CAT140021LWI-GT3

Supervisors Overview

The CAT140021LWI-GT3 is a voltage supervisory circuit manufactured by onsemi, designed for monitoring single-input power rails. It integrates a 2k-bit I2C serial EEPROM within the supervisor package. The device operates within a supply voltage range of 2.5 V to 5.5 V and features selectable under-voltage thresholds of 2.5 V, 3 V, 3.3 V, or 5 V. It includes an over-voltage threshold of 4.7 V and an under-voltage threshold of 4.56 V. The component draws 1 mA of operating current and functions reliably across a temperature range of -40°C to +85°C. It is housed in an SOIC-8 surface-mount package.

Supervisors Feature Summary

• Integrates a 2k-bit I2C serial EEPROM with the voltage supervision function
• Provides configurable under-voltage detection thresholds
• Includes over-voltage protection capabilities
• Operates without manual reset or watchdog timer requirements

Supervisors Applications

• Monitoring CPU power supplies in embedded systems
• Data retention management via integrated EEPROM
• Industrial control system power rail supervision
• Consumer electronics power management units

Supervisors Procurement Notes

Verify component authenticity through authorized distributors as this part is marked as obsolete. Confirm lot traceability and RoHS compliance status prior to acquisition. Check for alternative sourcing channels due to limited availability. Ensure storage conditions meet manufacturer specifications to maintain integrity. Validate pinout compatibility with existing PCB layouts before procurement.

Supervisors Selection Notes

Select this component when simultaneous power supervision and non-volatile data storage are required in a compact form factor. Consider the specific threshold voltages needed for the target application. Evaluate the I2C interface compatibility with the host microcontroller. Assess the SOIC-8 package constraints against board space limitations. Review the operating temperature range against environmental conditions.

Supervisors Part Context

This part belongs to the CAT14002 series of supervisory circuits with integrated memory. It combines power management monitoring with data logging capabilities. The series targets applications requiring reliable power tracking and configuration storage. It represents a consolidated solution reducing component count in power-sensitive designs.

Supervisors Replacement Considerations

Public confirmed substitute part numbers: None identified.