CAT1021 - Catalyst Semiconductor

CAT1021 Supervisory Circuits

The CAT1021, CAT1022 and CAT1023 are complete memory and supervisory solutions for microcontrollerbased systems. A 2k-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 400kHz I2C bus. The CAT1021 and CAT1023 provide a precision VCC sense circuit and.

Features

Precision Power Supply Voltage Monitor — 5V, 3.3V and 3V systems — Five threshold voltage options Watchdog Timer Active High or Low Reset — Valid reset guaranteed at VCC = 1V 400kHz I2C Bus 2.7V to 5.5V Operation Low power CMOS technology 16-Byte Page Write Buffer Built-in inadvertent write protection — WP pin (CAT1021) All supervisors have a 1.6 second watchdog timer circuit that resets a system to a known state if software or a Manual Reset Input hardware glitch halts or “hangs” the system. For the www.DataSheet4U.com CAT1021 and CAT1022, the watchdog timer monitors 100 year data retention t.