FSA550UCX

Analog Switches - Special Purpose Overview

The FSA550UCX is a single-channel, 4PST depletion mode isolation switch manufactured by onsemi. It operates within a supply voltage range of 1.6 V to 3 V and draws a maximum supply current of 70 uA. The device features a maximum on-resistance of 800 mOhms and supports a DC switch current of 350 mA. Switching performance includes a maximum turn-on time of 120 ns and a maximum turn-off time of 160 us. It is housed in a WLCSP-12 package suitable for surface mount installation and functions reliably across an operating temperature range of -40 C to +85 C.

Analog Switches - Special Purpose Feature Summary

• Depletion mode architecture provides inherent isolation switching capabilities without requiring external biasing for the off state.

Analog Switches - Special Purpose Applications

• Isolation switching in portable electronic devices
• Signal path management in mobile communication hardware

Analog Switches - Special Purpose Procurement Notes

Verify component authenticity through authorized distribution channels due to end-of-life status. Confirm RoHS compliance documentation matches specific manufacturing lots. Validate package integrity upon receipt as WLCSP components are sensitive to mechanical stress during handling and storage.

Analog Switches - Special Purpose Selection Notes

Select this component when low supply voltage operation between 1.6 V and 3 V is required. Ensure the 800 mOhm on-resistance meets signal integrity requirements for the target application. Verify that the WLCSP-12 footprint aligns with existing PCB layout constraints and thermal design specifications.

Analog Switches - Special Purpose Part Context

This part belongs to the FSA550 series of analog switches from onsemi. It is designed for compact consumer electronics where space efficiency and low power consumption are critical. The depletion mode technology distinguishes it from standard enhancement mode CMOS switches.

Analog Switches - Special Purpose Replacement Considerations

Check for direct pin-compatible alternatives within the same manufacturer portfolio. Evaluate other 4PST switches with similar voltage ranges if sourcing becomes difficult due to obsolescence.