74LS155 Ver la hoja de datos (PDF) - Fairchild Semiconductor
Número de pieza
componentes Descripción
Fabricante
74LS155 Datasheet PDF : 6 Pages
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Function Tables
3-Line-to-8-Line Decoder or 1-Line-to-8-Line Demultiplexer
Inputs
Outputs
Select
Strobe
Or Data
(0)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
C (Note 1) B A G (Note 2)
2Y0
2Y1
2Y2
2Y3
1Y0
1Y1
1Y2
1Y3
X
XX
H
H
H
H
H
H
H
H
H
L
LL
L
L
H
H
H
H
H
H
H
L
LH
L
H
L
H
H
H
H
H
H
L
HL
L
H
H
L
H
H
H
H
H
L
HH
L
H
H
H
L
H
H
H
H
H
LL
L
H
H
H
H
L
H
H
H
H
LH
L
H
H
H
H
H
L
H
H
H
HL
L
H
H
H
H
H
H
L
H
H
HH
L
H
H
H
H
H
H
H
L
2-Line-to-4-Line Decoder or 1-Line-to-4-Line Demultiplexer
Select
BA
XX
LL
LH
HL
HH
XX
Inputs
Strobe
G1
H
L
L
L
L
X
Data
C1
X
H
H
H
H
L
Outputs
1Y0 1Y1 1Y2
H
H
H
L
H
H
H
L
H
H
H
L
H
H
H
H
H
H
H = HIGH level
L = LOW level
X = don’t care
Note 1: C = inputs C1 and C2 connected together
Note 2: G = inputs G1 and G2 connected together
1Y3
H
H
H
H
L
H
Select
BA
XX
LL
LH
HL
HH
XX
Inputs
Strobe
G2
H
L
L
L
L
X
Data
C2
X
L
L
L
L
H
Outputs
2Y0 2Y1 2Y2 2Y3
H
H
H
H
L
H
H
H
H
L
H
H
H
H
L
H
H
H
H
L
H
H
H
H
Logic Diagram
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