54LS160ALMQB datasheet(1/8 Pages) NSC

Il numero della parte	54LS160ALMQB

Spiegazioni elettronici	Synchronous Presettable BCD Decade Counters

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Produttore elettronici	NSC [National Semiconductor (TI)]

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TLF10177

May 1992

54LS160ADM74LS160A 54LS162ADM74LS162A

Synchronous Presettable BCD Decade Counters

General Description

The ’LS160 and ’LS162 are high speed synchronous dec-

ade counters operating in the BCD (8421) sequence They

are synchronously presettable for application in programma-

ble dividers and have two types of Count Enable inputs plus

a Terminal Count output for versatility in forming synchro-

nous multistage counters The ’LS160 has an asynchronous

Master Reset input that overrides all other inputs and forces

the outputs LOW The ’LS162 has a Synchronous Reset

input that overrides counting and parallel loading and allows

all outputs to be simultaneously reset on the rising edge of

the clock

Features

Y

Synchronous counting and loading

Y

High speed synchronous expansion

Y

Typical count rate of 35 MHz

Y

Fully edge triggered

Connection Diagram

Dual-In-Line Package

TLF10177 – 1

MR for ’LS160

SR for ’LS162

Order Number 54LS160ADMQB 54LS160AFMQB 54LS160ALMQB

54LS162ADMQB 54LS162AFMQB 54LS162ALMQB DM74LS160AM

DM74LS160AN DM74LS162AM or DM74LS162AN

See NS Package Number E20A J16A M16A N16E or W16A

Description

Names

CEP

Count Enable Parallel Input

CET

Count Enable Trickle Input

CP

Clock Pulse Input (Active Rising Edge)

MR (’160)

Asynchronous Master Reset

Input (Active LOW)

SR (’162)

Synchronous Reset

Input (Active LOW)

P0 – P3

Parallel Data Inputs

PE

Parallel Enable Input

(Active LOW)

Q0 – Q3

Flip-Flop Outputs

TC

Terminal Count Output

Logic Symbol

TLF10177 – 2

VCC e Pin 16

MR for ’LS160

GND e Pin 8

SR for ’LS162

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A

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