Nexperia B.V. Dual non-retriggerable monostable multivibrator with reset 74HCT221D,118

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Dual non-retriggerable monostable multivibrator with reset - 74HCT221D,118 - Nexperia B.V.
Nijmegen, Netherlands
Dual non-retriggerable monostable multivibrator with reset
74HCT221D,118
Dual non-retriggerable monostable multivibrator with reset 74HCT221D,118
The 74HC/74HCT221 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 74HC/HCT221 are dual non-retriggerable monostable multivibrators. Each multivibrator features an active LOW-going edge input (nA) and an active HIGH-going edge input (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 and are a function of the timing components. The output pulses can be terminated by the overriding active LOW reset inputs (nR D ). Input pulses may be of any duration relative to the output pulse. Pulse width stability is achieved through internal compensation and is virtually independent of VCC and temperature. In most applications pulse stability will only be limited by the accuracy of the external timing components. The output pulse width is defined by the following relationship: tW=CEXT REXT In2 tW= 0.7CEXT REXT Pin assignments for the '221' are identical to those of the '123' so that the '221' can be substituted for those products in systems not using the retrigger by merely changing the value of REXT and/or CEXT. Features and benefits Pulse width variance is typically less than ± 5% Pin-out identical to '123' Overriding reset terminates output pulse nB inputs have hysteresis for improved noise immunity Output capability: standard (except for nREXT /CEXT) ICC category: MSI

The 74HC/74HCT221 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 74HC/HCT221 are dual non-retriggerable monostable multivibrators. Each multivibrator features an active LOW-going edge input (nA) and an active HIGH-going edge input (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 and are a function of the timing components. The output pulses can be terminated by the overriding active LOW reset inputs (nR D ). Input pulses may be of any duration relative to the output pulse.

Pulse width stability is achieved through internal compensation and is virtually independent of VCC and temperature. In most applications pulse stability will only be limited by the accuracy of the external timing components.

The output pulse width is defined by the following relationship:

tW=CEXT REXT In2

tW= 0.7CEXT REXT

Pin assignments for the '221' are identical to those of the '123' so that the '221' can be substituted for those products in systems not using the retrigger by merely changing the value of REXT and/or CEXT.

Features and benefits

  • Pulse width variance is typically less than ± 5%
  • Pin-out identical to '123'
  • Overriding reset terminates output pulse
  • nB inputs have hysteresis for improved noise immunity
  • Output capability: standard (except for nREXT /CEXT)
  • ICC category: MSI
Supplier's Site Datasheet
Integrated Circuits (ICs) - Logic - Multivibrators - 74HCT221D,118 - Shenzhen Shengyu Electronics Technology Limited
Futian, China
Integrated Circuits (ICs) - Logic - Multivibrators
74HCT221D,118
Integrated Circuits (ICs) - Logic - Multivibrators 74HCT221D,118
IC MULTIVIBRATOR 31NS 16SO

IC MULTIVIBRATOR 31NS 16SO

Supplier's Site
Logic - Multivibrators - 74HCT221D,118 - Lingto Electronic Limited
Shenzhen, China
Logic - Multivibrators
74HCT221D,118
Logic - Multivibrators 74HCT221D,118
IC MULTIVIBRATOR 31NS 16SO

IC MULTIVIBRATOR 31NS 16SO

Supplier's Site Datasheet
Thief River Falls, MN, United States
Multivibrators
74HCT221D,118-ND
Multivibrators 74HCT221D,118-ND
Monostable Multivibrator 31ns 16-SO

Monostable Multivibrator 31ns 16-SO

Supplier's Site Datasheet
Multivibrators - 74HCT221D,118 - Quarktwin Technology Ltd.
Shenzhen, Guangdong, China
Multivibrators
74HCT221D,118
Multivibrators 74HCT221D,118
Monostable Multivibrator 31 ns 16-SO

Monostable Multivibrator 31 ns 16-SO

Supplier's Site Datasheet

Technical Specifications

  Nexperia B.V. Shenzhen Shengyu Electronics Technology Limited Lingto Electronic Limited DigiKey Quarktwin Technology Ltd.
Product Category Monostable Multivibrators Monostable Multivibrators Monostable Multivibrators Monostable Multivibrators Monostable Multivibrators
Product Number 74HCT221D,118 74HCT221D,118 74HCT221D,118 74HCT221D,118-ND 74HCT221D,118
Product Name Dual non-retriggerable monostable multivibrator with reset Integrated Circuits (ICs) - Logic - Multivibrators Logic - Multivibrators Multivibrators Multivibrators
Type Retriggerable Non-Retriggerable
Supply Voltage 5V; 4.5 - 5.5 4.5 V ~ 5.5 V
Features Master Reset Schmitt Trigger
Package Type Other; SO16 (SOT109-1) SOIC; Other; 16-SOIC (0.154", 3.90mm Width) SOIC; Other; 16-SOIC (0.154\", 3.90mm Width)
Logic Family TTL; TTL
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