54AC253

General Description

The ’AC/’ACT253 is a dual 4-input multiplexer with

TRI-STATE outputs. It can select two bits of data from four

sources using common select inputs. The outputs may be in-

dividually switched to a high impedance state with a HIGH

on the respective Output Enable (OE) inputs, allowing the

outputs to interface directly with bus oriented systems.

Features

n Multifunction capability

n Noninverting TRI-STATE outputs

n Outputs source/sink 24 mA

n ’ACT253 has TTL-compatible inputs

n Standard Military Drawing (SMD)

— ’AC253: 5962-87693

— ’ACT253: 5962-87761

Logic Diagrams

Pin Names

Description

I

Side A Data Inputs

I

Side B Data Inputs

S

Common Select Inputs

OE

a

Side A Output Enable Input

OE

b

Side B Output Enable Input

Z

TRI-STATE Outputs

DS100285-1

IEEE/IEC

DS100285-2

August 1998

© 1998 National Semiconductor Corporation

DS100285

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