onsemi CAT1163LI-25-G

CPU Supervisor with 16 k Serial EEPROM Memory

Processor Supervisor 3V/3.3V/5V 8-Pin PDIP Rail

IC SUPERVSR CPU 16K EEPROM 8DIP

SPECIALTY MICROPROCESSOR CIRCUIT PDIP8

The CAT1163 is a complete memory and supervisory solution for microcontroller-based systems. A serial EEPROM memory (16K) with hardware memory write protection a system power supervisor with brown out protection and a watchdog timer are integrated together in low power CMOS technology. Memory interface is via an IC bus. The 1.6-second watchdog circuit returns a system to a known good state if a software or hardware glitch halts or hangs the system. The CAT1163 watchdog monitors the WDI input pin. The power supply monitor and reset circuit protects memory and system controllers during power up/down and against brownout conditions. Five reset threshold voltages support 5.0 V 3.3 V and 3.0 V systems. If power supply voltages are out of tolerance reset signals become active preventing the system microcontroller ASIC or peripherals from operating. Reset signals become inactive typically 200 ms after the supply voltage exceeds the reset threshold level. With both active high and low reset signals interface to microcontrollers and other ICs is simple. In addition a reset pin can be used as debounced input for push-button manual reset capability. The CAT1163 memory