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74HCT123D - Dual retriggerable monostable multivibrator

Download the 74HCT123D datasheet PDF. This datasheet also covers the 74HC123 variant, as both devices belong to the same dual retriggerable monostable multivibrator family and are provided as variant models within a single manufacturer datasheet.

Description

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).

Features

  • 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 pu.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (74HC123-nexperia.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number 74HCT123D
Manufacturer Nexperia
File Size 317.40 KB
Description Dual retriggerable monostable multivibrator
Datasheet download datasheet 74HCT123D Datasheet

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
74HC123; 74HCT123 Dual retriggerable monostable multivibrator with reset Rev. 12 — 11 August 2021 Product data sheet 1. General description 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.