FM809SS3X

Supervisors Overview

The FM809SS3X is a fixed 1-channel power supply support circuit manufactured by Fairchild Semiconductor. It utilizes CMOS technology and operates within a supply voltage range of 1.1 V to 5.5 V. The device features an activation threshold voltage of 2.93 V and provides an active low reset function. The signal output format is push-pull, totem pole. It is available in TO-236-3, SC-59, and SOT-23-3 packages. The component is rated for an operating temperature range of -40°C to +105°C.

Supervisors Feature Summary

• CMOS technology implementation for power supply monitoring
• Active low reset function with push-pull output
• Fixed activation threshold voltage specification

Supervisors Applications

• Power supply supervision in electronic systems
• Microprocessor reset circuitry
• Battery-powered device monitoring

Supervisors Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor assets are managed by ON Semiconductor. Confirm the specific package variant (TO-236-3, SC-59, or SOT-23-3) required for your design. Ensure the activation threshold matches the 2.93 V specification. Check for obsolescence status given the acquisition history. Validate that the operating temperature range meets your environmental requirements.

Supervisors Selection Notes

Select this component when a fixed 2.93 V threshold is required for power supply monitoring. The CMOS technology ensures low power consumption suitable for battery applications. The active low reset output is compatible with standard logic inputs. Consider the operating temperature range of -40°C to +105°C for industrial or automotive environments. Verify pin compatibility if replacing existing designs.

Supervisors Part Context

The FM809 series consists of 3-pin UC supervisor circuits designed for power supply monitoring. The FM809SS3X is a specific variant within this family, offering a fixed threshold voltage. Other variants in the series may offer different thresholds or reset timings. The series is widely used in consumer electronics and industrial equipment requiring reliable power supervision.

Supervisors Replacement Considerations

Direct substitutes include other FM809 series variants such as FM809JS3X or FM809LP3X, which share similar packaging and functionality but may differ in threshold voltage. Cross-manufacturer equivalents should be verified for pinout and electrical parameter compatibility.