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aip74hc/hct123
dual retriggerable monostable multivibrator with reset

the aip74hc/hct123 are high-speed si-gate cmos devices and are pin compatible with low-power schottky ttl (lsttl).

the aip74hc/hct123 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 makes it possible to trigger the circuit by a high-going signal at input nrd().


  • 主要特点

  • 产品文档

  • dc triggered from active high or active low inputs

  • retriggerable for very long pulses up to 100% duty factor

  • direct reset terminates output pulse

  • specified from -40℃ to 105℃

  • packaging information: dip16/sop16/tssop16


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