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| FSA321 -- USB2.0 Hi-Speed and Audio Switches with Negative Signal Capability September 2009 FSA321 -- USB2.0 Hi-Speed (480Mbps) and Audio Switches with Negative Signal Capability and Built-in Termination on Unselected Audio Paths Features Audio: 1.8 Typical On Resistance HS-USB: 8 Typical On Resistance HS-USB: 5pF Typical On Capacitance USB Path -3db Bandwidth: > 720MHz Negative Swing Capable Audio Channel Power-off Protection on Common D+/R, D-/L Ports Automatic USB Detection (Configurable) Power-Off Protection on all I/O Ports OVT on all I/O Ports Flow-Through Pin Out Eliminates PCB Vias Built-In Termination on Unselected Audio Paths to Inhibit Audio Pop Description The FSA321 is a Double-Pole, Double Throw (DPDT) multiplexer that combines a low-distortion audio and a USB2.0 High-Speed (HS) switch path. This configuration enables audio and USB data to share a common connector port. The architecture is designed to allow audio signals to swing below ground. This means a common USB and headphone jack can be used for personal media players and portable peripheral devices. Since USB2.0 is an industry standard for shared datapath in portable devices, FSA321 can be configured for automatic VBUS detection. The FSA321 includes a power-off feature as well as over-voltage tolerance to minimize current consumption when VSW exceeds VCC. Typical applications involve switching in portables and consumer applications, such as cell phones, digital cameras, and notebooks with hubs or controllers. Applications MP3, Cell Phone, PDA, Digital Camera, and Notebook LCD Monitor, TV, and Set-Top Box IMPORTANT NOTE: For additional performance information, please contact analogswitch@fairchildsemi.com. Ordering Information Part Number FSA321UMX Package Number Top Mark MLP010A GL Eco Status Green Package Description 10-Lead Quad, Ultrathin MLP, 1.4 x 1.8mm For Fairchild's definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. VCC A/LP Sel Rpd Control Block Rpd USB Sel D+ D+/R R RT DL D-/L RT Figure 1. FSA321 Analog Symbol (c) 2007 Fairchild Semiconductor Corporation FSA321 * Rev 1.0.4 www.fairchildsemi.com FSA321 -- USB2.0 Hi-Speed and Audio Switches with Negative Signal Capability (c) 2007 Fairchild Semiconductor Corporation FSA321 * Rev.1.0.4 www.fairchildsemi.com 12 |
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