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74145N

BCD to Decimal Decoders/Drivers

Fairchild Semiconductor 

September 1986

Revised February 2000

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

s Full decoding of input logic

s 80 mA sink-current capability

s All outputs are OFF for invalid BCD input conditions

Ordering Code:

Order Number Package Number

Package Description

DM74145N

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Connection Diagram

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 = HIGH Level (OFF)

L = LOW Level (ON)

© 2000 Fairchild Semiconductor Corporation DS006544

www.fairchildsemi.com

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