CAT1161LI-30

Supervisors Overview

The CAT1161LI-30 is a supervisory circuit manufactured by onsemi, integrating a 16K I2C serial CMOS EEPROM with hardware write protection, a precision reset controller, and a watchdog timer. It operates within a supply voltage range of 2.7 V to 6 V, featuring a threshold voltage of 3 V. The device provides a manual reset input and an open-drain output type. It includes a 270 ms reset delay time and consumes 3 mA of operating current. The component supports active high, active low, and open drain configurations. It is housed in an 8-pin PDIP package and functions across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates 16K I2C serial EEPROM with hardware memory write protection
• Includes precision reset controller with brown-out protection
• Features watchdog timer that monitors the SDA line for system glitch recovery

Supervisors Applications

• Microcontroller-based systems requiring integrated memory and supervision
• Embedded applications needing hardware-enforced data protection
• Systems requiring automatic recovery from software or hardware hangs

Supervisors Procurement Notes

Verify component authenticity through authorized distributors as the part may be discontinued. Confirm package integrity and RoHS compliance status prior to integration. Cross-reference datasheet revisions to ensure parameter alignment with current design requirements. Validate pinout compatibility if substituting into existing PCB layouts.

Supervisors Selection Notes

Select this component when a combined solution for non-volatile storage and power supervision is required. Ensure the I2C interface matches the microcontroller capabilities. Verify that the 3 V threshold aligns with the system's minimum operating voltage. Consider the PDIP package constraints for board space and thermal management needs.

Supervisors Part Context

The CAT1161 series combines memory and supervisory functions to simplify microcontroller designs. It replaces discrete components by integrating EEPROM, reset logic, and watchdog timers into a single CMOS chip. This consolidation reduces board space and assembly complexity while enhancing system reliability through hardware-level protection mechanisms.

Supervisors Replacement Considerations

Check for direct substitutes within the CAT1161 family or compatible PMIC solutions. Verify pin-to-pin compatibility and electrical parameter equivalence before substitution.