54AC251

General Description

The ’AC/’ACT251 is a high-speed 8-input digital multiplexer.

It provides, in one package, the ability to select one bit of

data from up to eight sources. It can be used as universal

function generator to generate any logic function of four vari-

ables. Both true and complementary outputs are provided.

Features

n Multifunctional capability

n On-chip select logic decoding

n Inverting and noninverting TRI-STATE outputs

n Outputs source/sink 24 mA

n ’ACT251 has TTL-compatible inputs

n Standard Military Drawing (SMD)

— ’AC251: 5962-87692

— ’ACT251: 5962-89599

Logic Symbols

Pin Names

Description

S

Select Inputs

OE

TRI-STATE Output Enable Input

I

Multiplexer Inputs

Z

TRI-STATE Multiplexer Output

Z

Complementary TRI-STATE Multiplexer

Output

DS100284-1

IEEE/IEC

DS100284-2

August 1998

© 1998 National Semiconductor Corporation

DS100284

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