74HC238 查看數據表（PDF） - Philips Electronics
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74HC238 Datasheet PDF : 7 Pages
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Philips Semiconductors
3-to-8 line decoder/demultiplexer
Product specification
74HC/HCT238
Fig.4 Functional diagram.
Fig.5 Logic diagram.
FUNCTION TABLE
E1
H
X
X
L
L
L
L
L
L
L
L
E2
X
H
X
L
L
L
L
L
L
L
L
INPUTS
E3
X
X
L
H
H
H
H
H
H
H
H
A0
X
X
X
L
H
L
H
L
H
L
H
Note
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
A1
X
X
X
L
L
H
H
L
L
H
H
A2
X
X
X
L
L
L
L
H
H
H
H
Y0
L
L
L
H
L
L
L
L
L
L
L
Y1
L
L
L
L
H
L
L
L
L
L
L
Y2
L
L
L
L
L
H
L
L
L
L
L
OUTPUTS
Y3
L
L
L
L
L
L
H
L
L
L
L
Y4
L
L
L
L
L
L
L
H
L
L
L
Y5
Y6
Y7
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
L
L
H
December 1990
4
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