© 2000 Fairchild Semiconductor Corporation

DS006359

www.fairchildsemi.com

May 1986

Revised March 2000

DM74LS27

Triple 3-Input NOR Gate

General Description

This device contains three independent gates each of

which performs the logic NOR function.

Ordering Code:

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

Connection Diagram

Function Table

H

= HIGH Logic Level

L

= LOW Logic Level

X

= Either LOW or HIGH Logic Level

Order Number

Package Number

Package Description

DM74LS27M

M14A

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

DM74LS27N

N14A

14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Y

= A + B + C

Inputs

Output

ABC

Y

LLL

H

XX

H

L

XH

X

L

HX

X

L