CAT1025WI42

Supervisors Overview

The CAT1025WI42 is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It features a single input channel with a threshold voltage of 4.2 V and an overvoltage threshold of 4.5 V. The device supports manual reset functionality without a watchdog timer or battery backup switch. Operating within a supply voltage range of 2.7 V to 5.5 V, it utilizes an SOIC-8 surface-mount package. The component operates between -40°C and +85°C, consumes 3 mA of supply current, and dissipates up to 1 W of power.

Supervisors Feature Summary

• Integrates voltage supervision with integrated 2K EEPROM storage for CPU systems
• Provides manual reset capability with active high, active low, and open drain output options
• Supports surface-mount installation in compact SOIC-8 packaging

Supervisors Applications

• CPU power supply monitoring
• Voltage supervision in embedded systems
• Data retention in microcontroller circuits

Supervisors Procurement Notes

Verify component authenticity through authorized distributors due to end-of-life status. Confirm RoHS compliance details via official datasheets. Check for obsolescence notices from onsemi. Validate package integrity upon receipt. Ensure storage conditions meet manufacturer specifications to prevent degradation.

Supervisors Selection Notes

Select this part for designs requiring combined supervision and non-volatile memory in a small footprint. Compare threshold voltages against system requirements. Consider the SOIC-8 package for SMT assembly processes. Evaluate thermal dissipation capabilities within the operating temperature range. Verify compatibility with existing PCB layouts and pin configurations.

Supervisors Part Context

This component belongs to the CAT1025 series of supervisory circuits. It shares functional similarities with other parts in the family but differs in package type and specific threshold settings. The WI suffix indicates the SOIC-8 surface-mount variant. Related models include CAT1025LI variants for through-hole applications and CAT1021 series with watchdog features.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The component is listed as obsolete. Engineers should consult onsemi for recommended replacements or evaluate alternative supervisory ICs with similar electrical characteristics and package dimensions.