CD74AC139 Datasheet, PDF (2/7 Pages) Texas Instruments – Dual 2-to-4-Line Decoder/Demultiplexer

CD74AC139, CD74ACT139
Functional Diagram
2
1A0
3
1A1
1
1E
14
2A0
13
2A1
15
2E
DECODER
1
DECODER
2
4
1Y0
5
1Y1
6
1Y2
7
1Y3
12
2Y0
11
2Y1
10
2Y2
9
2Y3
GND = 8
V_CC = 16
TRUTH TABLE
INPUTS
ENABLE
SELECT
OUTPUTS
E
A1 A0 Y3 Y2 Y1 Y0
L
L
L
H
H
H
L
L
L
H
H
H
L
H
L
H
L
H
L
H
H
L
H
H
L
H
H
H
H
X
X
H
H
H
H
X = Don’t Care
2