54AC169L Datasheet

IC型號：
54AC169L
PDF描述：
4-Stage Synchronous Bidirectional Counter
文件大小：
187.63KB
PDF頁數(shù)：
10頁
芯片廠家：
NSC

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54AC169

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54ACT169 4-Stage Synchronous Bidirectional Counter

July 1998

54AC169

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54ACT169

4-Stage Synchronous Bidirectional Counter

General Description

The 鈥橝C/鈥橝CT169 is fully synchronous 4-stage up/down

counter. The 鈥橝C/鈥橝CT169 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-

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.

Synchronous counting and loading

Built-In lookahead carry capability

Presettable for programmable operation

Outputs source/sink 24 mA

鈥橝CT has TTL-compatible inputs

Standard Microcircuit Drawing (SMD)

5962-91603

Features

reduced by 50%

Logic Symbols

Names

CEP

CET

鈥揚

U/D

DS100276-1

Description

Count Enable Parallel Input

Count Enable Trickle Input

Clock Pulse Input

Parallel Data Inputs

Parallel Enable Input

Up-Down Count Control Input

Flip-Flop Outputs

Terminal Count Output

鈥換

IEEE/IEC

DS100276-2

FACT

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is a trademark of Fairchild Semiconductor Corporation.

漏 1998 National Semiconductor Corporation

DS100276

www.national.com

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