74HC20 Philips, 74HC20 Datasheet - Page 4
74HC20
Manufacturer Part Number
74HC20
Description
Dual 4-input NAND gate
Manufacturer
Philips
Datasheet
1.74HC20.pdf
(6 pages)
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Philips Semiconductors
December 1990
Dual 4-input NAND gate
Fig.6 HCT logic diagram (one gate).
Fig.4 Functional diagram.
4
FUNCTION TABLE
Notes
1. H = HIGH voltage level
nA
H
X
X
X
L
L = LOW voltage level
X = don’t care
Fig.5 HC logic diagram (one gate).
nB
X
X
X
H
L
INPUTS
nC
H
X
X
X
L
nD
X
X
X
H
L
74HC/HCT20
Product specification
OUTPUT
nY
H
H
H
H
L