© 1999 Fairchild Semiconductor Corporation

DS009955

www.fairchildsemi.com

November 1988

Revised November 1999

74AC280

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 out-

put.

Features

s 9-bit width for memory applications

s AC280: 5962-92201

Ordering Code:

Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Logic Symbols

IEEE/IEC

Pin Descriptions

Connection Diagram

Truth Table

H

= HIGH Voltage Level

L

= LOW Voltage Level

FACT

 is a trademark of Fairchild Semiconductor Corporation.

Order Number

Package Number

Package Description

74AC280SC

M14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow Body

74AC280SJ

M14D

14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

Pin Names

Description

Data Inputs

Odd Parity Output

Even Parity Output

Number of

Outputs

HIGH Inputs

∑ Even

∑ Odd

0, 2, 4, 6, 8

H

L

1, 3, 5, 7, 9

L

H