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74HC5555; 74HCT5555

Programmable delay timer with oscillator

The 74HC5555 is a precision programmable delay timer which consist of:

  • 24-stage binary counter

  • integrated oscillator (using external timing components)

  • retriggerable/non-retriggerable monostable

  • automatic power-ON reset

  • output control logic

  • oscillator control logic

  • overriding asynchronous master reset (MR).

The 74HC5555 inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

特性

  • Supply voltage range from 2.0 V to 6.0 V

  • CMOS input levels

  • Positive and negative edge triggered

  • Retriggerable or non-retriggerable

  • Programmable delay:

    • minimum: 100 ns

    • maximum: depends on input frequency and division ratio

  • Divide-by range of 2 to 224

  • Direct reset terminates output pulse

  • Very low power consumption in triggered start mode

  • 3 oscillator operating modes:

    • RC oscillator

    • Crystal oscillator

    • External oscillator

  • Device is unaffected by variations in temperature and VCC when using an external oscillator

  • Automatic power-ON reset

  • Schmitt trigger action on both trigger inputs

  • Direct drive for a power transistor

  • High precision due to digital timing

  • Complies with JEDEC standard no. 7 A

  • ESD protection:

    • HBM EIA/JESD22-A114A exceeds 2000 V

    • MM EIA/JESD22-A115-A exceeds 200 V

  • Specified from -40 °C to +85 °C and -40 °C to +125 °C

目标应用

  • Motor control

  • Delay circuits

  • Precision timing

  • Domestic appliances

文档 (1)

文件名称标题类型日期
74HC5555Programmable delay timer with oscillatorData sheet2018-07-05

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