CAT1021WI-30-GT3

Supervisors Overview

The CAT1021WI-30-GT3 is a voltage supervisory circuit manufactured by onsemi, housed in an SOIC-8 surface-mount package. It integrates a 2k-bit CMOS EEPROM with I2C serial interface capabilities. The device monitors a single input with an undervoltage threshold of 3 V to 3.15 V and an overvoltage threshold of 3.15 V. Operating within a supply voltage range of 2.7 V to 5.5 V, it features a manual reset function, a watchdog timer, and a reset delay time of 200 ms. The output supports active high, active low, and open drain configurations. It operates between -40°C and +85°C with a typical supply current of 3 mA.

Supervisors Feature Summary

• Integrates nonvolatile 2k-bit EEPROM with I2C serial communication for data retention.
• Provides comprehensive power management through combined undervoltage and overvoltage detection.
• Includes a configurable watchdog timer to ensure system reliability during operation.

Supervisors Applications

• CPU power supply monitoring in embedded systems
• Data storage protection via integrated EEPROM
• Industrial control systems requiring manual reset functionality

Supervisors Procurement Notes

Verify component authenticity and datasheet revision status due to end-of-life designation. Confirm RoHS compliance documentation availability. Check for obsolescence notices from onsemi. Validate package integrity upon receipt. Ensure compatibility with existing design specifications before final procurement decisions.

Supervisors Selection Notes

Select this component when simultaneous voltage supervision and nonvolatile data storage are required in a compact form factor. The integrated I2C EEPROM eliminates the need for external memory chips. Consider the specific threshold voltages and reset timing requirements against system constraints. Evaluate the SOIC-8 package suitability for the target PCB layout and thermal management needs.

Supervisors Part Context

This part belongs to the CAT1021 series of supervisory circuits from onsemi. It combines power management functions with memory capabilities, distinguishing it from basic voltage supervisors. The series targets applications needing reliable system reset mechanisms alongside persistent data storage for configuration or calibration values.

Supervisors Replacement Considerations

Public confirmed substitute part numbers: None identified in available documentation.