DESCRIPTION
The CAT1021, CAT1022 and CAT1023 are complete memory and supervisory solutions for microcontroller-based 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.

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)
■ 1,000,000 Program/Erase cycles
■ Manual Reset Input
■ 100 year data retention
■ Industrial and extended temperature ranges
■ 8-pin DIP, SOIC, TSSOP, MSOP or TDFN (3 x 3mm foot-print) packages
    — TDFN max height is 0.8mm