CAT1161WI-45-T3

Supervisors Overview

The CAT1161WI-45-T3 is a supervisory circuit manufactured by onsemi, designed for microcontroller-based systems. It integrates a 16K serial EEPROM with hardware write protection, a power supply supervisor, and a watchdog timer. The device operates within a voltage range of 2.7 V to 6 V, featuring a 4.5 V under-voltage threshold and a 4.75 V over-voltage threshold. It utilizes an I²C bus interface for memory access and monitors the SDA line for watchdog functionality. The component supports active high, active low, and open drain outputs with manual reset capability. It is housed in an 8-SOIC package and functions reliably across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates 16K serial EEPROM with hardware write protection and I²C interface
• Includes system power supervisor with brown-out protection and manual reset
• Features watchdog timer that monitors the SDA line without additional traces

Supervisors Applications

• Microcontroller-based system supervision
• Data storage with hardware protection
• Power management in embedded devices

Supervisors Procurement Notes

Verify component authenticity through authorized channels as this part is listed as End-of-Life (EOL). Confirm specific suffix compatibility if substituting from other CAT1161 variants. Check RoHS compliance status against current project requirements. Ensure sourcing from reputable distributors to avoid counterfeit risks associated with discontinued semiconductor components.

Supervisors Selection Notes

Select this component when a combined solution for memory storage and system supervision is required. It is suitable for designs needing integrated brown-out protection and watchdog functionality without external components. Consider the 8-SOIC package constraints and I²C interface requirements during PCB layout. Evaluate thermal performance within the specified operating temperature range for the target application environment.

Supervisors Part Context

This part belongs to the CAT1161/2 series of supervisory circuits with integrated EEPROM. It shares features with the CAT1162 but includes a watchdog timer, which the CAT1162 lacks. Other variants in the family include different voltage thresholds and package options. The series is designed to simplify microcontroller system design by combining multiple critical functions into a single CMOS chip.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The component is marked as End-of-Life (EOL). Designers should consult official obsolescence notices or contact the manufacturer for potential last-time buy information or recommended alternatives.