DM74ALS21A Dual 4-Input AND Gate
September 1986
Revised February 2000
DM74ALS21A
Dual 4-Input AND Gate
General Description
This device contains two independent gates, each of which
performs the logic AND function.
Features
s
Switching specifications at 50 pF
s
Switching specifications guaranteed over full tempera-
ture and V
CC
range
s
Advanced oxide-isolated, ion-implanted Schottky TTL
process
s
Functionally and pin for pin compatible with Schottky
and low power Schottky TTL counterpart
s
Improved AC performance over Schottky and low power
Schottky counterparts
Ordering Code:
Order Number
DM74ALS21AM
DM74ALS21AN
Package Number
M14A
N14A
Package Description
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Connection Diagram
Function Table
Y
=
ABCD
Inputs
A
X
X
X
L
H
B
X
X
L
X
H
C
X
L
X
X
H
D
L
X
X
X
H
Output
Y
L
L
L
L
H
H
=
HIGH Logic Level
L
=
LOW Logic Level
X
=
Either LOW or HIGH Logic Level
漏 2000 Fairchild Semiconductor Corporation
DS006185
www.fairchildsemi.com