Tudi TC1232COA-TUDI

TC1232 is a fully integrated processor supervisory circuit that provides three critical functions for ensuring stable processor operation: precision power-on/power-off reset control, a watchdog timer, and external reset override. At power-up, after VCC enters the tolerance range, TC1232 holds the processor in reset for a minimum of 250ms to ensure stable system startup. Processor status is monitored by an on-board watchdog circuit. The microprocessor must provide a periodic active-low signal on the ST input pin. If the processor fails to provide this signal within the selected timeout period (150ms, 600ms, or 1200ms), it indicates a processor runaway condition, and TC1232 will assert a processor reset signal. When the PB input is pulled low by an external pushbutton switch or other electronic signal, the TC1232 output is immediately driven active. When connected to a pushbutton switch, TC1232 provides contact debouncing. TC1232 is available in space-saving 8-pin PDIP or SOIC packages, and a 16-pin SOIC (wide-body) package, and requires no external components.

• Precision voltage monitoring: adjustable +4.5V or +4.75V
• Reset pulse width – 250ms minimum
• No external components required
• Adjustable watchdog timer: 150ms, 600ms, or 1.2s
• Operating voltage 4.0V to 5.5V
• Manual reset input with debounce for external override

• Computers
• Controllers
• Intelligent Instruments
• Critical Microprocessor Power Monitoring