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Multimedia and USB2.0 Hi-Speed and Audio Switch with Negative Signal Capability and Built-in Termination on Unselected Audio Paths
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General 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.
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Features
| Audio: 1.8W Typical On Resistance
HS-USB: 5W Typical On Resistance
HS-USB: 5pF Typical On Capacitance
Audio: 1W Typical On Resistance
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
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Applications
| MP3, Cell Phone, PDA, Digital Camera, and Notebook
LCD Monitor, TV, and Set-Top Box | | |
