© 2000 Fairchild Semiconductor Corporation

DS010170

www.fairchildsemi.com

March 1989

Revised March 2000

DM74LS33

Quad 2-Input NOR Buffer with Open-Collector Outputs

General Description

This device contains four independent gates each of which

perform the logic NOR function. Outputs are open-collec-

tor.

Ordering Code:

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

Connection Diagram

Function Table

Y

= A + B

H

= HIGH Logic Level

L

= LOW Logic Level

Order Number

Package Number

Package Description

DM74LS33M

M14A

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

DM74LS33N

N14A

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

Inputs

Output

AB

Y

LL

H

LH

L

HL

L

HH

L