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MOSFETs

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Analog & Logic ICs

Automotive qualified products (AEC-Q100/Q101)

74HCT123DB

Dual retriggerable monostable multivibrator with reset

The 74HC123; 74HCT123 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 discontinued

Alternatives

Features and benefits

  • 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: CMOS level

    • For 74HCT123: 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:

    • 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 number Package name
74HCT123DB SSOP16

PCB Symbol, Footprint and 3D Model

Model Name Description

Package

All type numbers in the table below are discontinued.

Type number Orderable part number, (Ordering code (12NC)) Status Marking Package Package information Reflow-/Wave soldering Packing
74HCT123DB 74HCT123DB,112
(935186840112)		 Obsolete SOT338-1
SSOP16
(SOT338-1) 		SOT338-1 SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Not available
74HCT123DB,118
(935186840118)		 Obsolete Not available

Environmental information

All type numbers in the table below are discontinued.

Type number Orderable part number Chemical content RoHS RHF-indicator
74HCT123DB 74HCT123DB,112 74HCT123DB rohs rhf rhf
74HCT123DB 74HCT123DB,118 74HCT123DB rohs rhf rhf
Quality and reliability disclaimer

Series

Documentation (9)

File name Title Type Date
74HC_HCT123 Dual retriggerable monostable multivibrator with reset Data sheet 2024-02-21
AN11044 Pin FMEA 74HC/74HCT family Application note 2019-01-09
Nexperia_package_poster Nexperia package poster Leaflet 2020-05-15
SSOP16_SOT338-1_mk plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm body Marcom graphics 2017-01-28
SOT338-1 plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm body Package information 2022-06-20
SSOP-TSSOP-VSO-REFLOW Footprint for reflow soldering Reflow soldering 2009-10-08
hc HC/HCT Spice model SPICE model 2022-02-17
HCT_USER_GUIDE HC/T User Guide User manual 1997-10-31
SSOP-TSSOP-VSO-WAVE Footprint for wave soldering Wave soldering 2009-10-08

Support

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Models

File name Title Type Date
hc HC/HCT Spice model SPICE model 2022-02-17

PCB Symbol, Footprint and 3D Model

Model Name Description

How does it work?

The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.

Interactive datasheet