CAT1025WI28

Supervisors Overview

The CAT1025WI28 is a voltage supervisory circuit manufactured by onsemi, designed for CPU systems with integrated 2K-bit CMOS EEPROM. It operates within a supply voltage range of 2.7 V to 5.5 V and features a threshold voltage of 2.8 V. The device includes manual reset functionality and lacks a watchdog timer. It supports I²C serial communication at up to 400 kHz and offers overvoltage protection at 3 V. The component is housed in an SOIC-Wide-8 package, suitable for surface mount installation, and functions across an industrial temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Integrates a precision power supply voltage monitor with a 2.8 V threshold for reliable system supervision.
• Includes a 2K-bit CMOS EEPROM with I²C serial interface and built-in inadvertent write protection via the WP pin.
• Provides manual reset input capability with valid reset output guaranteed down to 1 V supply voltage.

Supervisors Applications

• CPU supervisor circuits requiring memory retention during power fluctuations
• Industrial control systems operating within extended temperature ranges
• Embedded devices needing non-volatile data storage with power monitoring

Supervisors Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to end-of-life status. Confirm RoHS compliance and specific packaging variants (tube vs. reel) against current inventory records. Request official datasheets and PCN documents to ensure technical specifications match design requirements before procurement.

Supervisors Selection Notes

Select this component when a combined voltage supervisor and small EEPROM is required for single-channel monitoring. Ensure the 2.8 V threshold aligns with the target system's logic levels. Consider the SOIC-Wide-8 package dimensions for PCB layout compatibility. Verify that manual reset functionality suffices without needing a watchdog timer.

Supervisors Part Context

Part of the CAT1025 series supervisory circuits, which combine power management monitoring with serial EEPROM storage. This model specifically utilizes the wide-body SOIC package variant, distinguishing it from standard SOIC or MSOP packages within the same family while maintaining identical electrical characteristics.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available as the component is listed as discontinued. Evaluate equivalent supervisory circuits with integrated EEPROM from other manufacturers if functional replacement is necessary.