Fairchild Semiconductor DM7445N Datasheet

DM7445
BCD to Decimal Decoders/Drivers

DM7445 BCD to Decimal Decoders/Drivers

September 1986
Revised February 2000

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 mak e BCD input data available for
decoding by the NAND gates. Fu ll 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 ar e com­patible for interfacing with most MOS integrated circuits.

Features

■ Full decoding of input logic

■ 80 mA sink-current capability

■ All outputs are off for invalid BCD input conditions

Ordering Code:

Order Number Package Number Package Description

DM7445 N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Connection Diagram

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Function Table

DM7445

H = HIGH Level (OFF)
L = LOW Level (ON)

Logic Diagram

No. Inputs Outputs

DCBA0123456789

0LLLLLHHHHHHHHH
1LLLHHLHHHHHHHH
2LLHLHHLHHHHHHH
3LLHHHHHLHHHHHH
4LHLLHHHHLHHHHH
5LHLHHHHHHLHHHH
6LHHLHHHHHHLHHH
7LHHHHHHHHHHLHH
8HLLLHHHHHHHHLH
9HLLHHHHHHHHHHL

IHLHLHHHHHHHHHH
NHLHHHHHHHHHHHH
VHHLLHHHHHHHHHH
AHHLHHHHHHHHHHH
LHHHLHHHHHHHHHH

IHHHHHHHHHHHHHH
D

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