CAT1641 Datasheet | onsemi

.. CAT1640, CAT1641 Supervisory Circuits with I C Serial 64K CMOS EEPROM Features s Precision power supply voltage monitor s 3.0V to 5.5V operation s Low power CMOS technology s 64-Byte page write buffer s 1,000,000 Program/Erase cycles s 100 year data retention GEN FR ALO A D F R E ETM - 5V, 3.3V and 3V systems - +5.0V (+/- 5%, +/- 10%) - +3.3V (+/- 5%, +/- 10%) - +3.0V (+/- 10%) s Active low reset, CAT1640 s Active high reset, CAT1641 s Valid reset guaranteed at VCC=1V s 400k Hz I2C bus s 8-pin DIP, SOIC, TSSOP and TDFN packages s Industrial temperature range DESCRIPTION The CAT1640 and CAT1641 are plete memory and supervisory solutions for microcontroller-based systems. A 64kbit 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 400k Hz I2C bus. active, preventing the system microcontroller, ASIC or peripherals from operating. Reset signals bee 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 (CAT1640) pin can be used as an input for push-button manual reset capability. The CAT1640 provides a precision VCC sense circuit and drives an open drain output, RESET low whenever The CAT1640/41 memory Features a 64-byte page. In addition, hardware data protection is provided by a VCC VCC falls below the reset threshold voltage. sense circuit that prevents writes to memory whenever VCC The CAT1641 provides a precision VCC sense circuit falls below the reset threshold or until VCC reaches the reset that drives an open drain output, RESET high whenever threshold during power up. VCC falls below the reset threshold voltage. Available packages include an 8-pin DIP, SOIC, TSSOP The power supply monitor and reset circuit protect and 4.9 x 3mm TDFN. memory and system...