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74HCT221 - Dual non-retriggerable monostable multivibrator

General Description

The 74HCT221 is a dual non-retriggerable monostable multivibrator.

Key Features

  • Input levels:.
  • For 74HCT221: TTL level.
  • Pulse width variance is typically less than 5%.
  • Direct reset terminates output pulse.
  • Schmitt-trigger action on nB inputs.
  • ESD protection:.
  • HBM JESD22-A114F exceeds 2000 V.
  • MM JESD22-A115-A exceeds 200 V.
  • Specified from 40 C to +85 C and from 40 C to +125 C 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name 74HCT221D 40 C to +125 C SO16.

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Datasheet Details

Part number 74HCT221
Manufacturer Nexperia
File Size 778.16 KB
Description Dual non-retriggerable monostable multivibrator
Datasheet download datasheet 74HCT221 Datasheet

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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.

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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 nB inputs. The output pulse width is defined by the following relationship: tW = 0.