CAT1163LI-42-G

Supervisors Overview

The CAT1163LI-42-G is a supervisory circuit manufactured by onsemi, designed for CPU systems with integrated I2C serial CMOS EEPROM. It features a precision reset controller and a watchdog timer. The device operates within a supply voltage range of 2.7 V to 6 V. The undervoltage threshold is set at 4.25 V, while the overvoltage threshold is 4.5 V. The reset delay time is 270 ms. It supports manual reset functionality and offers active high, active low, or open drain output types. The component is housed in an 8-pin PDIP package and functions across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates a system power supervisor with brown-out protection and I2C serial CMOS EEPROM memory.
• Includes a precision reset controller with configurable output polarity options.
• Features a built-in watchdog timer to monitor system software execution.
• Supports manual reset input for controlled system initialization.

Supervisors Applications

• Microcontroller-based system power monitoring
• CPU supervision with data storage requirements
• Industrial control systems requiring watchdog protection

Supervisors Procurement Notes

Verify the specific suffix 'LI' and threshold voltage '42' against current onsemi datasheets, as legacy Catalyst part numbers may have variations in pinout or electrical characteristics compared to newer revisions. Confirm RoHS compliance status and lead-free marking if required for assembly processes. Check for obsolescence notices from the manufacturer before finalizing procurement plans.

Supervisors Selection Notes

Select this component when a combined solution for voltage supervision and non-volatile data storage is required in a single package. Ensure the 4.25 V reset threshold aligns with the target microcontroller's operating voltage. Consider the PDIP package style if through-hole mounting is necessary for the application environment.

Supervisors Part Context

This part belongs to the CAT116x series of supervisory circuits originally developed by Catalyst Semiconductor and later acquired by onsemi. These devices are characterized by their integration of EEPROM memory with standard reset controller functions, providing a compact solution for embedded systems that need both power management and persistent data retention capabilities.

Supervisors Replacement Considerations

Direct substitutes include CAT1163LI-30-G or CAT1163WI-30-GT3 for lower voltage thresholds. For higher voltage applications, CAT1163LI-45-G or CAT1163WI-45-GT3 are suitable alternatives. Verify pin compatibility and EEPROM size (16K bits) when selecting replacements.