© 2000 Fairchild Semiconductor Corporation DS006544 www.fairchildsemi.com
September 1986
Revised February 2000
DM74145
BCD t
o
Dec
i
mal
Decoder
s/Dri
ver
s
DM74145
BCD to Decimal Decoders/Drivers
General Description
These BCD-to-decimal decoders/drivers consist of eight
inverters 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
drivers. The high-breakdown output transistors are com-
patible for interfacing with most MOS integrated circuits.
Features
a73 Full decoding of input logic
a73 80 mA sink-current capability
a73 All outputs are OFF for invalid BCD input conditions

Ordering Code:
Connection Diagram Function Table
H = HIGH Level (OFF)
L = LOW Level (ON)
Order Number Package Number Package Description
DM74145N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
No. Inputs Outputs
DCBA0123456789
0 LLLLLHHHHHHHHH
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