74AHC139; 74AHCT139

Dual 2-to-4 line decoder/demultiplexer

The 74AHC139; 74AHCT139 is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard No. 7-A.

The 74AHC139; 74AHCT139 is a high-speed, dual 2-to-4 line decoder/demultiplexer. This device has two independent decoders, each accepting two binary weighted inputs (nA0 and nA1) and providing four mutually exclusive active LOW outputs (nY0 to nY3). Each decoder has an active LOW enable input (nE). When nE is HIGH, every output is forced HIGH. The enable input can be used as the data input for a 1-to-4 demultiplexer application.

The 74AHC139; 74AHCT139 is identical to the HEF4556 of the HE4000B family.

Features and benefits

  • Balanced propagation delays
  • All inputs have Schmitt-trigger actions
  • Inputs accept voltages higher than VCC
  • Input levels:
    • For 74AHC139: CMOS level
    • For 74AHCT139: TTL level
  • ESD protection:
    • HBM EIA/JESD22-A114E exceeds 2000 V
    • MM EIA/JESD22-A115-A exceeds 200 V
    • CDM EIA/JESD22-C101C exceeds 1000 V
  • Multiple package options
  • Specified from -40 Cel to +85 Cel and from -40 Cel to +125 Cel


Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74AHC139DProduction2.0 - 5.5CMOS± 83.9low-40~125908.649SO16
74AHC139PWProduction2.0 - 5.5CMOS± 83.9low-40~1251224.052TSSOP16
74AHCT139DProduction4.5 - 5.5TTL± 83.6low-40~125908.649SO16
74AHCT139PWProduction4.5 - 5.5TTL± 83.6low-40~1251224.052TSSOP16


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
Reel 13" Q1/T1Active74AHC139D74AHC139D,118
( 9352 635 65118 )
Bulk PackActive74AHC139D74AHC139D,112
( 9352 635 65112 )
Reel 13" Q1/T1ActiveAHC13974AHC139PW,118
( 9352 635 66118 )
Bulk PackActiveAHC13974AHC139PW,112
( 9352 635 66112 )
Reel 13" Q1/T1Active74AHCT139D74AHCT139D,118
( 9352 635 67118 )
Reel 13" Q1/T1ActiveAHCT13974AHCT139PW,118
( 9352 635 68118 )
Bulk PackActiveAHCT13974AHCT139PW,112
( 9352 635 68112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments

    Quality, reliability & chemical content

    Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
    74AHC139D74AHC139D,11874AHC139Dweek 35, 200440.81.57.79E411
    74AHC139D74AHC139D,11274AHC139Dweek 35, 200440.81.57.79E411
    74AHC139PW74AHC139PW,11874AHC139PWweek 10, 200540.81.57.79E411
    74AHC139PW74AHC139PW,11274AHC139PWweek 10, 200540.81.57.79E411
    74AHCT139D74AHCT139D,11874AHCT139Dweek 35, 200440.81.57.79E411
    74AHCT139PW74AHCT139PW,11874AHCT139PWweek 10, 200540.81.57.79E411
    74AHCT139PW74AHCT139PW,11274AHCT139PWweek 10, 200540.81.57.79E411
    Quality and reliability disclaimer

    Documentation (8)

    File nameTitleTypeDate
    74AHC_AHCT139Dual 2-to-4 line decoder/demultiplexerData sheet2017-07-20
    ahc139ahc139 IBIS modelIBIS model2013-04-07
    ahct139ahct139 IBIS modelIBIS model2013-04-07
    SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm bodyPackage information2021-01-06
    SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
    SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
    SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
    SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyPackage information2020-04-21


    If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.


    File nameTitleTypeDate
    ahc139ahc139 IBIS modelIBIS model2013-04-07
    ahct139ahct139 IBIS modelIBIS model2013-04-07

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