54AC169LMQB-RH

更新时间： 2024-02-10 10:00:07

品牌	Logo	应用领域
美国国家半导体 - NSC		计数器
页数	文件大小	规格书
10页	187K
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54AC169LMQB-RH 数据手册

July 1998

54AC169 • 54ACT169

4-Stage Synchronous Bidirectional Counter

n Synchronous counting and loading

n Built-In lookahead carry capability

The ’AC/’ACT169 is fully synchronous 4-stage up/down

n Presettable for programmable operation

General Description

counter. The ’AC/’ACT169 is a modulo-16 binary counter. It

features a preset capability for programmable operation,

carry lookahead for easy cascading and a U/D input to con-

n Outputs source/sink 24 mA

n ’ACT has TTL-compatible inputs

n Standard Microcircuit Drawing (SMD)

5962-91603

trol the direction of counting. All state changes, whether in

counting or parallel loading, are initiated by the

LOW-to-HIGH transition of the Clock.

Features

n I_CCreduced by 50%

Logic Symbols

Names

CEP

CET

Description

Count Enable Parallel Input

Count Enable Trickle Input

Clock Pulse Input

P₀–P₃

Parallel Data Inputs

Parallel Enable Input

Up-Down Count Control Input

Flip-Flop Outputs

U/D

Q₀–Q₃

DS100276-1

Terminal Count Output

IEEE/IEC

DS100276-2

™

FACT is a trademark of Fairchild Semiconductor Corporation.

DS100276

www.national.com

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