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PDF DM54LS42 Data sheet ( Hoja de datos )

Número de pieza DM54LS42
Descripción BCD/Decimal Decoders
Fabricantes National Semiconductor 
Logotipo National Semiconductor Logotipo



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No Preview Available ! DM54LS42 Hoja de datos, Descripción, Manual

June 1989
54LS42 DM54LS42 DM74LS42 BCD Decimal 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
Connection Diagram
Dual-In-Line Package
TL F 6365 – 1
Order Number 54LS42DMQB 54LS42FMQB
DM54LS42J DM54LS42W DM74LS42M or DM74LS42N
See NS Package Number J16A M16A N16E or W16A
Logic Diagram
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 Military Aerospace device (54LS42) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Function Table
No BCD Inputs
Decimal Outputs
DCBA0 1 2 3 4 5 6 7 8 9
0 L L L L LHHHHHHHHH
1 L L LHHLHHHHHHHH
2 L LHLHHLHHHHHHH
3 L LHHHHHLHHHHHH
4 LHL LHHHHLHHHHH
5 LHLHHHHHHLHHHH
6 LHHLHHHHHHLHHH
7 LHHHHHHHHHHLHH
8 HL L LHHHHHHHHLH
9 HL LHHHHHHHHHHL
I
N
V
A
L
I
D
H L H L HHHHHHHHHH
H L HHHHHHHHHHHH
HHL LHHHHHHHHHH
HH L HHHHHHHHHHH
HHH L HHHHHHHHHH
HHHHHHHHHHHHHH
H e High Level
L e Low Level
C1995 National Semiconductor Corporation TL F 6365
TL F 6365 – 2
RRD-B30M105 Printed in U S A

1 page




DM54LS42 pdf
Physical Dimensions inches (millimeters) (Continued)
16-Lead Small Outline Molded Package (M)
Order Number DM74LS42M
NS Package Number M16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM74LS42N
NS Package Number N16E
5

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