CAT1163WI-28-T3

Supervisors Overview

The CAT1163WI-28-T3 is a voltage supervisory circuit manufactured by onsemi, designed for CPU supervision with integrated 16K EEPROM. It operates within a supply voltage range of 2.7 V to 6 V and features a threshold voltage of 2.8 V with an overvoltage threshold of 3 V. The device includes a manual reset input, a watchdog timer, and offers active high, active low, or open drain output types. It has a reset delay time of 270 ms and consumes 3 mA of operating current. The component is housed in an SOIC-Wide-8 package and supports industrial temperature ranges from -40°C to +85°C.

Supervisors Feature Summary

• Integrates 16K EEPROM for non-volatile data storage alongside voltage supervision functions
• Includes a built-in watchdog timer to monitor system operation integrity
• Provides flexible output configurations including active high, active low, and open drain options
• Supports manual reset functionality for controlled system recovery

Supervisors Applications

• CPU power supply monitoring in embedded systems
• Data retention applications requiring integrated memory and supervision
• Industrial control systems requiring watchdog protection
• Consumer electronics with strict power management requirements

Supervisors Procurement Notes

Verify the exact suffix T3 confirms tape and reel packaging when sourcing. Confirm RoHS compliance status through official datasheets as environmental declarations may vary by production batch. Check for obsolescence notices since this part number indicates end-of-life status in some distributor records. Ensure compatibility with existing PCB footprints for SOIC-Wide-8 packages during replacement planning.

Supervisors Selection Notes

Select this component when both voltage supervision and persistent data storage are required in a single package. Compare threshold voltages against target supply rails to ensure proper reset triggering. Consider the 270 ms reset delay relative to microprocessor startup times. Evaluate the need for watchdog functionality versus simpler supervisor alternatives if memory is not required.

Supervisors Part Context

This part belongs to the CAT1163 family of supervisory circuits that combine voltage monitoring with EEPROM capabilities. Similar variants exist with different threshold voltages such as CAT1163WI-30-T3 and CAT1163WI-45-T3. The WI suffix typically denotes wide-body SOIC packaging suitable for higher power dissipation. The T3 suffix indicates reel packaging for automated assembly processes.

Supervisors Replacement Considerations

CAT1163WI-30-T3 serves as a functional substitute with a 3.0 V threshold instead of 2.8 V. CAT1163WI-45-T3 offers similar features but with a 4.5 V threshold rating. Verify electrical parameters match application requirements before substitution. Package compatibility remains consistent across these variants.