DM54145 Datasheet, PDF (1/4 Pages) National Semiconductor (TI) – BCD to Decimal Decoders/Drivers

June 1989
DM54145 DM74145
BCD to Decimal Decoders Drivers
General Description
These BCD-to-decimal decoders drivers consist of eight in-
verters and ten four-input NAND gates The inverters are
connected in pairs to make BCD input data available for
decoding by the NAND gates Full decoding of BCD input
logic ensures that all outputs remain off for all invalid (10 –
15) binary input conditions These decoders feature high-
performance NPN output transistors designed for use as
indicator relay drivers or as open-collector logic-circuit driv-
ers The high-breakdown output transistors are compatible
for interfacing with most MOS integrated circuits
Features
Y _{Full decoding of input logic}
Y _{80 mA sink-current capability}
Y _{All outputs are off for invalid BCD input conditions}
Connection Diagram
Dual-In-Line Package
TL F 6544 – 1
Order Number DM54145J DM54145W or DM74145N
See NS Package Number J16A N16E or W16A
Function Table
No
Inputs
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 HLHLHHHHHHHHHH
N HLHHHHHHHHHHHH
V HHL LHHHHHHHHHH
A HHLHHHHHHHHHHH
L HHHLHHHHHHHHHH
I HHHHHHHHHHHHHH
D
H e High Level (Off) L e Low Level (On)
C1995 National Semiconductor Corporation TL F 6544
RRD-B30M105 Printed in U S A