CAT1641LI-30-G

Supervisors Overview

The CAT1641LI-30-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU monitoring applications. It operates within a supply voltage range of 3 V to 5.5 V and features a fixed under-voltage threshold of 3 V with an over-voltage threshold of 3.15 V. The device provides a manual reset function with a reset delay time of 270 ms. It utilizes an open-drain output type that is active low. The component is housed in a PDIP-8 through-hole package and supports a single monitored input. It consumes 3 mA of operating power current and has a maximum power dissipation of 1 W. The operational temperature range extends from -40 °C to +85 °C.

Supervisors Feature Summary

• Provides manual reset functionality for system supervision
• Features active low open-drain output configuration
• Supports through-hole mounting via PDIP-8 package

Supervisors Applications

• CPU voltage monitoring systems
• General voltage supervisory circuits
• Power management IC applications

Supervisors Procurement Notes

Verify the specific suffix 'LI' against official datasheets to confirm the through-hole PDIP-8 package variant, as other suffixes may indicate surface-mount options. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as regulatory documentation requires explicit verification. Ensure the active low output polarity matches the design requirements, distinguishing it from active high variants. Check for any obsolescence notices or lifecycle changes, as availability may be restricted compared to newer revisions.

Supervisors Selection Notes

Select this component when a through-hole solution is required for voltage supervision with a fixed 3 V threshold. The active low output necessitates compatibility with downstream logic inputs expecting a low signal upon reset. Verify that the 270 ms reset delay aligns with system startup timing requirements. Consider the 3 mA quiescent current if power efficiency is critical, and ensure the 5.5 V maximum rating accommodates potential supply transients without damage.

Supervisors Part Context

This part belongs to the CAT1641/CAT1640 series of supervisory circuits from onsemi. While the CAT1641 series typically includes surface-mount SOIC-8 variants, the LI suffix specifically denotes the through-hole PDIP-8 package version. This family focuses on basic voltage monitoring with manual reset capabilities, serving as a fundamental building block for power integrity in embedded systems.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.