DM74LS20 Dual 4-Input NAND Gate
June 1986
Revised March 2000
DM74LS20
Dual 4-Input NAND Gate
General Description
This device contains two independent gates each of which
performs the logic NAND function.
Ordering Code:
Order Number
DM74LS20M
DM74LS20N
Package Number
M14A
N14A
Package Description
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 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
H
H
H
H
L
H
=
HIGH Logic Level
L
=
LOW Logic Level
X
=
Either LOW or HIGH Logic Level
漏 2000 Fairchild Semiconductor Corporation
DS006355
www.fairchildsemi.com