DM74LS249 datasheet(1/6 Pages) NSC

部品番号	DM74LS249

部品情報	BCD to 7-Segment Decoder with Open-Collector Outputs

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メーカー	NSC [National Semiconductor (TI)]

ホームページ	http://www.national.com

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TLF10213

February 1992

DM74LS249

BCD to 7-Segment Decoder with Open-Collector Outputs

General Description

The ’LS249 has active HIGH open-collector outputs and in-

corporates the Lamp Test and BIRBO inputs Additionally

the ’LS249 will light the top bar (segment a) for numeral 6

and the bottom bar (segment d) for numeral 9

Connection Diagram

Dual-In-Line Package

TLF10213 – 1

Order Number DM74LS249N

See NS Package Number N16E

Logic Symbol

TLF10213 – 2

VCC e Pin 16

GND e Pin 8

Pin Names

Description

A0–A3

BCD Inputs

BI

Blanking Input (Active LOW)

LT

Lamp Test Input (Active LOW)

BIRBO

Blanking Input (Active LOW) or

Ripple Blanking Output (Active LOW)

a – g

Segment Outputs (Active HIGH)

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A

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