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NCP1232 Datasheet Microprocessor Monitor

Manufacturer: ON

Overview: NCP1232 Microprocessor Monitor The NCP1232 is a fully-integrated processor supervisor. It provides three important functions to safeguard processor functionality: precision power on/off reset control, watchdog timer and external reset override. On power-up, the NCP1232 holds the processor in the reset state for a minimum of 250 msec after VCC is within tolerance to ensure a stable system start-up. Microprocessor functionality is monitored by the on- board watchdog circuit. The microprocessor must provide a periodic low-going signal on the ST input. Should the processor fail to supply this signal within the selected time-out period (150 msec, 600 msec or 1200 msec), an out- of- control processor is indicated and the NCP1232 issues a processor reset as a result. The outputs of the NCP1232 are immediately driven active when the PB input is brought low by an external push-button switch or other electronic signal. When connected to a push-button switch, the NCP1232 provides contact debounce. The NCP1232 is packaged in a space-saving 8-pin plastic SOIC package and requires no external ponents.

Key Features

  • Precision Voltage Monitor (Adjustable +4.5 V or +4.75 V).
  • Reset Pulse Width (250 msec Min).
  • No External Components.
  • Adjustable Watchdog Timer (150 msec, 600 msec or 1.2 sec).
  • Debounced Manual Reset Input for External Override.

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NCP1232 Distributor