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.


    ■ 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)
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Product Product &
Eco Status
Unit Price/
1K Order
Packing Method Convention Package Marking
FSA9280AUMX Full Production
Green as of Nov 2009

UMLP 3x4 20L  -  Details
0.55 x 3 x 4mm,  TAPE REEL

PDF UMLP 3x4 20L  Drawing
Last Update: May 2014 PDF UMLP20L 3x4, Packing Drawing
Last Update: Oct 2015
Line 1$Y (Fairchild logo)
&Z (Plant Code)
&2 (2-Digit Date Code)

Line 29280A

FIT 5.7 @55°C
change temp

ESD (HBM) 3500V

Moisture Sensitivity Level (MSL) 1

Max Reflow Temp 260


If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
* Click here for further top mark packaging information for FSA9280A

  • Media Tablets
  • Mobile Handsets
  • PMP/MP3 Players
  • Storage & Peripherals
  • Wireless LAN Card & Broadband Access
Application Note Description
AN-9073 PDFHigh-Speed USB Switch Layout Considerations
Last Update : 03-Mar-2011

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