CAT1025WI25

Supervisors Overview

The CAT1025WI-25-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU systems. It integrates a 2k-bit CMOS EEPROM with I²C serial interface and manual reset functionality. The device operates within a supply voltage range of 2.7 V to 5.5 V and features a threshold voltage of 2.5 V. It supports active high, active low, or open drain outputs. Packaged in an SOIC-8 surface-mount format, it lacks a watchdog timer but includes built-in write protection via the WP pin.

Supervisors Feature Summary

• Integrates a 2k-bit serial EEPROM with I²C bus interface for data storage alongside power monitoring.
• Provides manual reset input capability for system control without automatic watchdog timing.
• Includes built-in inadvertent write protection through a dedicated WP pin to safeguard memory integrity.

Supervisors Applications

• Microcontroller-based systems requiring combined memory and supervision
• CPU power supply monitoring circuits
• Data retention applications in industrial environments

Supervisors Procurement Notes

Verify component authenticity and datasheet alignment due to end-of-life status. Confirm package variant matches design requirements as distributors may list obsolete stock. Check RoHS compliance documentation for specific manufacturing dates. Ensure replacement strategies are evaluated given discontinuation notices from major manufacturers.

Supervisors Selection Notes

Select this component when a single-chip solution combining 2k-bit EEPROM storage and voltage supervision is required. The I²C interface minimizes pin count compared to parallel alternatives. Verify that the absence of a watchdog timer aligns with system reliability needs. Ensure the SOIC-8 package fits the PCB layout constraints.

Supervisors Part Context

Part of the CAT1024/CAT1025 family offering supervisory circuits with integrated serial EEPROM. The CAT1025 variant specifically adds write protection capabilities not present in the CAT1024 series. Designed for industrial and extended temperature ranges using low-power CMOS technology.

Supervisors Replacement Considerations

CAT1025ZI-25-T3 (TSSOP-8 package) and CAT1025LI-25-G (PDIP-8 package) offer similar functionality with different form factors. Verify electrical parameters match before substitution.