74ALS138N 查看數據表（PDF） - Philips Electronics
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74ALS138N Datasheet PDF : 8 Pages
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Philips Semiconductors
1-of-8 decoder/demultiplexer
Product specification
74ALS138
LOGIC DIAGRAM
3
A2
A1 2
1
A0
4
E0
5
E1
6
E2
VCC = Pin 16
GND = Pin 8
15 14 13 12 11 10 9
7
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
SF00177
FUNCTION TABLE
INPUTS
OUTPUTS
E0
E1
E2
A0
A1
A2
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
H
X
X
X
X
X
H
H
H
H
H
H
H
H
X
H
X
X
X
X
H
H
H
H
H
H
H
H
X
X
L
X
X
X
H
H
H
H
H
H
H
H
L
L
H
L
L
L
L
H
H
H
H
H
H
H
L
L
H
H
L
L
H
L
H
H
H
H
H
H
L
L
H
L
H
L
H
H
L
H
H
H
H
H
L
L
H
H
H
L
H
H
H
L
H
H
H
H
L
L
H
L
L
H
H
H
H
H
L
H
H
H
L
L
H
H
L
H
H
H
H
H
H
L
H
H
L
L
H
L
H
H
H
H
H
H
H
H
L
H
L
L
H
H
H
H
H
H
H
H
H
H
H
L
H = High voltage level
L = Low voltage level
X = Don’t care
1996 Jul 03
3
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