74HC137 データシートの表示（PDF） - Philips Electronics
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74HC137 Datasheet PDF : 8 Pages
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Philips Semiconductors
3-to-8 line decoder/demultiplexer with
address latches; inverting
Product specification
74HC/HCT137
FUNCTION TABLE
LE
H
X
X
L
L
L
L
L
L
L
L
E1
L
H
X
L
L
L
L
L
L
L
L
INPUTS
E2
H
X
L
H
H
H
H
H
H
H
H
A0
X
X
X
L
H
L
H
L
H
L
H
Notes
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
H
H
L
H
H
H
H
H
H
H
Y1
Y2
H
H
H
H
H
H
L
H
H
L
H
H
H
H
H
H
H
H
H
H
OUTPUTS
Y3
Y4
stable
H
H
H
H
H
H
H
H
H
H
L
H
H
L
H
H
H
H
H
H
Y5
Y6
Y7
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
L
H
H
H
L
December 1990
Fig.5 Logic diagram.
4
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