CAT1163WI-25

Supervisors Overview

The CAT1163WI-25 is a supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a 16K serial EEPROM with hardware write protection, a voltage supervisor, and a watchdog timer within a single SOIC-8 package. The device monitors a single input channel with a threshold voltage of 2.5 V. Key electrical parameters include an overvoltage threshold of 2.7 V, an undervoltage threshold of 2.55 V, and a reset delay time of 270 ms. It operates on a supply voltage range from 2.7 V to 6 V, with a maximum power dissipation of 1 W. The component supports active high, active low, and open drain outputs and includes manual reset functionality.

Supervisors Feature Summary

• Integrates 16K serial EEPROM with hardware memory write protection and I2C interface
• Provides system power supervision with brown-out protection and precise reset timing
• Includes a watchdog timer that monitors the SDA line to detect software or hardware glitches

Supervisors Applications

• Microcontroller-based systems requiring integrated memory and supervision
• CPU monitoring circuits in embedded devices
• Systems needing hardware-enforced data integrity via protected EEPROM

Supervisors Procurement Notes

Verify component authenticity through authorized distributors as the part status may be discontinued. Confirm RoHS compliance details and specific suffix variations against official datasheets. Check for availability constraints or regional sales restrictions before procurement planning. Ensure the selected variant matches the required package and output configuration for the design.

Supervisors Selection Notes

Select this component when a combined solution for non-volatile storage and system supervision is required. The integrated watchdog eliminates the need for additional PC board traces by monitoring the SDA line. Consider the operating temperature range and supply voltage limits to ensure compatibility with the target application environment and power architecture.

Supervisors Part Context

The CAT1163 belongs to the CAT1161/2 family of supervisory circuits featuring I2C serial CMOS EEPROM. This family combines memory, power supervision, and watchdog functions in low-power CMOS technology. The CAT1163 specifically distinguishes itself by including the watchdog timer, whereas lower-cost variants like the CAT1162 omit this feature while retaining the memory and supervision capabilities.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.