March 2004
Revised April 2005
FSA1256 • FSA1256A • FSA1257 • FSA1257A •
FSA1258 • FSA1258A
Low R Low Voltage Dual SPST Analog Switch
ON
with Low I
“A” Option
CCT
General Description
Features
■ FSA1256A, FSA1257A, FSA1258A feature low ICCT
The FSA1256, FSA1256A, FSA1257, FSA1257A,
FSA1258, and FSA1258A are high performance dual Sin-
gle Pole/Single Throw (SPST) analog switches. All devices
feature ultra low RON of 1.1 maximum at 4.5V VCC. The
when S Input is lower than VCC
■ Maximum 1.1 On Resistance (RON) for 4.5V supply
■ 0.4 max RON flatness for 4.5V supply
FSA1256, FSA1257, and FSA1258 operate over a wide
VCC range of 1.65V to 5.5V. The FSA1256A, FSA1257A,
■ Space saving Pb-Free MicroPak packaging
■ Broad VCC operating range:
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 Nor-
mally 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.
• 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
Ordering Code:
Product
Order
Package
Code
Package Description
Supplied As
Number
Number Top Mark
FSA1256L8X
FSA1256AL8X
FSA1257L8X
FSA1257AL8X
FSA1258L8X
FSA1258AL8X
MAC08A
MAC08A
MAC08A
MAC08A
MAC08A
MAC08A
EB
FN
EC
FP
ED
FS
Pb-Free 8-Lead MicroPak, 1.6 mm Wide
Pb-Free 8-Lead MicroPak, 1.6 mm Wide
Pb-Free 8-Lead MicroPak, 1.6 mm Wide
Pb-Free 8-Lead MicroPak, 1.6 mm Wide
Pb-Free 8-Lead MicroPak, 1.6 mm Wide
Pb-Free 8-Lead MicroPak, 1.6 mm Wide
5K Units on Tape and Reel
5K Units on Tape and Reel
5K Units on Tape and Reel
5K Units on Tape and Reel
5K Units on Tape and Reel
5K Units on Tape and Reel
Pb-Free package per JEDEC J-STD-020B.
MicroPak is a trademark of Fairchild Semiconductor Corporation.
© 2005 Fairchild Semiconductor Corporation
DS500883
www.fairchildsemi.com