CAT1021YI-25-G

Supervisors Overview

The CAT1021YI-25-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It operates within a supply voltage range of 2.7 V to 5.5 V and features a threshold voltage of 2.5 V with an overvoltage threshold of 2.7 V and an undervoltage threshold of 2.55 V. The device includes a manual reset function and a watchdog timer, consuming 3 mA of operating current. It is housed in a TSSOP-8 surface-mount package and supports an extended industrial temperature range from -40°C to +125°C.

Supervisors Feature Summary

• Integrates voltage supervision with a built-in watchdog timer for enhanced system reliability
• Supports manual reset functionality for controlled system recovery
• Operates across an extended industrial temperature range up to +125°C

Supervisors Applications

• CPU voltage monitoring in embedded systems
• Industrial control units requiring extended temperature operation
• Power management circuits with watchdog protection needs

Supervisors Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for recent Product Change Notifications (PCN) regarding manufacturing site or material changes. Ensure the specific suffix matches design requirements before procurement.

Supervisors Selection Notes

Select this part when an integrated solution combining voltage supervision and watchdog timing is required. The TSSOP-8 package suits space-constrained designs. Verify that the 2.5 V threshold aligns with the target system's logic levels and that the 3 mA quiescent current fits power budget constraints.

Supervisors Part Context

This component belongs to the CAT1021 series of supervisory circuits from onsemi. The series provides various threshold voltages and packages. The YI suffix indicates the TSSOP-8 surface mount package, while the 25 denotes the 2.5 V threshold setting. This specific variant is optimized for industrial environments.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate other CAT1021 variants with matching thresholds and packages only after verifying pin compatibility and functional equivalence.