TL/F/6356
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/6356–1
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 Output
ABCD Y
XXXL L
XXLX L
XLXX L
LXXX L
HHHH H
HeHigh Logic Level
L e Low Logic Level
X e Either Low or High Logic Level
C
1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.