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74AHC123A; 74AHCT123A

Dual retriggerable monostable multivibrator with reset

The 74AHC123A; 74AHCT123A is a dual retriggerable monostable multivibrator with reset. The basic output pulse width is programmed by selection of external components (REXT and CEXT). Once triggered this basic pulse width may be extended by retriggering either of the edge triggered inputs (nA or (nB). By repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made as long as desired. Alternatively, an output delay can be terminated at any time by a LOW-going edge on input nRD. Inputs are overvoltage tolerant. This feature allows the use of these devices as translators in mixed voltage environments.

Features and benefits

  • Wide supply voltage range from 2.0 V to 5.5 V

  • DC triggered from active HIGH or active LOW inputs

  • Retriggerable for very long pulses up to 100 % duty factor

  • Direct reset terminates output pulse

  • Overvoltage tolerant inputs to 5.5 V

  • All inputs have a Schmitt-trigger action

  • High noise immunity

  • Input levels:

    • For 74AHC123A: CMOS level

    • For 74AHCT123A: TTL level

  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level A

  • ESD protection:

    • HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V

    • CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V

  • Multiple package options

  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Parametrics

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
74AHC123ABQProduction2.0 - 5.5CMOS± 85.1low-40~1259414.463DHVQFN16
74AHC123ADProduction2.0 - 5.5CMOS± 85.1low-40~1259310.153SO16
74AHC123APWProduction2.0 - 5.5CMOS± 85.1low-40~1251264.855.7TSSOP16
74AHCT123ABQProduction4.5 - 5.5TTL± 85.0low-40~1259414.463DHVQFN16
74AHCT123ADProduction4.5 - 5.5TTL± 85.0low-40~1259310.153SO16
74AHCT123APWProduction4.5 - 5.5TTL± 85.0low-40~1251264.855.7TSSOP16

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74AHC123ABQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveAC123A74AHC123ABQ,115
( 9352 854 24115 )
74AHC123AD
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_118Active74AHC123AD74AHC123AD,118
( 9352 655 63118 )
74AHC123APW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118ActiveAHC123A74AHC123APW,118
( 9352 655 64118 )
74AHCT123ABQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveAT123A74AHCT123ABQ,115
( 9352 854 25115 )
74AHCT123AD
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_118Active74AHCT123AD74AHCT123AD,118
( 9352 655 61118 )
74AHCT123APW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118ActiveAHT123A74AHCT123APW,118
( 9352 655 62118 )

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74AHC123AD
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
SOT109-1_112Withdrawn / End-of-life74AHC123AD74AHC123AD,112
( 9352 655 63112 )
74AHC123APW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_112Withdrawn / End-of-lifeAHC123A74AHC123APW,112
( 9352 655 64112 )
74AHCT123APW
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_112Withdrawn / End-of-lifeAHT123A74AHCT123APW,112
( 9352 655 62112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74AHC123AD9352655631122021-12-312022-06-3074AHC123AD
    74AHC123APW9352655641122021-12-312022-06-3074AHC123APW
      74AHCT123AD9352655611122021-12-312022-06-3074AHCT123AD
        74AHCT123APW9352655621122021-12-312022-06-3074AHCT123APW

          Environmental information

          Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
          74AHC123ABQ74AHC123ABQ,11574AHC123ABQAlways Pb-free
          74AHC123AD74AHC123AD,11874AHC123ADweek 35, 2004
          74AHC123APW74AHC123APW,11874AHC123APWweek 10, 2005
          74AHCT123ABQ74AHCT123ABQ,11574AHCT123ABQAlways Pb-free
          74AHCT123AD74AHCT123AD,11874AHCT123ADweek 5, 2005
          74AHCT123APW74AHCT123APW,11874AHCT123APWweek 10, 2005

          The variants in the table below are discontinued. See the table Discontinuation information for more information.

          Type numberOrderable part numberChemical contentRoHSRHF-indicatorLeadfree conversion date
          74AHC123AD74AHC123AD,11274AHC123ADweek 35, 2004
          74AHC123APW74AHC123APW,11274AHC123APWweek 10, 2005
          74AHCT123APW74AHCT123APW,11274AHCT123APWweek 10, 2005
          Quality and reliability disclaimer

          Documentation (10)

          File nameTitleTypeDate
          74AHC_AHCT123ADual retriggerable monostable multivibrator with resetData sheet2024-02-28
          ahct123aahct123a IBIS modelIBIS model2013-04-08
          ahc123aahc123a IBIS modelIBIS model2013-04-08
          SOT763-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm bodyPackage information2023-05-11
          SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
          SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
          WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08
          SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm bodyPackage information2023-11-07
          SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm bodyPackage information2023-11-08
          SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08

          Support

          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.

          Models

          File nameTitleTypeDate
          ahct123aahct123a IBIS modelIBIS model2013-04-08
          ahc123aahc123a IBIS modelIBIS model2013-04-08

          Ordering, pricing & availability

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