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74AHCT123AD

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.

Alternatives

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74AHCT123AD 74AHCT123AD,112 935265561112 SOT109-1 Order product
74AHCT123AD 74AHCT123AD,118 935265561118 SOT109-1 Order product

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
  • ESD protection:
    • HBM JESD22-A114E exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
    • CDM JESD22-C101C exceeds 1000 V
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level A
  • Multiple package options
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Applications

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
74AHCT123ADProduction4.5 - 5.5TTL± 85.0low-40~1259310.153SO16

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
74AHCT123AD74AHCT123AD,112
( 9352 655 61112 ) 		Active74AHCT123AD
SO16
(SOT109-1) 		SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk Pack
74AHCT123AD,118
( 9352 655 61118 ) 		Active74AHCT123ADReel 13" Q1/T1

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFEFRIFRMTBF (hour)MSLMSL leadfree
74AHCT123AD74AHCT123AD,11274AHCT123AD84.96.621.51E811
74AHCT123AD74AHCT123AD,11874AHCT123AD84.96.621.51E811
Quality and reliability disclaimer

Series

Documentation (5)

File nameTitleTypeDate
74AHC_AHCT123ADual retriggerable monostable multivibrator with resetData sheet2020-06-17
AN11106Pin FMEA for AHC/AHCT familyApplication note2019-01-09
ahct123aahct123a IBIS modelIBIS model2013-04-08
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SO-SOJ-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

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingBuy online
74AHCT123AD74AHCT123AD,112935265561112Bulk PackOrder product
74AHCT123AD74AHCT123AD,118935265561118Reel 13" Q1/T1Order product

Sample

As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.