54AC521

8-Bit Identity Comparator

General Description

The AC/ACT521 is an expandable 8-bit comparator. It com-

pares two words of up to eight bits each and provides a LOW

output when the two words match bit for bit. The expansion

input I

Features

n Compares two 8-bit words in 6.5 ns typ

n Expandable to any word length

n Outputs source/sink 24 mA

n ACT521 has TTL-compatible inputs

n Standard microcircuit Drawing (SMD)

54AC521: 5962-90985

54ACT521: 5962-89793

Logic Symbols

Connection Diagram

Pin Descriptions

Pin Names

Description

Word A Inputs

Word B Inputs

Expansion or Enable Input

Identity Output

DS100291-1

IEEE/IEC

DS100291-4

Pin Assignment

for DIP and CERPACK

DS100291-2

Pin Assignment

for LCC

DS100291-3

September 1998

© 1998 National Semiconductor Corporation

DS100291

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