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PDF 54155 Data sheet ( Hoja de datos )
| Número de pieza | 54155 | |
| Descripción | Dual 2-Line to 4-Line Decoders/Demultiplexers | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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February 1993
DM54155 DM74155 Dual 2-Line to 4-Line
Decoders Demultiplexers
General Description
These TTL circuits feature dual 1-line-to-4-line demultiplex-
ers with individual strobes and common binary-address in-
puts in a single 16-pin package When both sections are
enabled by the strobes the common address inputs se-
quentially select and route associated input data to the ap-
propriate output of each section The individual strobes per-
mit activating or inhibiting each of the 4-bit sections as de-
sired Data applied to input C1 is inverted at its outputs and
data applied at C2 is true through its outputs The inverter
following the C1 data input permits use as a 3-to-8-line de-
coder or 1-to-8-line demultiplexer without external gating
Input clamping diodes are provided on these circuits to mini-
mize transmission-line effects and simplify system design
Features
Y Applications
Dual 2-to-4-line decoder
Dual 1-to-4-line demultiplexer
3-to-8-line decoder
1-to-8-line demultiplexer
Y Individual strobes simplify cascading for decoding or
demultiplexing larger words
Y Input clamping diodes simplify system design
Connection Diagram and Function Tables
Dual-In-Line Package
Select
BA
XX
LL
LH
HL
HH
XX
2-Line-to-4-Line Decoder or
1-Line-to-4-Line Demultiplexer
Inputs
Outputs
Strobe Data
G1 C1 1Y0 1Y1 1Y2
H X HHH
L H LHH
L H HLH
L H HHL
L H HHH
X L HHH
1Y3
H
H
H
H
L
H
TL F 6549 – 1
Order Number DM54155J DM54155W or DM74155N
See NS Package Number J16A N16A or W16A
Inputs
Outputs
Select Strobe Data
B A G2
C2 2Y0 2Y1 2Y2 2Y3
XX
LL
LH
HL
HH
XX
H
L
L
L
L
X
X HHHH
L LHHH
L HLHH
L HHLH
L HHHL
H HHHH
C e inputs C1 and C2 connected together
G e inputs G1 and G2 connected together
H e high level L e low level X e don’t care
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 B A G 2Y0 2Y1 2Y2 2Y3 1Y0 1Y1 1Y2 1Y3
X XX
L LL
L LH
L HL
L HH
H LL
H LH
H HL
H HH
H
L
L
L
L
L
L
L
L
HHHHHHHH
L HHHHHHH
H L HHHHHH
HH L HHHHH
HHH L HHHH
HHHH L HHH
HHHHH L HH
HHHHHH L H
HHHHHHH L
C1995 National Semiconductor Corporation TL F 6549
RRD-B30M105 Printed in U S A
1 page  
Physical Dimensions inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J)
Order Number DM54155J
NS Package Number J16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74155N
NS Package Number N16E
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet 54155.PDF ] | |
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