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74AHC138; 74AHCT138

Selection guide

Datasheet

74AHC138; 74AHCT138
(Product Specification)
28-Nov-07, 16 pages, 96 kB

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74AHC138; 74AHCT138 - 3-to-8 line decoder/demultiplexer; inverting

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
All information hereunder is subject to the subsequent disclaimers

General description

The 74AHC138; 74AHCT138 are high-speed Si-gate CMOS devices and are pin compatible with Low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard No. 7A.

The 74AHC138; 74AHCT138 is a 3-to-8 line decoder/demultiplexer. It accepts three binary weighted address inputs (A0, A1 and A2) and, when enabled, provides eight mutually exclusive outputs (Y0 to Y7) that are LOW when selected.

There are three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH.

This multiple enable function allows easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four 74AHC138; 74AHCT138 devices and one inverter. The 74AHC138; 74AHCT138 can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. Unused enable inputs must be permanently tied to their appropriate active HIGH or LOW state.

Features

  • Balanced propagation delays
  • All inputs have Schmitt-trigger action
  • Demultiplexing capability
  • Multiple input enable for easy expansion
  • Ideal for memory chip select decoding
  • Inputs accepts voltages higher than VCC
  • For 74AHC138 only: operates with CMOS input levels
  • For 74AHCT138 only: operates with TTL input levels
  • ESD protection:
    • HBM JESD22-A114E exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
    • CDM JESD22-C101C exceeds 1000 V
  • Multiple package options
  • Specified from -40 Cel to +85 Cel and from -40 Cel to +125 Cel

Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
74AHC138BQ74AHC138BQ,1159352 855 72115Volume productionSOT763-1
(DHVQFN16)
Reel Pack, SMD, 7"Standard Marking
74AHC138D74AHC138D,1129352 629 99112Volume productionSOT109TubeStandard Marking
74AHC138D74AHC138D,1189352 629 99118Volume productionSOT109Reel Pack, SMD, 13"Standard Marking
74AHC138PW74AHC138PW,1129352 630 00112Volume productionSOT403-1
(TSSOP16)
TubeStandard Marking
74AHC138PW74AHC138PW,1189352 630 00118Volume productionSOT403-1
(TSSOP16)
Reel Pack, SMD, 13"Standard Marking
74AHCT138BQ74AHCT138BQ,1159352 855 73115Volume productionSOT763-1
(DHVQFN16)
Reel Pack, SMD, 7"Standard Marking
74AHCT138D74AHCT138D,1129352 629 97112Volume productionSOT109TubeStandard Marking
74AHCT138D74AHCT138D,1189352 629 97118Volume productionSOT109Reel Pack, SMD, 13"Standard Marking
74AHCT138PW74AHCT138PW,1129352 629 98112Volume productionSOT403-1
(TSSOP16)
TubeStandard Marking
74AHCT138PW74AHCT138PW,1189352 629 98118Volume productionSOT403-1
(TSSOP16)
Reel Pack, SMD, 13"Standard Marking

Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
74AHC138BQ74AHC138BQ,11574AHC138BQ
Always Pb-free 6,621,51E+081
74AHC138D74AHC138D,11274AHC138D
week 35, 2004 6,621,51E+081
74AHC138D74AHC138D,11874AHC138D
week 35, 2004 6,621,51E+081
74AHC138PW74AHC138PW,11274AHC138PW
week 10, 2005 6,621,51E+081
74AHC138PW74AHC138PW,11874AHC138PW
week 10, 2005 6,621,51E+081
74AHCT138BQ74AHCT138BQ,11574AHCT138BQ
Always Pb-free 6,621,51E+081
74AHCT138D74AHCT138D,11274AHCT138D
week 35, 2004 6,621,51E+081
74AHCT138D74AHCT138D,11874AHCT138D
week 35, 2004 6,621,51E+081
74AHCT138PW74AHCT138PW,11274AHCT138PW
week 10, 2005 6,621,51E+081
74AHCT138PW74AHCT138PW,11874AHCT138PW
week 10, 2005 6,621,51E+081

Quality and reliability disclaimer

Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
74AHC138BQ9352 855 72115  74AHC138BQ,115  NAARROW ELECTRONICS3,000 11/19/2009Buy onlinenot available
74AHC138D9352 629 99112  74AHC138D,112  0.1900NAARROW ELECTRONICS939 11/19/2009Buy onlinenot available
74AHC138D9352 629 99118  74AHC138D,118  0.1900NAARROW ELECTRONICS939 11/19/2009Buy onlinenot available
    NADIGI-KEY CORPORATION4,920 11/20/2009Buy online 
    NAMOUSER ELECTRONICS320 11/20/2009Buy online 
    NAFUTURE ELECTRONICS42,500 11/19/2009Buy online 
    NAMOUSER ELECTRONICS320 11/20/2009Buy online 
    ASIAWPI5,000250011/19/2009Buy online 
74AHC138PW9352 630 00112  74AHC138PW,112  0.1900      not available
74AHC138PW9352 630 00118  74AHC138PW,118  0.1900NAMOUSER ELECTRONICS2,500 11/20/2009Buy onlineOrder samples
    NAFUTURE ELECTRONICS16,920 11/19/2009Buy online 
    NAARROW ELECTRONICS17,500 11/19/2009Buy online 
    NAMOUSER ELECTRONICS2,500 11/20/2009Buy online 
74AHCT138BQ9352 855 73115  74AHCT138BQ,115  NAARROW ELECTRONICS3,000 11/19/2009Buy onlinenot available
74AHCT138D9352 629 97112  74AHCT138D,112  0.1900      not available
74AHCT138D9352 629 97118  74AHCT138D,118  0.1900ASIAWPI2,500250011/19/2009Buy onlinenot available
74AHCT138PW9352 629 98112  74AHCT138PW,112  0.1900      not available
74AHCT138PW9352 629 98118  74AHCT138PW,118  0.1900NAMOUSER ELECTRONICS100 11/20/2009Buy onlinenot available
    NAAVNET ELECTRONICS MARKETING40,000 11/19/2009Buy online 
    NAMOUSER ELECTRONICS100 11/20/2009Buy online 
    ASIAWPI2,500250011/19/2009Buy online 

Block diagrams/pinning

Parametrics/similar products

Type numberPackageDescriptionPropagation Delay(ns)VoltagePower Dissipation ConsiderationsLogic Switching LevelsOutput Drive Capability
74AHC138BQSOT763-1
(DHVQFN16)
3-to-8 Line Decoder/Demultiplexer; Inverting4.4@5V2.0-5.5 VLow Power or Battery ApplicationsCMOS+/- 8 mA
74AHC138DSOT109
3-to-8 Line Decoder/Demultiplexer; Inverting4.4@5V2.0-5.5 VLow Power or Battery ApplicationsCMOS+/- 8 mA
74AHC138PWSOT403-1
(TSSOP16)
3-to-8 Line Decoder/Demultiplexer; Inverting4.4@5V2.0-5.5 VLow Power or Battery ApplicationsCMOS+/- 8 mA
74AHCT138DSOT109
3-to-8 Line Decoder/Demultiplexer; Inverting; TTL Enabled4.44.5-5.5 VLow PowerTTL+/- 8 mA
74AHCT138PWSOT403-1
(TSSOP16)
3-to-8 Line Decoder/Demultiplexer; Inverting; TTL Enabled4.44.5-5.5 VLow PowerTTL+/- 8 mA


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74AHC138; 74AHCT138 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.