FSA4157, FSA4157A
Low Voltage 1Ω SPDT Analog Switch
Features
General Description
■ FSA4157A features lower ICC when the S input is
FSA4157 and FSA4157A are high performance Single
Pole/Double Throw (SPDT) analog switches. Both
devices feature ultra low RON of 1.15Ω maximum at 4.5V
VCC and will operate over the wide VCC range of 1.65V to
5.5V for FSA4157, and 2.7V to 5.5V for FSA4157A. The
device is fabricated with sub-micron CMOS technology
to achieve fast switching speeds and is designed for
break-before-make operation. The select input is TTL
level compatible.
■
■
■
■
■
■
■
lower than VCC
Maximum 1.15Ω On Resistance (RON) at 4.5V VCC
0.3Ω max RON flatness at 4.5V VCC
Space saving 6-lead Pb-Free MicroPak™ and
SC70 6-lead surface mount packages
Broad VCC operating range:
– FSA4157: 1.65V to 5.5V
– FSA4157A: 2.7V to 5.5V
Fast turn-on and turn-off time
Break-before-make enable circuitry
Over-voltage tolerant TTL compatible control circuitry
The FSA4157A features very low quiescent current even
when the control voltage is lower than the VCC supply.
This feature services the mobile handset applications
very well allowing for the direct interface with baseband
processor general purpose I/Os.
Technology Description
The Fairchild Switch family derives from and embodies
Fairchild’s proven switch technology used for several
years in its 74LVXL384 (FST3384) bus switch product.
Ordering Information
Order Number
Package Product Code
Number
Top Mark
Package Description
Supplied As
FSA4157P6
MAA06A
A57
6-Lead SC70, EIAJ SC88,
1.25mm Wide
250 Units on Tape and Reel
FSA4157P6X
MAA06A
A57
6-Lead SC70, EIAJ SC88,
1.25mm Wide
3k Units on Tape and Reel
FSA4157P6X_NL(1)
MAA06A
A57
Pb-Free 6-Lead SC70,
EIAJ SC88, 1.25mm Wide
3k Units on Tape and Reel
FSA4157L6X
MAC06A
EG
Pb-Free 6-Lead MicroPak,
1.0mm Wide
5k Units on Tape and Reel
FSA4157AP6
MAA06A
B57
6-Lead SC70, EIAJ SC88,
1.25mm Wide
250 Units on Tape and Reel
FSA4157AP6X
MAA06A
B57
6-Lead SC70, EIAJ SC88,
1.25mm Wide
3k Units on Tape and Reel
FSA4157AP6X_NL(1)
MAA06A
B57
Pb-Free 6-Lead SC70,
EIAJ SC88, 1.25mm Wide
3k Units on Tape and Reel
FSA4157AL6X
MAC06A
EU
Pb-Free 6-Lead MicroPak,
1.0mm Wide
5k Units on Tape and Reel
Pb-Free package per JEDEC J-STD-020B.
Note:
1. “_NL” indicates lead-free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.
MicroPak is a trademark of Fairchild Semiconductor Corporation.
©2006 Fairchild Semiconductor Corporation
FSA4157, FSA4157A Rev. 1.0.1
1
www.fairchildsemi.com
FSA4157, FSA4157A Low Voltage 1Ω SPDT Analog Switch
March 2006
Truth Table
Pin Assignment for SC70
B1 1
6
S
Control Input(s)
Function
L
B0 Connected to A
H
B1 Connected to A
H = HIGH Logic Level
L = LOW Logic Level
GND 2
5
VCC
Pin Descriptions
B0 3
4
A
(Top View)
Pin Names
Function
A, B0, B1
Data Ports
S
Control Input
Pin Assignment for MicroPak
S 1
6
B1
VCC 2
5
GND
A 3
4
B0
(Top Through View)
2
FSA4157, FSA4157A Rev. 1.0.1
www.fairchildsemi.com
FSA4157, FSA4157A Low Voltage 1Ω SPDT Analog Switch
Analog Symbols
The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The
device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables
are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the
conditions for actual device operation.
Symbol
VCC
Parameter
Supply Voltage
DC
VIN
PD
Rating
–0.5V to +6.0V
Switch Voltage(2)
–0.5V to VCC +0.5V
DC Input Voltage(2)
–0.5V to +6.0V
DC Input Diode Current
–50mA
Switch Current
200mA
Peak Switch Current (Pulse at 1mS duration,
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