Datasheet

 
    
SCLS066D − MARCH 1982 − REVISED SEPTEMBER 2003
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description/ordering information (continued)
The ’HCT139 devices comprise two individual 2-line to 4-line decoders in a single package. The active-low
enable (G
) input can be used as a data line in demultiplexing applications. These decoders/demultiplexers
feature fully buffered inputs, each of which represents only one normalized load to its driving circuit.
FUNCTION TABLE
INPUTS
OUTPUTS
G
SELECT
OUTPUTS
G
B A Y0 Y1 Y2 Y3
H X X H H H H
L L LLHHH
L L HHLHH
L H LHHLH
L H H H H H L
logic diagram (positive logic)
1G
1Y0
1Y1
1Y2
1Y3
2Y0
2Y1
2Y2
2Y3
1A
1B
2G
2A
2B
Pin numbers shown are for the D, DB, J, N, PW, and W packages.
1
2
3
15
14
13
4
5
6
7
12
11
10
9