Fairchild Semiconductor FST16233CW, FST16233MTDX, FST16233MTD, FST16233MEAX, FST16233MEA Datasheet

© 1999 Fairchild Semiconductor Corporation DS500055 www.fairchildsemi.com

September 1997
Revised December 1999

FST16233 16-Bit to 32-Bit Multiplexer/Demultiplexer Bus Switch

FST16233
16-Bit to 32-Bit Multiplexer/Demultiplexer Bus Switch

General Description

The Fairchild Swi tch FST16233 is a 1 6-bit to 32-bit hig h­speed CMOS TTL-compatible multiplexer/demultiplexer
bus switch. The low on resistance of the switch allows
inputs to be connect ed to output s with out adding prop aga­tion delay or generating additional ground bounce noise.

The device can be used in app lications where two buses
need to be addressed simu ltaneously. The FST16233 can
be used as two 8-bit to 16-b it mult iplexer s or as o ne 16- bit
to 32-bit multiplexer.

Two select (SEL

1

, SEL0) and two test (TEST0, TEST1)
inputs provide switch enable and multiplexer select control.
The FST16233 is designed to prevent through-current

when switching buses.

Features

■ 4Ω switch connection between two ports.

■ Minimal propagation delay through the switch.

■ Low l

CC

.

■ Zero bounce in flow-through mode.

■ Control inputs compatible with TTL level.

Ordering Code:

Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering code.

Logic Diagram

Order Number Package Number Package Description

FST16233MEA MS56A 56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300 Wide
FST16233MTD MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

www.fairchildsemi.com 2

FST16233

Connection Diagram Pin Descriptions

Tr uth Table

Pin Name Description

SEL

0

, SEL

1

Select Inputs

TEST

0

, TEST

1

Test Inputs

ABus A

B

1

, B

2

Bus B

Inputs

Function

SEL TEST

LL A = B

1

HL A = B

2

XHA = B1 and A = B

2