74HCT221 Dual non-retriggerable monostable multivibrator with reset Rev.
3 — 26 October 2016 Product data sheet 1.
General description The 74HCT221 is a dual non-retriggerable monostable multivibrator.
Each multivibrator features edge-triggered inputs (nA and nB), either of which can be used as an enable input.
Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input pulse.
Schmitt-trigger input circuitry for the nB inputs allow jitter-free triggering from inputs with slow transition rates, providing the circuit with excellent noise immunity.
Once triggered, the outputs (nQ, nQ) are independent of further transitions of nA and...

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