© 2000 Fairchild Semiconductor Corporation

DS010169

www.fairchildsemi.com

March 1989

Revised March 2000

DM74LS28

Quad 2-Input NOR Buffer

General Description

The DM74LS28 contains four independent gates each of

which perform 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

Truth Table

Y

= A+B

H

= HIGH logic level

L

= LOW logic level

Order Number

Package Number

Package Description

DM74LS28M

M14A

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

Inputs

Output

AB

Y

LL

H

LH

L

HL

L

HH

L