FSA66M5X

Analog Switches, Multiplexers, Demultiplexers Overview

The FSA66M5X is a single-channel, normally open SPST analog switch IC manufactured by onsemi (formerly Fairchild Semiconductor). It operates within a supply voltage range of 1.65 V to 5.5 V and features a maximum on-resistance of 7 Ohms. The device supports high-speed signal switching with a maximum turn-on time of 4.5 ns and a maximum turn-off time of 5 ns. It is housed in a compact SOT-23-5 surface-mount package and is designed for low-power applications, drawing a maximum supply current of 10 uA. The component functions reliably across an extended industrial temperature range from -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Single-channel SPST configuration for efficient signal routing
• Low on-resistance ensures minimal signal attenuation
• High-speed switching capability for data integrity
• Ultra-low power consumption suitable for battery-operated devices

Analog Switches, Multiplexers, Demultiplexers Applications

• Portable consumer electronics signal path management
• Audio and video signal switching circuits
• Data acquisition systems requiring low distortion
• Battery-powered mobile devices

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the manufacturer designation carefully, as onsemi acquired Fairchild Semiconductor's operations. Confirm the specific suffix 'X' corresponds to the intended tape-and-reel packaging variant rather than cut-tape or other distribution formats. Ensure compliance with current RoHS directives and check for any lifecycle status changes such as obsolescence notices before finalizing procurement plans.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a single-pole single-throw switch is required with low on-resistance and fast switching speeds. It is appropriate for designs operating between 1.65 V and 5.5 V where space is constrained due to the small SOT-23-5 footprint. Consider thermal dissipation limits if driving higher currents, as the power dissipation rating is specified at 200 mW.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the FSA series of analog switches, which are widely used in portable electronics. The 'FSA66M5X' designation specifically identifies the single-channel variant with the 'X' suffix typically indicating reel packaging. It serves as a direct successor to legacy Fairchild Semiconductor parts, maintaining pin compatibility and electrical characteristics while adhering to modern manufacturing standards.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Direct substitutes include the FSA66M5NL and FSA66M5. Verify that alternative packages or suffixes match the required PCB layout and reflow soldering profiles.