IN74LS138 datasheet, PDF - EEWORLD Datasheet

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IN74LS138: Description3-to-8-line decoder/demultiplexer; File Size153KB，3 Pages; ManufacturerIK Semicon; Websitehttp://www.iksemi.com/en/index.html

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IN74LS138 Overview

3-to-8-line decoder/demultiplexer

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TECHNICAL DATA

IN74LS138

3-to-8-Line Decoder/Demultiplexer

This schottky-clamped TTL MSI circuit is designed to be used in

high-performance memory-decording or data-routing applications

requiring very short propagation delay time. In high-performance

memory systems this decode can be used to minimize the effects of

system decoding. When employed with high-speed memories utilizing

a fast enable circuit the delay times of this decorder and the enable

time of the memory are usually less than the typical access times of the

memory. This means that the effective system delay introduced by the

schottky-clampled system decoder is negligible.

•

Designed Specifically for High Speed Memory Decoders and Data

Transmission Systems

•

Incorporate 3 Enabler Inputs to Simplify Cascading AND/OR Data

Reception

•

Schottky Clamped for High Performance

ORDERING INFORMATION

IN74LS138N Plastic

IN74LS138D SOIC

= 0° to 70° C

for all packages

PIN ASSIGNMENT

LOGIC DIAGRAM

FUNCTION TABLE

Inputs

CS1 CS2 CS3

X X H

X H X

L X X

A2 A1 A0

X X X

Outputs

Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7

H H H H H H H H

PIN 16 =V

PIN 8 = GND

H = high level (steady state)

L = low level (steady state)

X = don’t care

IN74LS138 Related Products

	IN74LS138	IN74LS138N	IN74LS138D
Description	3-to-8-line decoder/demultiplexer	3-to-8-line decoder/demultiplexer	3-to-8-line decoder/demultiplexer

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