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54LS42 Scheda tecnica(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte 54LS42
Spiegazioni elettronici  Decimal Decoders
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

54LS42 Scheda tecnica(HTML) 1 Page - National Semiconductor (TI)

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TLF6365
June 1989
54LS42DM54LS42DM74LS42 BCDDecimal Decoders
General Description
These BCD-to-decimal decoders consist of eight inverters
and ten four-input NAND gates The inverters are connect-
ed in pairs to make BCD input data available for decoding
by the NAND gates Full decoding of input logic ensures
that all outputs remain off for all invalid (10 – 15) input condi-
tions
Features
Y
Diode clamped inputs
Y
Also for applications as 4-line-to-16-line decoders 3-
line-to-8-line decoders
Y
All outputs are high for invalid input conditions
Y
Alternate MilitaryAerospace device (54LS42) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
TLF6365 – 1
Order Number 54LS42DMQB 54LS42FMQB
DM54LS42J DM54LS42W DM74LS42M or DM74LS42N
See NS Package Number J16A M16A N16E or W16A
Function Table
No
BCD Inputs
Decimal Outputs
D
C
B
A
0123456789
0
L
L
L
L
L
HHHHHHHHH
1
L
L
L
HH
L
H
HHHHHHH
2
L
L
H
L
H
H
L
HHHHHHH
3
L
L
HHHHH
L
H
HHHHH
4
L
H
L
L
H
HHH
L
HHHHH
5
L
H
L
HHHHHH
L
H
HHH
6
L
H
HLH
H
H
H
H
HLH
H
H
7
L
HHHHHHHHHH
L
H
H
8
H
L
L
L
H
HHHHHHH
L
H
9
H
L
L
HHHHHHHHHH
L
I
H
L
H
L
H
HHHHHHHHH
N
H
L
HHHHHHHHHHHH
V
HH
L
L
HHHHHHHHHH
A
HH
L
H
HHHHHHHHHH
L
HHH
L
H
HHHHHHHHH
I
HHHHHHHHHHHHHH
D
H e High Level
L e Low Level
Logic Diagram
TLF6365 – 2
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A


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