CD54AC138_14 Datasheet, PDF (2/17 Pages) Texas Instruments – 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS

CD54AC138, CD74AC138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SCHS328A – JANUARY 2003 – REVISED FEBRUARY 2003
FUNCTION TABLE
ENABLE INPUTS
SELECT INPUTS
OUTPUTS
G1 G2A G2B C
B
A
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X
H
X
X
X
X
H
H
H
H
H
H
H
H
X
X
H
X
X
X
H
H
H
H
H
H
H
H
L
X
X
X
X
X
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
L
H
H
H
H
H
H
H
L
L
L
H
L
H
H
L
H
H
H
H
H
H
L
L
L
H
H
H
H
H
L
H
H
H
H
H
L
L
H
L
L
H
H
H
H
L
H
H
H
H
L
L
H
L
H
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
H
H
H
H
H
H
H
H
H
L
logic diagram (positive logic)
A1
15 _Y0
14 _Y1
Select
Inputs
B2
3
C
13 _Y2
12 _Y3
11
Y4
Data
Outputs
10 _Y5
Enable
Inputs
4
G2A
G2B ⁵
6
G1
9 _Y6
7
Y7
2
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