March 2008
FSA1256(A) / FSA1257(A) / FSA1258(A)
Low-RON Low-Voltage, Dual SPST Analog Switch with
Low-ICCT “A” Option
Features
Description
The FSA1256, FSA1256A, FSA1257, FSA1257A,
FSA1258, and FSA1258A are high performance dual
Single Pole/Single Throw (SPST) analog switches. All
devices feature ultra low RON of 1.1Ω maximum at 4.5V
VCC. The FSA1256, FSA1257, and FSA1258 operate
over a wide VCC range of 1.65V to 5.5V. The FSA1256A,
FSA1257A, and FSA1258A operation range is 2.7V to
5.5V. These devices are fabricated with sub-micron
CMOS technology to achieve fast switching speeds and
are designed for break-before-make operation. The
select input is TTL level compatible. The FSA1256 and
FSA1256A feature two Normally Open (NO) switches.
The FSA1257 and FSA1257A feature two Normally
Closed (NC) switches. The FSA1258 and FSA1258A
have one NO switch and one NC switch.
FSA1256A, FSA1257A, FSA1258A feature low ICCT
when S Input is lower than VCC
Maximum 1.1Ω On Resistance (RON) for 4.5V
supply
0.4Ω max RON flatness for 4.5V supply
Space saving Pb-Free MicroPak™ packaging
Broad VCC operating range:
FSA1256, FSA1257, FSA1258: 1.65V to 5.5V
FSA1256A, FSA1257A, FSA1258A: 2.7V to 5.5V
Fast turn-on and turn-off time
FSA1258, FSA1258A feature break-before-make
enable circuitry
Over-voltage tolerant TTL compatible control input
IMPORTANT NOTE:
For additional performance information, please contact
analogswitch@fairchildsemi.com.
Applications
Cell Phone, PDA, Digital Camera, and Notebook
LCD Monitor, TV, and Set-Top Box
Ordering Information
Part Number
Top Mark
Package Description
Packing Method
FSA1256L8X
FSA1256AL8X
FSA1257L8X
FSA1257AL8X
FSA1258L8X
FSA1258AL8X
EB
FN
EC
FP
ED
FS
8-Lead, MicroPak™, 1.6mm Wide
8-Lead, MicroPak™, 1.6mm Wide
8-Lead, MicroPak™, 1.6mm Wide
8-Lead, MicroPak™, 1.6mm Wide
8-Lead, MicroPak™, 1.6mm Wide
8-Lead, MicroPak™, 1.6mm Wide
5000 Units Tape and Reel
5000 Units Tape and Reel
5000 Units Tape and Reel
5000 Units Tape and Reel
5000 Units Tape and Reel
5000 Units Tape and Reel
All packages are lead free per JEDEC: J-STD-020B standard.
MicroPak™ is a trademark of Fairchild Semiconductor Corporation.
© 2004 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FSA1256(A) / FSA1257(A) / FSA1258(A) Rev. 1.0.5