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74HC123

Part Number	74HC123
Manufacturer	NXP
Description	Dual retriggerable monostable multivibrator
Published	Jun 29, 2014
Detailed Description	74HC123; 74HCT123 Dual retriggerable monostable multivibrator with reset Rev. 10 — 3 December 2015 Product data sheet...
Datasheet	74HC123 PDF File

Overview

74HC123; 74HCT123 Dual retriggerable monostable multivibrator with reset Rev.
10 — 3 December 2015 Product data sheet 1.
General description The 74HC123; 74HCT123 are high-speed Si-gate CMOS devices and are pin compatible with Low-power Schottky TTL (LSTTL).
They are specified in compliance with JEDEC standard no.
7A.
The 74HC123; 74HCT123 are dual retriggerable monostable multivibrators with output pulse width control by three methods: 1.
The basic pulse is programmed by selection of an external resistor (REXT) and capacitor (CEXT).
2.
Once triggered, the basic output pulse width may be extended by retriggering the gated active LOW-going edge input (nA) or the active HIGH-going edge input (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, which also inhibits the triggering.
3.
An internal connection from nRD to the input gates ...

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