FSA9280A − USB 2.0 Accessory Detection Switch w/ 28V FET


The FSA9280A is a high-performance multimedia switch featuring automatic switching and accessory detection for the USB port. This switch allows the sharing of a common USB port to pass audio, USB data / charging, as well as factory programmability. In addition, the FSA9280A integrates detection of accessories, such as headphones, headsets (MIC / button), car chargers, USB chargers, and UART data cables with the ability to use a common USB connector. The FSA9280A can be programmed for manual switching or automatic switching of data paths based on accessory detected. FSA9280A includes an integrated 28V over-voltage and 1.5A over-current protected FET. For the complete datasheet, samples, questions, or board requests; please contact analogswitch@fairchildsemi.com.

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Product Status/Pricing/Packaging

Product Product & Eco Status *Pricing Packaging & Packing Info **Package Marking Convention Qualification Support Compliance Certificates
0 FSA9280AUMX Full Production
Green as of Nov 2009
$0.9856  Details
0.55 x 3 x 4mm

Line 1:$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code) &K
Line 2:9280A
Moisture Sensitivity Level (MSL) :  1  
Max Reflow Temp :  260  


■ Signals: Audio, USB, UART, USB Charging
■ Switch Mechanism: Automatic Switching with Available Interrupt
■ Accessory Detection:
  • Headsets
  • (Headphone/MIC/Remote)
  • USB Data Port
  • UART Serial Link
  • USB Chargers (Car-Kit, CDP, DCP)
  • Factory-Mode
  • TTY Converter
■ USB: FS and HS 2.0 Compliant
■ USB Charging:
  • Battery Charging 1.1 Compliant
  • Integrated Power FET
  • Over-Voltage Protection (OVP) 28V
  • Over-Current Protection (OCP) 1.5A
  • 6.8V OVP
■ Audio: Left, Right, MIC, TTY
■ VBAT: 3 to 4.4V
■ Programmability: I2C
■ ESD: 15kV IEC 61000-4-2 Air Gap
■ Package: 20-Lead UMLP (3 x 4 x 0.55mm, 0.5mm Pitch)


  • Media Tablets
  • Storage & Peripherals
  • Mobile Handsets
  • Wireless LAN Card & Broadband Access
  • PMP/MP3 Players

Application Notes


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