MM54HCT193J NSC [National Semiconductor], MM54HCT193J Datasheet

MM54HCT193J

Manufacturer Part Number

MM54HCT193J

Description

Synchronous Binary Up/Down Counters

Manufacturer

NSC [National Semiconductor]

Datasheet

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C 1995 National Semiconductor Corporation

MM54HCT193 MM74HCT193

Synchronous Binary Up Down Counters

General Description

These high speed synchronous counters utilize advanced

silicon-gate CMOS technology to achieve the high noise im-

munity and low power consumption of CMOS technology

along with the speeds of low power Schottky TTL The

MM54HCT193 MM74HCT193 is a binary counter having

two separate clock inputs an UP COUNT input and a

DOWN COUNT input All outputs of the flip-flops are simul-

taneously triggered on the low-to-high transition of either

clock while the other input is held high The direction of

counting is determined by which input is clocked

This device has TTL compatible inputs It can drive 15 LS-

TTL loads

This counter may be preset by entering the desired data on

the DATA A DATA B DATA C and DATA D inputs When

the LOAD input is taken low the data is loaded indepen-

dently of either clock input This feature allows the counter

to be used as a divide-by-n counter by modifying the count

length with the preset inputs

In addition the HCT193 can also be cleared This is accom-

plished by inputting a high on the CLEAR input All 4 internal

stages are set to a low level independently of either COUNT

input

Connection Diagram

Order Number MM54HCT193 or MM74HCT193

Dual-In-Line Package

TL F 5742

TL F 5742 – 1

Both a BORROW and CARRY output are provided to en-

able cascading of both up and down counting functions The

BORROW output produces a negative-going pulse when

the counter underflows and the CARRY outputs a pulse

when the counter overflows The counter can be cascaded

by connecting the CARRY and BORROW outputs of one

device to the COUNT UP and COUNT DOWN inputs re-

spectively of the next device

All inputs are protected from damage due to static dis-

charge by diodes to V

Features

Truth Table

Low quiescent supply current 80

Series)

Low input current 1 A maximum

TTL compatible inputs

high level

low level

transition from low-to-high

don’t care

Count

Down

Clear

and ground

Load

A maximum (74HCT

RRD-B30M105 Printed in U S A

Count Down

Function

Count Up

January 1988

Clear

Load

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MM54HCT193J Summary of contents

Page 1

MM54HCT193 MM74HCT193 Synchronous Binary Up Down Counters General Description These high speed synchronous counters utilize advanced silicon-gate CMOS technology to achieve the high noise im- munity and low power consumption of CMOS technology along with the speeds of low power ...

Page 2

Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage ( Input Voltage ( Output ...

Page 3

AC Electrical Characteristics (Note Symbol Parameter f Maximum Clock MAX Frequency t Maximum Propagation PLH PHL Delay Time t Maximum Propagation PLH PHL Delay ...

Page 4

4 ...

Page 5

Logic Waveforms ’HCT193 Synchronous Binary Counters Typical Clear Load and Count Sequences Sequence (1) Clear outputs to zero (2) Load (preset) to binary thirteen (3) Count up to fourteen fifteen carry zero one and two (4) Count down to one ...

Page 6

6 ...

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... Physical Dimensions inches (millimeters) Order Number MM54HCT193J or MM74HCT193J Ceramic Dual-In-Line Package (J) NS Package J16A 7 ...

Page 8

Physical Dimensions inches (millimeters) (Continued) LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 ...

Page 9

... This datasheet has been download from: www.datasheetcatalog.com Datasheets for electronics components. ...

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