CAT1025

CAT1024, CAT1025 Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM and Manual Reset FEATURES Precision Power Supply Voltage Monitor — 5V, 3.3V and 3V systems — Five threshold voltage options 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 (CAT1025) 1,000,000 Program/Erase cycles Manual Reset Input 100 year data retention Industrial and extended temperature ranges Green packages available with NiPdAu Lead finished DESCRIPTION The CAT1024 and CAT1025 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 techno– logy. Memory interface is via a 400kHz I2C bus. The CAT1025 provides a precision VCC sense circuit and two open drain outputs: one (RESET) drives high ¯¯¯¯¯¯) drives low whenever VCC falls and the other (RESET below the reset threshold voltage. The CAT1025 also has a Write Protect input (WP). Write operations are disabled if WP is connected to a logic high. The CAT1024 also provides a precision VCC sense ¯¯¯¯¯¯ output and does not circuit, but has only a RESET have a Write Protect input. www.DataSheet4U.com For Ordering Information details, see page 19. The power supply monitor and reset circuit protect memory and system controllers during power up/down and aga...