© 2002 Fairchild Semiconductor Corporation

DS500724

www.fairchildsemi.com

May 2002

Revised July 2002

FST33X257

24:12 Multiplexer/Demultiplexer Bus Switch

General Description

The Fairchild Switch FST33X257 is a 24:12 high-speed

CMOS

TTL-compatible

multiplexer/demultiplexer

bus

switch. The low On Resistance of the switch allows inputs

to be connected to outputs without adding propagation

delay or generating additional ground bounce noise.

is OPEN and a high-impedance state exists between the

two ports.

Features

s 4

Ω switch connection between two ports

s Minimal propagation delay through the switch

s Zero bounce in flow-through mode

s Control inputs compatible with TTL level

Ordering Code:

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Order Number

Package

Number

Package Description

FST33X257QSP

MQA48A

48-Lead Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide