Datasheet

December 1990 4
Philips Semiconductors Product specification
Dual 4-input NAND gate 74HC/HCT20
Fig.4 Functional diagram. Fig.5 HC logic diagram (one gate).
Fig.6 HCT logic diagram (one gate).
FUNCTION TABLE
Notes
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
INPUTS OUTPUT
nA nB nC nD nY
L
X
X
X
H
X
L
X
X
H
X
X
L
X
H
X
X
X
L
H
H
H
H
H
L