CAT1027LI-30-G

Supervisors Overview

The CAT1027LI-30-G is a voltage supervisory circuit manufactured by onsemi, designed for monitoring single-input power supply voltages. It operates within a supply voltage range of 2.7 V to 5.5 V and features a fixed threshold voltage of 3 V. The device integrates a watchdog timer function to ensure system reliability against software or hardware glitches. It is housed in an 8-pin PDIP package and supports manual reset functionality. The component is rated for industrial temperature operation from -40°C to +85°C.

Supervisors Feature Summary

• Integrates a watchdog timer circuit with an interrupt input to reset the system if software hangs occur
• Provides manual reset capability allowing external control over the reset signal state
• Includes hardware data protection via a V sense circuit that prevents EEPROM writes during low voltage conditions

Supervisors Applications

• CPU supervision in embedded systems requiring memory protection
• Industrial control systems operating within extended temperature ranges
• Power supply monitoring for microcontrollers and ASICs

Supervisors Procurement Notes

Verify the obsolete status and end-of-life notifications prior to procurement. Confirm availability through authorized distributors as stock may be limited. Ensure the PDIP-8 package variant matches the design requirements. Check for any product change notices affecting pinout or electrical characteristics. Validate compliance with RoHS standards for the specific manufacturing batch.

Supervisors Selection Notes

Select this component when a single-channel supervisor with integrated watchdog and manual reset is required. The 3 V threshold suits 3 V logic systems. The PDIP package is suitable for through-hole prototyping or high-reliability applications. Consider the CAT1027SI-30-TE13 for surface mount alternatives. Verify that the 2.7 V minimum operating voltage aligns with the system's brown-out requirements.

Supervisors Part Context

This part belongs to the CAT1027 series of dual voltage supervisory circuits with I2C serial EEPROM. While the CAT1027 typically offers two channels, this specific LI-30-G variant is documented as a single-input supervisor in some listings. The series combines power management with non-volatile memory storage. It is part of onsemi's portfolio of PMIC solutions for industrial and consumer electronics.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The CAT1027SI-30-TE13 is a similar SOIC-8 variant but lacks explicit substitution confirmation. No other direct replacements are listed.