CAT1161LI-42-G

Supervisors Overview

The CAT1161LI-42-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a precision reset controller with a watchdog timer and features an I2C serial CMOS EEPROM with 16K capacity. The device operates within a supply voltage range of 2.7 V to 6 V, utilizing a 4.5 V under-voltage threshold and a 4.75 V over-voltage threshold. It provides active high, active low, and open drain output options with a manual reset capability. The reset delay time is specified at 270 ms. Packaged in an 8-pin PDIP through-hole format, it supports an operating temperature range from -40°C to +85°C and consumes 3 mA of working power current.

Supervisors Feature Summary

• Integrates a precision reset controller with a watchdog timer for system reliability.
• Includes 16K I2C serial CMOS EEPROM for data storage.
• Offers flexible output configurations including active high, active low, and open drain.
• Supports manual reset functionality for user intervention.

Supervisors Applications

• CPU supervision in embedded systems
• Power supply monitoring circuits
• Industrial control system reset management

Supervisors Procurement Notes

Verify component authenticity and datasheet alignment due to discontinued status. Confirm package integrity and RoHS compliance documentation. Check for obsolescence notices or lifecycle updates from onsemi. Ensure replacement strategies are documented if sourcing new units is not feasible. Validate electrical parameters against original design specifications before integration.

Supervisors Selection Notes

Select this component when a combined reset controller, watchdog, and non-volatile memory solution is required in a through-hole package. Consider the 4.5 V threshold suitability for specific supply rails. Evaluate the 270 ms reset delay against system startup timing requirements. Assess the need for I2C interface compatibility with existing microcontrollers.

Supervisors Part Context

This part belongs to the CAT1161 series of supervisory circuits from onsemi, formerly Catalyst Semiconductor. The series typically combines voltage monitoring with EEPROM storage. The LI suffix indicates a plastic DIP package variant. This specific model represents a legacy product line often used in established industrial and consumer electronics designs requiring robust power management.

Supervisors Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.