symbol Parameter Value Unit
VCC Supply Voltage (note 1) 1.65 to 5.5 V
VIInput Voltage 0 to VCC V
VIC Control Input Voltage 0 to 5.5 V
VOOutput Voltage 0 to VCC V
Top 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
3/10
DC SPECIFICATIONS
Symbol Parameter
Test Condition Value
Unit
VCC
(V)
TA=25°C -40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
VIH High Level
Input Voltage
1.65-1.95 0.75V
CC
0.75V
CC
0.75V
CC
V
2.3-5.5
0.7V
CC
0.7V
CC
0.7V
CC
2.7-3.6
222
V
IL Low Level
Input Voltage
1.65-1.95 0.25V
CC
0.25V
CC
0.25V
CC
V
2.3-5.5
0.3V
CC
0.3V
CC
0.3V
CC
2.7-3.6
0.8 0.8 0.8
RON Switch ON
Resistance 4.5 VS=0V
IS=30mA 4.4 7 7 9
Ω
VS=2.4V
IS=30mA 4.9 12 12 14.5
VS= 4.5V
IS=30mA 6.1 15 15 18
3.0 VS=0V
IS=24mA 5.2 9 9 11
VS=3V
IS=24mA 7.8 20 20 24
2.3 VS=0V
IS=8mA 6.5 12 12 14.5
VS=2.3V
IS=8mA 9.6 30 30 36
1.65 VS=0V
IS=4mA 9.0 20 20 24
VS=1.65V
IS=4mA 14 50 50 60
∆RON ON
Resistance
Match
between
channels
4.5 VS=3.15V
IS=30mA 0.10
Ω
3.0 VS=2.1V
IS=24mA 0.10
2.3 VS=1.6V
IS=8mA 0.20
1.65 VS=1.15V
IS=4mA 0.35
RFLAT ON
Resistance
FLATNESS
5.0 VS=0 to VCC
IS=30mA 3
Ω
3.3 VS=0 to VCC
IS=24mA 6
2.5 VS=0 to VCC
IS=8mA 14
1.8 VS=0toVCC
IS=4mA 80
IOFF OFF State
Leakage
Current
1.65-1.95
VS=0 to VCC ±0.05 ±0.1 ±1±10 µA
STG3157
4/10
AC ELECTRICAL CHARACTERISTICS (CL= 50pF, RL= 500Ω)
ANALOG SWITCH CHARACTERISTICS (CL= 5pF, RL=50Ω,T
A
=25°C)
IIN Input
Leakage
Current
0 - 5.5 VIN= 0 to 5.5V ±0.05 ±0.1 ±1±10 µA
ICC Quiescent
Supply
Current (All
Channel ON
or OFF)
5.5 VIN=VCC or
GND 1110µA
Symbol Parameter
Test Condition Value
Unit
VCC
(V)
TA= 25°C -40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
tLH, tHL Propagation Delay 1.65-1.95
VI=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
tPZH, tPZL Output Enable
Time (D to Sn)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
tPLZ, tPHZ Output Disable
Time (D to Sn)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
tDBreak Before Make
Time Delay 1.65-5.5 0.5 0.5 0.5 ns
QCharge injection 5 23 pC
3.3 19
Symbol Parameter
Test Condition Value
Unit
VCC
(V)
TA= 25°C -40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
OIRR Off Isolation 1.65-5.5 RL=50Ω
f= 10MHz -57 dB
Xtalk Crosstalk 1.65-5.5 RL=50Ω
f= 10MHz -54 dB
BW -3dB Bandwidth 1.65-5.5 RL=50Ω250 MHz
CIN Control Pin Input
Capacitance 5
pF
CSn Sn Port
Capacitance 5.0 f= 1MHz 13
CDD Port Capacitance
when Switch is
Enabled
5.0 f= 1MHz 21
Symbol Parameter
Test Condition Value
Unit
VCC
(V)
TA=25°C -40 to 85°C -55 to 125°C
Min. Typ. Max. Min. Max. Min. Max.
STG3157
5/10
ON RESISTANCE
ON LEAKAGE
OFF LEAKAGE
OFF ISOLATION
BANDWIDTH
CHANNEL TO CHANNEL CROSSTALK
STG3157
6/10
TEST CIRCUIT
CL= 50pF or equivalent (includes jig and probe capacitance)
RL=R
1=500Ωor equivalent
RT=Z
OUT of pulse generator (typically 50Ω)
SWITCHING TIMES WAVEFORM
TEST SWITCH
tPLH,t
PHL Open
tPZL,t
PLZ VCC
tPZH,t
PHZ GND
STG3157
7/10
SWITCHING TIMES WAVEFORM
BREAK BEFORE MAKE TIME DELAY
CHARGE INJECTION (V
GEN=0V, RGEN=0Ω,R
L
=1MΩ,C
L
=100pF)
STG3157
8/10
DIM. mm. mils
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
SOT323-6L MECHANICAL DATA
STG3157
9/10
DIM. mm. inch
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
Tape & Reel SOT323-xL MECHANICAL DATA
STG3157
10/10
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