CAT1021LI45

Supervisors Overview

The CAT1021LI45 is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It features a single monitored input with a threshold voltage of 4.5 V and an overvoltage threshold of 4.75 V. The device operates within a supply voltage range of 2.7 V to 5.5 V and consumes 3 mA of working power current. It includes manual reset functionality and supports an industrial temperature range from -40°C to +85°C. The component is housed in an 8-PDIP package and dissipates up to 1 W of power.

Supervisors Feature Summary

• Integrates voltage supervision with manual reset capability for reliable system monitoring
• Includes built-in watchdog timer functionality to prevent processor lockups
• Supports open collector/drain output configuration for flexible interfacing

Supervisors Applications

• CPU monitoring in embedded systems
• Industrial control units requiring voltage supervision
• Electronic devices operating within industrial temperature ranges

Supervisors Procurement Notes

Verify the specific package variant and manufacturing origin before procurement, as DIP configurations may vary by production batch. Confirm compliance with RoHS directives and check for any recent product change notices regarding packaging or material composition. Ensure the supplier provides valid traceability documentation for industrial-grade components.

Supervisors Selection Notes

Select this component when a single-channel supervisor with integrated watchdog and manual reset is required. The 4.5 V threshold suits standard 5 V logic systems. Consider the 8-PDIP package for through-hole mounting requirements. Verify that the 3 mA quiescent current aligns with system power budget constraints.

Supervisors Part Context

This part belongs to the CAT1021 series of supervisory circuits from onsemi. These devices combine voltage monitoring with non-volatile memory capabilities in some variants, though this specific model focuses on supervision and reset functions. The series targets cost-sensitive applications needing robust power management.

Supervisors Replacement Considerations

Cross-reference with CAT1021ZI-45-G for surface-mount alternatives. Verify pin compatibility and electrical specifications before substituting. Note that package differences may require PCB layout adjustments.