© 2000 Fairchild Semiconductor Corporation

DS006277

www.fairchildsemi.com

April 1984

Revised March 2000

DM74AS21

Dual 4-Input AND Gate

General Description

This device contains two independent 4-input gates, each

of which performs the logic AND function.

Features

s Switching specifications at 50 pF

s Switching specifications guaranteed over full

s Advanced oxide-isolated, ion-implanted Schottky

TTL process

s Functionally and pin for pin compatible with Schottky,

low power Schottky, and advanced low power Schottky

TTL counterpart

s Improved AC performance over Schottky, low power

Schottky and advanced low power Schottky counter-

parts

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

DM74AS21M

M14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow

DM74AS21N

N14A

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

Inputs

Output

ABCD

Y

HHHH

H

L

XXX

L

XL

X

X

L

XX

L

X

L

XXX

L

L