74LS20

Dual 4-Input NAND Gate

General Description

This device contains two independent gates each of which

performs the logic NAND function.

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Function Table

Y

= ABCD

H

= HIGH Logic Level

L

= LOW Logic Level

X

= Either LOW or HIGH Logic Level

Order Number

Package Number

Package Description

DM74LS20M

M14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow

DM74LS20N

N14A

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

Inputs

Output

AB

CD

Y

XXX

L

H

XX

L

X

H

XL

X

X

H

L

XXX

H

HH

HH

L

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