54LS21 DM54LS21 DM74LS21 Dual 4-Input AND Gates
June 1989
54LS21 DM54LS21 DM74LS21 Dual 4-Input AND Gates
General Description
This device contains two independent gates each of which
performs the logic AND function
Features
Y
Alternate Military Aerospace device (54LS21) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6356 鈥?1
Order Number 54LS21DMQB 54LS21FMQB 54LS21LMQB
DM54LS21J DM54LS21W DM74LS21M or DM74LS21N
See NS Package Number E20A J14A M14A N14A or W14B
Function Table
Y
e
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
e
High Logic Level
L
e
Low Logic Level
X
e
Either Low or High Logic Level
C
1995 National Semiconductor Corporation
TL F 6356
RRD-B30M105 Printed in U S A