onsemi CAT1022LI-25-G

Voltage Supervisor/Reset IC, Fixed, 1 Channel, +2.625V, CMOS, PDIP8

Volt Supervisor Monitor 3V/3.3V/5V 8-Pin PDIP Rail

CPU Supervisor with 2 k EEPROM Memory

IC SUPERVISR CPU 2K EEPROM 8DIP

1-CHANNEL POWER SUPPLY SUPPORT CKT PDIP8

The CAT1022 is a complete memory and supervisory solution for microcontroller based systems. A 2 k-bit serial EEPROM memory and a system power supervisor with brown-out protection are integrated together in low power CMOS technology. Memory interface is via a 400 kHz IC bus. The CAT1022 has a RESET output and does not have a Write Protect input. The supervisor has a 1.6 second watchdog timer circuit that resets a system to a known state if software or a hardware glitch halts or hangs the system. The watchdog timer monitors the SDA signal. The power supply monitor and reset circuit protect 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 the RESET pin or a separate input MR can be used as an input for push-button manual reset capability. The on-chip 2 k-bit EEPROM memory