USB AND AUDIO SWITCHING FOR MOBILE APPLICATIONS Fairchild’s Offering Fairchild’s multimedia switches are ideal for sharing a single USB port or connector with audio, data and video applications. They can also be used for isolation and multiplexing of USB and audio signals. The switches are designed to be compliant with USB2.0 full-speed (FS) and high-speed (HS) standards with bandwidths in excess of 720Mhz. Broadband Processor Audio Codec R HOST L HOST RxD_HOST TxD_HOST DP_HOST DM_HOST Time (x10-9)s Built-in Termination Resistor The built-in termination resistors allow for switching between multiple outputs by terminating unselected ports to ground. This method effectively removes any charge present from parasitic sources before switching to the selected output and thus prevents audio “pop.” Fairchild’s USB Multimedia Switches VBUS DP_CON DM_CON GND Charger Detect Switch Control Negative Swing Audio When used with negative swing capable amplifiers, AC coupling capacitors can be removed, significantly reducing audio “pop” and improving space savings. All Fairchild multimedia switches have negative swing capability. Power-Off Protection Fairchild’s power-off protection ensures power down off-isolation. This feature is advantageous when signals have a voltage present before the switch is powered up, or after the switch is powered down. This feature prevents unwanted current leakage during power down and guarantees off-isolation. Low ICCT For Low Power Consumption Saving our world, 1mW at a time™ Superior High Speed USB and Audio Performance Over-Voltage Tolerance (OVT) Over-voltage tolerance protection is needed to allow the switch to fully meet USB2.0 VBUS short requirements without adding external components. • Fairchild multimedia switches support both high-speed USB (480Mbps) and full-speed USB (12Mbps). • Low CON for USB is critical for achieving USB eye compliance as it limits the amount of edge roll-off and signal distortion. • Low R ON is key to optimal audio performance.

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