DM74LS138M Fairchild Semiconductor, DM74LS138M Datasheet

DM74LS138M

Manufacturer Part Number

DM74LS138M

Description

IC DECODER/DEMUX 3-8LINE 16-SOIC

Manufacturer

Fairchild Semiconductor

Series

74LSr

Type

Decoder/Demultiplexerr

Datasheet

1.DM74LS138N.pdf (7 pages)

Specifications of DM74LS138M

Circuit

1 x 2:4

Independent Circuits

Current - Output High, Low

400µA, 8mA

Voltage Supply Source

Single Supply

Voltage - Supply

4.75 V ~ 5.25 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Surface Mount

Package / Case

16-SOIC (3.9mm Width)

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

DM74LS138M

Manufacturer:

NS/国半

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

DM74LS138MX

Manufacturer:

FAIRCHILD/仙童

Quantity:

20 000

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DM74LS138M

DM74LS138SJ

DM74LS138N

DM74LS139M

DM74LS139SJ

DM74LS139N

DM74LS138 • DM74LS139

Decoder/Demultiplexer

General Description

These Schottky-clamped circuits are designed to be used

in high-performance memory-decoding or data-routing

applications, requiring very short propagation delay times.

In high-performance memory systems these decoders can

be used to minimize the effects of system decoding. When

used with high-speed memories, the delay times of these

decoders are usually less than the typical access time of

the memory. This means that the effective system delay

introduced by the decoder is negligible.

The DM74LS138 decodes one-of-eight lines, based upon

the conditions at the three binary select inputs and the

three enable inputs. Two active-low and one active-high

enable inputs reduce the need for external gates or invert-

ers when expanding. A 24-line decoder can be imple-

mented with no external inverters, and a 32-line decoder

requires only one inverter. An enable input can be used as

a data input for demultiplexing applications.

The DM74LS139 comprises two separate two-line-to-four-

line decoders in a single package. The active-low enable

input can be used as a data line in demultiplexing applica-

tions.

All of these decoders/demultiplexers feature fully buffered

inputs, presenting only one normalized load to its driving

circuit. All inputs are clamped with high-performance

Schottky diodes to suppress line-ringing and simplify sys-

tem design.

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Order Number

Package Number

M16A

M16D

M16A

M16D

N16E

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

DS006391

Features

Designed specifically for high speed:

DM74LS138 3-to-8-line decoders incorporates 3 enable

inputs to simplify cascading and/or data reception

DM74LS139 contains two fully independent 2-to-4-line

decoders/demultiplexers

Schottky clamped for high performance

Typical propagation delay (3 levels of logic)

Typical power dissipation

Memory decoders

Data transmission systems

DM74LS138 21 ns

DM74LS139 21 ns

DM74LS138 32 mW

DM74LS139 34 mW

Package Description

August 1986

Revised March 2000

www.fairchildsemi.com

Related parts for DM74LS138M

DM74LS138M Summary of contents

Page 1

... All inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify sys- tem design. Ordering Code: Order Number Package Number DM74LS138M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74LS138SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide ...

Page 2

Connection Diagrams DM74LS138 Function Tables DM74LS138 Inputs Outputs Enable Select G1 G2 (Note ...

Page 3

Absolute Maximum Ratings Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range DM74LS138 Recommended Operating Conditions Symbol Parameter V Supply Voltage CC V HIGH Level Input Voltage IH V LOW Level Input Voltage IL I HIGH Level ...

Page 4

DM74LS139 Recommended Operating Conditions Symbol Parameter V Supply Voltage CC V HIGH Level Input Voltage IH V LOW Level Input Voltage IL I HIGH Level Output Current OH I LOW Level Output Current OL T Free Air Operating Temperature A ...

Page 5

Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Package Number M16A 5 www.fairchildsemi.com ...

Page 6

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide www.fairchildsemi.com Package Number M16D 6 ...

Page 7

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right ...

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