74HC123-Q100; 74HCT123-Q100

Dual retriggerable monostable multivibrator with reset

The 74HC123-Q100; 74HCT123-Q100 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 include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Schmitt-trigger action in the nA and nB inputs, makes the circuit highly tolerant to slower input rise and fall times.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100 (Grade 1) and is suitable for use in automotive applications.

Features and benefits

  • Automotive product qualification in accordance with AEC-Q100 (Grade 1)
    • Specified from -40 °C to +85 °C and from -40 °C to +125 °C
  • Wide supply voltage range from 2.0 V to 6.0 V
  • CMOS low power dissipation
  • High noise immunity
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
  • Complies with JEDEC standards:
    • JESD8C (2.7 V to 3.6 V)
    • JESD7A (2.0 V to 6.0 V)
  • Input levels:
    • For 74HC123-Q100: CMOS level
    • For 74HCT123-Q100: TTL level
  • DC triggered from active HIGH or active LOW inputs
  • Retriggerable for very long pulses up to 100 % duty factor
  • Direct reset terminates output pulse
  • Schmitt-trigger action on all inputs except for the reset input
  • ESD protection:
    • MIL-STD-883, method 3015 exceeds 2000 V
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0 Ω)
  • Multiple package options
  • DHVQFN package with Side-Wettable Flanks enabling Automatic Optical Inspection (AOI) of solder joints


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
74HC123BQ-Q100Production2.0 - 6.0CMOS± 7.89low-40~1259011.859DHVQFN16
74HC123D-Q100Production2.0 - 6.0CMOS± 5.226low-40~125908.349SO16
74HC123PW-Q100Production2.0 - 6.0CMOS± 5.226low-40~1251223.951.5TSSOP16
74HCT123D-Q100Production4.5 - 5.5TTL± 426low-40~125908.349SO16
74HCT123PW-Q100Production4.5 - 5.5TTL± 426low-40~1251223.951.5TSSOP16


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
Reel 7” Q1/T1 or Q2/T3ActiveHC12374HC123BQ-Q100,115
( 9352 990 41115 )
Reel 13" Q1/T1Active74HC123D74HC123D-Q100,118
( 9352 990 42118 )
Reel 13" Q1/T1ActiveHC12374HC123PW-Q100,118
( 9352 990 43118 )
Reel 13" Q1/T1Active74HCT123D74HCT123D-Q100J
( 9352 990 45118 )
Reel 13" Q1/T1ActiveHCT12374HCT123PW-Q100,11
( 9352 990 46118 )

Discontinuation information

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

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC123BQ-Q10074HC123BQ-Q100,11574HC123BQ-Q100Always Pb-free40.01.47.46E811
74HC123D-Q10074HC123D-Q100,11874HC123D-Q100Always Pb-free40.01.47.46E811
74HC123PW-Q10074HC123PW-Q100,11874HC123PW-Q100Always Pb-free40.01.47.46E811
74HCT123D-Q10074HCT123D-Q100J74HCT123D-Q100week 25, 201940.01.47.46E811
74HCT123PW-Q10074HCT123PW-Q100,1174HCT123PW-Q100Always Pb-free40.01.47.46E811
Quality and reliability disclaimer

Documentation (8)

File nameTitleTypeDate
74HC_HCT123_Q100Dual retriggerable monostable multivibrator with resetData sheet2020-10-15
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
hcHC/HCT Spice modelSPICE model2022-02-17
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08
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


Find answers to your design questions on this page. If available you can find information in our Nexperia Support Community or you can find Nexperia models and Design tools.


File nameTitleTypeDate
hcHC/HCT Spice modelSPICE model2022-02-17


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