Datasheet

September 1993 4
Philips Semiconductors Product specification
Dual 2-to-4 line decoder/demultiplexer 74HC/HCT139
FUNCTION TABLE
Notes
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
INPUTS OUTPUTS
nEnA
0
nA
1
nY
0
nY
1
nY
2
nY
3
HXXHHHH
L
L
L
L
L
H
L
H
L
L
H
H
L
H
H
H
H
L
H
H
H
H
L
H
H
H
H
L
Fig.4 Functional diagram.
Fig.5 Logic diagram (one decoder/demultiplexer).