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DM74LS138N View Datasheet(PDF) - Fairchild Semiconductor

Part NameDescriptionManufacturer
DM74LS138N Decoder/Demultiplexer Fairchild
Fairchild Semiconductor Fairchild
DM74LS138N Datasheet PDF : 7 Pages
1 2 3 4 5 6 7
Connection Diagrams
DM74LS138
DM74LS139
Function Tables
DM74LS138
DM74LS139
Inputs
Enable
Select
Outputs
Inputs
Enable
Select
Outputs
G1 G2 (Note 1) C B A YO Y1 Y2 Y3 Y4 Y5 Y6 Y7
G
B A Y0 Y1 Y2 Y3
X
H
XXX H H H H H H H H
H
XX
H
H
H
H
L
X
XXX H H H H H H H H
L
LL
L
H
H
H
H
L
LLL L H H H H H H H
L
LH
H
L
H
H
H
L
LLH H L H H H H H H
L
HL
H
H
L
H
H
L
LHL H H L H H H H H
L
HH
H
H
H
L
H
L
LHH H H H L H H H H
H
L
HLL H H H H L H H H
H
L
H L H H H H H H L H H H = HIGH Level
H
L
HH L H
HHHHH L H
L = LOW Level
X = Don’t Care
H
L
HHH H H H H H H H L
Note 1: G2 = G2A + G2B
Logic Diagrams
DM74LS138
DM74LS139
www.fairchildsemi.com
2
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