Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

DM74LS138N Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part # DM74LS138N
Description  Decoder/Demultiplexer
Download  7 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

DM74LS138N Datasheet(HTML) 1 Page - Fairchild Semiconductor

  DM74LS138N Datasheet HTML 1Page - Fairchild Semiconductor DM74LS138N Datasheet HTML 2Page - Fairchild Semiconductor DM74LS138N Datasheet HTML 3Page - Fairchild Semiconductor DM74LS138N Datasheet HTML 4Page - Fairchild Semiconductor DM74LS138N Datasheet HTML 5Page - Fairchild Semiconductor DM74LS138N Datasheet HTML 6Page - Fairchild Semiconductor DM74LS138N Datasheet HTML 7Page - Fairchild Semiconductor  
Zoom Inzoom in Zoom Outzoom out
 1 / 7 page
background image
© 2000 Fairchild Semiconductor Corporation
DS006391
www.fairchildsemi.com
August 1986
Revised March 2000
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.
Features
s Designed specifically for high speed:
Memory decoders
Data transmission systems
s DM74LS138 3-to-8-line decoders incorporates 3 enable
inputs to simplify cascading and/or data reception
s DM74LS139 contains two fully independent 2-to-4-line
decoders/demultiplexers
s Schottky clamped for high performance
s Typical propagation delay (3 levels of logic)
DM74LS138
21 ns
DM74LS139
21 ns
s Typical power dissipation
DM74LS138
32 mW
DM74LS139
34 mW
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Order Number
Package Number
Package Description
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
DM74LS138N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DM74LS139M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74LS139SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74LS139N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide


Similar Part No. - DM74LS138N

ManufacturerPart #DatasheetDescription
logo
National Semiconductor ...
DM74LS138N NSC-DM74LS138N Datasheet
165Kb / 8P
   Decoders/Demultiplexers
More results

Similar Description - DM74LS138N

ManufacturerPart #DatasheetDescription
logo
ON Semiconductor
MC74AC138DR2G ONSEMI-MC74AC138DR2G Datasheet
182Kb / 11P
   Decoder/Demultiplexer
March, 2006 ??Rev. 6
logo
Unisonic Technologies
U74LVC1G19 UTC-U74LVC1G19_15 Datasheet
161Kb / 5P
   DECODER/DEMULTIPLEXER
logo
Fairchild Semiconductor
DM74S138 FAIRCHILD-DM74S138 Datasheet
55Kb / 5P
   Decoder/Demultiplexer
logo
Micrel Semiconductor
SY100S370 MICREL-SY100S370_07 Datasheet
74Kb / 5P
   UNIVERSAL DEMULTIPLEXER/ DECODER
SY100S370 MICREL-SY100S370_06 Datasheet
97Kb / 8P
   UNIVERSAL DEMULTIPLEXER/DECODER
SY100S370 MICREL-SY100S370 Datasheet
113Kb / 7P
   UNIVERSAL DEMULTIPLEXER/ DECODER
logo
ON Semiconductor
NL7SZ19 ONSEMI-NL7SZ19_07 Datasheet
115Kb / 6P
   1?뭪o?? Decoder/Demultiplexer
February, 2007 ??Rev. 10
MC74AC151 ONSEMI-MC74AC151 Datasheet
237Kb / 10P
   1?뭥f?? Decoder/Demultiplexer
June, 2006 ??Rev. 6
MC74AC138 ONSEMI-MC74AC138 Datasheet
189Kb / 11P
   1?뭥f?? Decoder/Demultiplexer
March, 2006 ??Rev. 6
MC74HC138A ONSEMI-MC74HC138A_05 Datasheet
116Kb / 10P
   1?뭥f?? Decoder/ Demultiplexer
June, 2005 ??Rev. 9
More results


Html Pages

1 2 3 4 5 6 7


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com