CAT1320

www.DataSheet4U.com CAT1320, CAT1321 Supervisory Circuits with I2C Serial 32K CMOS EEPROM FEATURES I Precision power supply voltage monitor I 3.0V to 5.5V operation I Low power CMOS technology I 64-Byte page write buffer I 1,000,000 Program/Erase cycles I 100 year data retention H GEN FR ALO EE LE A D F R E ETM — 5V, 3.3V and 3V systems - +5.0V (+/- 5%, +/- 10%) - +3.3V (+/- 5%, +/- 10%) - +3.0V (+/- 10%) I Active low reset, CAT1320 I Active high reset, CAT1321 I Valid reset guaranteed at VCC=1V I 400kHz I2C bus I 8-pin DIP, SOIC, TSSOP and TDFN packages I Industrial temperature range DESCRIPTION The CAT1320 and CAT1321 are complete memory and supervisory solutions for microcontroller-based systems. A 32kbit 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. 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 options, interface to microcontrollers and other ICs is simple. In addition, the RESET (CAT1320) pin can be used as an input for push-button manual reset capability. The CAT1320 provides a precision VCC sense circuit and drives an open drain output, RESET low whenever The CAT1320/21 memory features a 64-byte page. In addition, hardware data protection is provided by a VC...