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USB transceiver offers auto detection, audio fidelity

Posted: 27 May 2010 ?? ?Print Version ?Bookmark and Share

Keywords:USB? transceiver? interface? MOSFET?

The USB port has evolved from a pure data portal to a means for file transfers, battery-charging, music listening and factory programming, becoming the universal interface for mobile applications. To better support the industry's convergence into one connector, Fairchild Semiconductor is offering new USB transceiver and USB accessory detection switch that bring functional enhancements without adding design complexity or increasing space and power in mobile designs.

Fairchild's micro-USB switch (FSA9280A) and USB transceiver (FUSB2500) bring significant design advantages to the mobile space. The FSA9280A automatically detects accessories and configures the proper path for each accessory. This device can detect every accessory and charger in the market, and has a number of "reserved" resistors to accommodate new accessories such as glucometers, e-frames and audio docks. The FUSB2500 has an integrated charger detect that allows detection without additional component count.

The FSA9280A uses advanced sampling methods to minimize power consumption in the standby state, extending battery life. It also provides a negative switch capability in audio applications without consuming power; alternative solutions need a charge pump for this. Both the FSA9280A and FUSB2500 offer a low power down function that puts the device in standby when functions are not in use.

Leveraging Fairchild's signal and audio expertise, the FSA9280A features exceptionally low Total Harmonic Distortion of 0.1 percent to optimize performance. The FSA9280A also features built-in protection functions and the FUSB2500 offers exceptionally high ESD protection, 15kV HBM, exceeding the 2kV standard. By integrating a MOSFET and USB IP into one IC, the FSA9280A eliminates at least five additional components and reduces BOM costs.

All of these design attributes are instrumental in delivering a rich user experience. The FSA9280A allows for every conceivable form of accessory and five future definable accessories, ushering in a full multi-media experience. The FSA9280A packs data, charging, audio, headset and other accessory connectivity into one solution. Through its careful optimization of power, both of these products feature a power saving mode to help extend battery life for digital still cameras, portable medical and mobile applications. Through its audio expertise, Fairchild maintains signal integrity while adding new functionality. And by integrating and packing performance into small packages, Fairchild offers the smallest designs possible.

The FUSB2500UCX and FSA9280AUMX are priced at $1 each in 1,000 quantities.

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