CAT1021YI-42-G

Supervisors Overview

The CAT1021YI-42-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU systems with integrated 2K-bit EEPROM. It operates within a supply voltage range of 2.7 V to 5.5 V and features a threshold voltage of 4.2 V. The device includes manual reset capability and a watchdog timer. It is housed in an SOIC-8 surface-mount package and supports operation across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates a 2k-bit serial EEPROM memory with system power supervision for microcontroller-based applications
• Provides precise power supply voltage monitoring with manual reset functionality
• Includes a built-in watchdog timer to ensure system reliability

Supervisors Applications

• Microcontroller-based system power management
• CPU voltage supervision
• Data retention systems requiring EEPROM integration

Supervisors Procurement Notes

Verify the specific suffix 'YI' against official datasheets to confirm package type and temperature grade. Confirm RoHS compliance status through manufacturer documentation. Check current lifecycle status as distribution availability may vary. Ensure pinout compatibility with existing PCB layouts before procurement.

Supervisors Selection Notes

Select this component when a combined supervisory circuit and non-volatile memory solution is required. The 4.2 V threshold suits specific 5 V or 3.3 V system architectures. Verify that the SOIC-8 package fits the design constraints. Consider the manual reset and watchdog features if system stability is critical.

Supervisors Part Context

This part belongs to the CAT1021 series, which combines voltage supervision with I2C-compatible serial EEPROM. It is distinct from variants lacking watchdog timers or manual resets. The series targets embedded systems needing both memory storage and power monitoring in a single package.

Supervisors Replacement Considerations

Check for CAT1021WI-42 or CAT1021ZI-42-G equivalents. Verify package and feature parity. Confirm lifecycle status matches project requirements.