onsemi Supervisors CAT1025ZD4I-42T3

The CAT1025ZD4I-42T3 is a supervisory circuit designed for microcontroller-based systems, integrating a 2k-bit EEPROM memory and a power supervisor with brown-out protection. It operates on a 400 kHz I2C bus and supports supply voltages from 2.7 V to 5.5 V. The device features a precision VCC sense circuit, providing two open-drain outputs for reset signals: one active high and one active low, ensuring reliable system reset during power fluctuations. This part includes a Write Protect (WP) input, allowing write operations to be disabled when WP is set high. It also incorporates a watchdog timer that resets the system if it becomes unresponsive. The CAT1025 supports multiple reset threshold voltages suitable for 5 V, 3.3 V, and 3 V systems, with reset signals becoming inactive approximately 200 ms after the supply voltage exceeds the threshold. The device is available in various packages, including an 8-pin TDFN with a compact footprint of 3 x 3 mm and a maximum height of 0.8 mm. It is suitable for industrial applications, with an operating temperature range of -40¬8C to 125¬8C and offers 100 years of data retention.