CAT1021LI-42-G

Supervisors Overview

The CAT1021LI-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 a manual reset function and a watchdog timer. It is housed in an 8-pin PDIP package with through-hole mounting style. The component supports a single monitored input and has a maximum power dissipation of 1 W. Operating temperatures range from -40°C to +85°C.

Supervisors Feature Summary

• Integrates a watchdog timer for system reliability monitoring
• Provides manual reset capability for user-initiated control
• Supports single-input voltage supervision
• Compatible with through-hole PCB mounting

Supervisors Applications

• CPU monitoring circuits
• Voltage supervisory systems
• Power management IC applications

Supervisors Procurement Notes

Verify current availability status as the component may be discontinued or subject to specific ordering requirements. Confirm RoHS compliance details and check for any product change notices (PCN) related to manufacturing or packaging updates before finalizing procurement plans.

Supervisors Selection Notes

Select this part when a through-hole supervisory circuit with integrated watchdog and manual reset is required. Ensure the application voltage stays within the 2.7 V to 5.5 V range and that the 4.2 V threshold aligns with system design needs. Consider package constraints and thermal dissipation limits of 1 W.

Supervisors Part Context

This component belongs to the CAT1021 series of supervisory circuits from onsemi. It is categorized under PMIC - Power Management ICs. Similar parts in the family include variants with different packages or thresholds, such as the CAT1021ZI-42-G in MSOP-8 or other threshold options like 3.0 V or 4.5 V.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative supervisory circuits based on threshold voltage, package type, and functional features like watchdog and manual reset.