DM74LS293 datasheet(1/6 Pages) NSC

Part #	DM74LS293

Description	4-Bit Binary Counter

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Manufacturer	NSC [National Semiconductor (TI)]

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TLF6423

June 1989

DM74LS293 4-Bit Binary Counter

General Description

The ’LS293 counter is electrically and functionally identical

to the ’LS93 Only the arrangement of the terminals has

been changed for the ’LS293

Each of these monolithic counters contains four master-

slave flip-flops and additional gating to provide a divide-by-

two counter and a three-stage binary counter for which the

count cycle length is divide-by-eight

All of these counters have a gated zero reset

To use the maximum count length (four-bit binary) of these

counters the B input is connected to the QA output The

input count pulses are applied to input A and the outputs are

as described in the appropriate function table

Features

Y

GND and VCC on Corner Pins (Pins 7 and 14

respectively)

Y

Typical power dissipation 45 mW

Y

Count frequency 42 MHz

Connection Diagram

Dual-In-Line Package

TLF6423 – 1

Order Number DM74LS293M or DM74LS293N

See NS Package Number M14A or N14A

C1995 National Semiconductor Corporation

RRD-B30M105Printed in U S A

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