CAT1027LI-42-G

Supervisors Overview

The CAT1027LI-42-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It operates within a supply voltage range of 2.7 V to 5.5 V and features a threshold voltage of 4.2 V. The device includes an integrated 2-kbit EEPROM and a watchdog timer. It is housed in an 8-pin PDIP package and supports through-hole mounting. The component functions across an industrial temperature range from -40°C to +85°C with a typical operating current of 3 mA.

Supervisors Feature Summary

• Integrates a 2-kbit CMOS EEPROM for non-volatile data storage alongside supervisory functions
• Includes a built-in watchdog timer to ensure system reliability and fault recovery
• Provides precise voltage supervision with a fixed threshold for CPU power monitoring

Supervisors Applications

• CPU power supply monitoring in embedded systems
• Industrial control units requiring voltage supervision
• Consumer electronics with EEPROM data retention needs

Supervisors Procurement Notes

Verify the specific suffix 'LI' confirms the PDIP-8 through-hole package variant rather than surface-mount options. Confirm RoHS compliance status via the official datasheet as manufacturing processes may evolve. Check for obsolescence notices or lifecycle changes directly from onsemi before finalizing procurement plans.

Supervisors Selection Notes

Select this part when a through-hole PDIP-8 package is required for board layout constraints. Ensure the application demands both voltage supervision and EEPROM storage capabilities. Verify that the 4.2 V threshold aligns with the target system's logic levels and power rail specifications.

Supervisors Part Context

This component belongs to the CAT1027 series of supervisory circuits which combine voltage monitoring with memory functions. Unlike the CAT1026 series which lacks a watchdog, this variant includes timing protection. It differs from the CAT1025 series by offering a watchdog feature instead of manual reset functionality.

Supervisors Replacement Considerations

CAT1027WI-42-G offers identical electrical specifications but utilizes a SOIC-8 surface-mount package instead of the PDIP-8 form factor.