54AC280

9-Bit Parity Generator/Checker

General Description

The ’AC280 is a high-speed parity generator/checker that

accepts nine bits of input data and detects whether an even

or an odd number of these inputs is HIGH. If an even number

of inputs is HIGH, the Sum Even output is HIGH. If an odd

number is HIGH, the Sum Even output is LOW. The Sum

Odd output is the complement of the Sum Even output.

Features

n 9-bit width for memory applications

n Standard Microcircuit Drawing (SMD) 5962-92201

Logic Symbols

Pin

Names

Description

I

Data Inputs

∑

O

Odd Parity Output

∑

E

Even Parity Output

Connection Diagrams

Truth Table

Number of

Outputs

HIGH Inputs

I

0, 2, 4, 6, 8

H

L

1, 3, 5, 7, 9

L

H

H = HIGH Voltage Level

L = LOW Voltage Level

DS100359-1

IEEE/IEC

DS100359-4

Pin Assignment for

DIP and Flatpak

DS100359-2

Pin Assignment for LCC

DS100359-3

September 1998

© 1998 National Semiconductor Corporation

DS100359

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