FM809TS3

Supervisors Overview

The FM809TS3 is a single-channel voltage supervisor circuit manufactured by Fairchild Semiconductor. It monitors one power supply line with an activation threshold of 3.08V. The device features a push-pull, totem pole signal output format and provides an active low reset function. Designed as a replacement for discrete devices and external resistor bias networks, it integrates supervision capabilities into a compact form factor suitable for space-constrained electronic designs.

Supervisors Feature Summary

• Integrates voltage monitoring and reset generation to replace single devices and external resistor bias networks
• Provides active low reset signal via push-pull totem pole output interface
• Monitors a single supervised voltage line with fixed activation threshold

Supervisors Applications

• Power supply monitoring in embedded systems
• Voltage supervision for microcontroller reset sequences
• Protection circuits requiring active low reset signals

Supervisors Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor assets were acquired by ON Semiconductor. Confirm that the specific part number FM809TS3 corresponds to the intended vintage or current production batch. Ensure compatibility with system voltage levels and reset timing requirements before procurement.

Supervisors Selection Notes

Select this component when a single-channel supervisor with a 3.08V threshold is required. The push-pull output allows direct interfacing with digital logic without additional pull-up resistors. Consider the active low reset polarity and totem pole drive capability for downstream circuit compatibility.

Supervisors Part Context

Fairchild Semiconductor was a prominent American semiconductor company founded in 1957. Its product portfolio included power management and discrete components. The company's operations and intellectual property were subsequently acquired by ON Semiconductor, affecting the lineage and support status of legacy part numbers like the FM809 series.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference availability through official distributor channels if obsolescence is a concern.