CAT1027YI-28-GT3

Supervisors Overview

The CAT1027YI-28-GT3 is a voltage supervisory circuit manufactured by onsemi, designed for CPU supervision with integrated 2K EEPROM. It features an open collector/drain output and supports manual reset functionality. The device includes a watchdog timer and operates within a supply voltage range of -2 V to 7 V. It monitors one input and has a reset delay time of 5 us. The undervoltage threshold is specified between 2.85 V and 3 V. Operating temperatures range from -40 C to +85 C. The component is housed in a TSSOP-8 package and consumes 10 uA of working power supply current.

Supervisors Feature Summary

• Integrates 2K EEPROM for data storage alongside voltage supervision
• Includes built-in watchdog timer for system reliability
• Supports manual reset input for user control

Supervisors Applications

• CPU supervision in embedded systems
• Voltage monitoring in portable electronics
• Data retention in battery-powered devices

Supervisors Procurement Notes

Verify the exact suffix 'GT3' against official datasheets to confirm tape-and-reel packaging specifications. Confirm RoHS compliance status through manufacturer documentation. Check for obsolescence notices as this series may have limited availability. Ensure the TSSOP-8 footprint matches your PCB design requirements before procurement.

Supervisors Selection Notes

Select this component when both voltage supervision and non-volatile data storage are required in a single package. The integrated watchdog timer simplifies design for systems needing automatic recovery from software faults. Verify that the 2.85 V to 3 V undervoltage threshold aligns with your system's minimum operating voltage requirements.

Supervisors Part Context

This part belongs to the CAT1027 series of supervisory circuits which combine voltage monitoring with EEPROM capabilities. Unlike the CAT1021 series which lacks a watchdog, the CAT1027 includes this feature. The YI suffix indicates a TSSOP-8 package, while the 28 denotes the specific undervoltage threshold version. This integration reduces board space compared to using separate supervisor and memory ICs.

Supervisors Replacement Considerations

CAT1027WI-28-GT3 offers identical electrical characteristics but uses a SOIC-Wide-8 package instead of TSSOP-8. Verify pin compatibility and thermal performance if substituting due to package differences. No other direct functional equivalents with integrated EEPROM and watchdog are confirmed in public documentation.