CAT1027LI-25-G

Supervisors Overview

The CAT1027LI-25-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It integrates a precision power supply monitor with a watchdog timer and features an MSOP-8 surface-mount package. The device operates within a supply voltage range of 2.7 V to 5.5 V, utilizing a threshold voltage of 2.5 V. Key electrical parameters include a maximum operating temperature of +85°C and a minimum of -40°C. The unit draws a typical operating current of 3 mA and supports a power dissipation of 1 W. It lacks manual reset functionality and monitors a single input channel.

Supervisors Feature Summary

• Integrates a precision voltage supervisor with a built-in watchdog timer for system reliability.
• Provides automatic reset generation upon detection of under-voltage or over-voltage conditions.
• Utilizes low-power CMOS technology to minimize energy consumption during operation.

Supervisors Applications

• CPU power supply monitoring in embedded systems
• Watchdog timer implementation for microcontroller stability
• Voltage supervision for industrial control circuits

Supervisors Procurement Notes

Verify the specific suffix 'G' indicates RoHS compliance status as per manufacturer documentation. Confirm the MSOP-8 package variant matches design requirements. Check current availability status through authorized distributors, as lead times may vary. Ensure the 2.5 V threshold aligns with target system voltage levels. Validate that the absence of manual reset meets functional specifications.

Supervisors Selection Notes

Select this component when a combined voltage supervisor and watchdog function is required in a compact surface-mount form factor. The 2.5 V threshold suits 3.3 V logic systems requiring precise monitoring. Consider the MSOP-8 package for space-constrained PCB layouts. Verify that the -40°C to +85°C industrial temperature range covers operational environments. Ensure no manual reset input is needed for the application design.

Supervisors Part Context

This part belongs to the CAT1027 series of supervisory circuits from onsemi. The series typically combines EEPROM memory with voltage monitoring, though this specific variant focuses on supervision and watchdog functions. It shares architectural similarities with other CAT102x parts but differs in package type and feature integration. The LI suffix generally denotes a specific package and temperature grade configuration within the product line.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Cross-reference with other CAT1027 variants such as CAT1027ZI-25-G or CAT1027WI-25-T3 only if package differences (MSOP vs SOIC) are acceptable. Verify pinout compatibility before substitution. No direct equivalent replacements are documented in the reference material.