CAT1641WI-28

Supervisors Overview

The CAT1641WI-28 is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a 64K EEPROM and features an I2C serial interface. The device operates within a supply voltage range up to 5.5V and includes a manual reset input. Key electrical parameters include a threshold voltage of 2.8V or 3V, a reset delay time of 270 ms, and an active high/open drain output type. It lacks a watchdog timer and battery backup switch. The component supports surface mount installation in an 8-SOIC package and functions reliably across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates 64K EEPROM with I2C serial communication interface
• Provides manual reset capability for system control
• Features active high and open drain output configurations

Supervisors Applications

• CPU voltage supervision
• Embedded systems monitoring
• Industrial control units

Supervisors Procurement Notes

Verify the specific suffix (e.g., T3, TE13) for packaging details as availability varies. Confirm RoHS compliance status through official documentation. Check current lifecycle status as some variants may be discontinued. Ensure the correct threshold voltage matches the target application requirements before procurement.

Supervisors Selection Notes

Select this component when integrated memory and I2C connectivity are required alongside voltage supervision. Verify that the 270 ms reset delay meets system timing constraints. Ensure the operating temperature range aligns with the deployment environment. Confirm compatibility with the host controller's I2C bus specifications.

Supervisors Part Context

This part belongs to the CAT1641 series of supervisory circuits from onsemi. It combines power management monitoring with non-volatile storage capabilities. The series targets applications requiring reliable system reset and data retention under varying voltage conditions.

Supervisors Replacement Considerations

Check for CAT1641LI-30-G for through-hole alternatives. Consider CAT1021WI-28-GT3 if watchdog functionality is needed instead of EEPROM integration.