TLF6544

June 1989

DM54145DM74145

BCD to Decimal DecodersDrivers

General Description

These BCD-to-decimal decodersdrivers 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

indicatorrelay 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

TLF6544 – 1

Order Number DM54145J DM54145W or DM74145N

See NS Package Number J16A N16E or W16A

Function Table

No

Inputs

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

H

H

L

L

H

HHHHHHHHH

A

H

H

L

HHHHHHHHHHH

L

H

HH

L

H

HHHHHHHHH

I

H

HHHHHHHHHHHHH

D

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A