CAT1021WI-25-T3

Supervisors Overview

The CAT1021WI-25-T3 is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It features an integrated 2K EEPROM and operates within a supply voltage range of 2.7 V to 5.5 V. The device monitors a single input with a threshold voltage of 2.5 V and an under-voltage threshold of 2.55 V. It includes a manual reset function and a watchdog timer. The component is housed in an SOIC-8 surface-mount package and supports operation temperatures from -40°C to +85°C.

Supervisors Feature Summary

• Integrates a 2K EEPROM for data storage alongside voltage supervision capabilities.
• Includes a built-in watchdog timer to monitor system timing integrity.
• Supports manual reset functionality for user-initiated system recovery.

Supervisors Applications

• CPU power supply monitoring
• Embedded system voltage supervision
• Data retention protection circuits

Supervisors Procurement Notes

Verify component status as the manufacturer has issued discontinuance notifications. Confirm availability through authorized distributors or secondary market suppliers. Ensure RoHS compliance documentation is obtained. Validate package markings against datasheet specifications to prevent counterfeit risks during procurement.

Supervisors Selection Notes

Select this part when a combined supervisor and non-volatile memory solution is required in an SOIC-8 package. Verify that the 2.5 V threshold aligns with the target system's logic levels. Consider the end-of-life status when planning long-term production runs. Evaluate alternative packages if space constraints differ from standard SOIC dimensions.

Supervisors Part Context

This component belongs to the CAT1021 series of supervisory circuits. It shares functional similarities with other variants in the family but is distinguished by its specific 2.5 V threshold and SOIC-8 packaging. The series is designed for low-power embedded applications requiring reliable power management and data storage integration.

Supervisors Replacement Considerations

Check for direct pin-compatible substitutes within the CAT1021 family. Verify equivalent EEPROM capacity and watchdog functionality in potential replacements. Assess thermal performance and package compatibility for existing PCB layouts.