FM809RS3X

Supervisors Overview

The FM809RS3X is a single-channel power supply supervisor circuit manufactured by Fairchild Semiconductor. It operates within a voltage range and features an activation threshold of 2.63V. The device provides a reset function with an active low signal output format, utilizing a push-pull totem pole configuration. It includes a minimum reset timeout of 140ms to ensure stable system recovery. Packaged in a SOT-23-3 case, it supports RoHS3 compliance for environmental standards.

Supervisors Feature Summary

• Provides active low reset signal for monitored power rails
• Utilizes push-pull totem pole output structure
• Ensures system stability via defined reset timeout duration

Supervisors Applications

• Portable electronic devices requiring power monitoring
• Battery-operated equipment needing supervision
• General purpose power supply support circuits

Supervisors Procurement Notes

Verify the manufacturer origin, as Rochester Electronics also lists this part number. Confirm RoHS3 status and package type SOT-23-3 match requirements. Ensure the specific threshold voltage of 2.63V aligns with design needs. Check for any ordering suffix variations that may affect electrical characteristics or packaging.

Supervisors Selection Notes

Select this component when a single-channel supervisor with active low output is required. The 2.63V threshold suits applications monitoring lower voltage rails. Consider the 140ms minimum timeout for systems needing extended reset delays. The SOT-23-3 package offers space efficiency for compact designs.

Supervisors Part Context

This component belongs to the family of 3-pin UC Supervisor Circuits. It serves as a power management IC (PMIC) specifically designed for monitoring voltage levels. Similar parts include other variants from Fairchild and Rochester Electronics offering comparable supervision functions in small packages.

Supervisors Replacement Considerations

Cross-reference with other Fairchild supervisor ICs in the SOT-23-3 package. Verify if alternative manufacturers offer compatible threshold voltages and reset timing specifications.