TC1232 is a fully-integrated processor supervisor. It provides three important functions to safeguard processor sanity: precision power on/off reset control, watchdog timer and external reset override. On power-up, the TC1232 holds the processor in the reset state for a minimum of 250msec after VCC is within tolerance to ensure a stable system start-up. Microprocessor sanity 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 (150msec, 600msec or 1200msec), an out-of-control processor is indicated and the TC1232 issues a processor reset as a result. The outputs of the TC1232 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 TC1232 provides contact debounce. The TC1232 is packaged in a space-saving 8-pin plastic DIP or SOIC package and requires no external components.
Additional Features
| Microchip Technology, Inc. | |
|---|---|
| Product Category | Supervisory Circuits and Battery Monitor Chips |
| Product Number | en010690 |
| Product Name | Microprocessor Monitor w/ Watchdog Timer |
| Features | Watchdog Timer; Manual Reset |
| Output Options | Open Drain; Push-Pull |
| Type | SOIC; DIP; ['SOIC', 'PDIP'] |
| IQ | 50 µA |
