FSA805 USB2.0 High-Speed (480Mbps), UART, and Audio Switch with Negative Signal Capability July 2013 FSA805 USB2.0 High-Speed (480Mbps), UART, and Audio Switch with Negative Signal Capability Features Description The FSA805 is a 3:1 USB accessory switch that enables 3:1 Switch Handles: USB data, stereo/mono audio, and UART data to share Audio Headsets a common connector port. It is designed for high-speed USB 2.0 signaling. The architecture is designed to allow UART audio signals to swing below ground (to -0.8V) so a Up to 2 High-Full and Low-Speed USB Data common USB and headphone jack can be used for personal media players and portable peripheral devices. Negative-Swing-Capable Audio Channel The FSA805 meets both USB Rev. 2.0 and micro-USB Built-in Termination Resistors for Audio Pop specifications. Reduction Simple Switch Control Using Two Select Pins Applications Cell Phones, MP3 Players, PDAs Ordering Information Operating Part Number Top Mark Package Eco Status Temperature Range FSA805UMX -40 to +85C JZ Green 12-Lead Quad, UMLP, 1.8x1.8mm For Fairchilds definition of Eco Status, please visit: FSA805 USB2.0 High-Speed (480Mbps), UART, and Audio Switch with Negative Signal Capability Application Diagram Baseband VCC FSA805 Processor Micro L HOST Audio R HOST USB Codec R 3:1 V BUS TxD HOST MUX UART or RxD HOST and DM CON HS USB Charge Pump DP CON DM HOST ID UART or DP HOST GND HS USB SEL 0 Switch SEL 1 Control Figure 2. Typical Application 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSA805 Rev. 1.0.0 2