Low Power, Three Port, Hi-Speed Differential Switch

The FSA642 is a bi-directional, low-power, high-speed analog switch. The pin out is designed to ease differential signal layout and is configured as a triple-pole, double-throw switch (TPDT). The FSA642 is optimized for switching between two MIPI devices, such as cameras or LCD displays and on-board Multimedia Application Processors (MAP).

The FSA642 is compatible with the requirements of Mobile Industry Processor Interface (MIPI). The low-capacitance design allows the FSA642 to switch signals that exceed 500MHz in frequency. Superior channel-to-channel crosstalk immunity minimizes interference and allows the transmission of high-speed differential signals and single-ended signals, as described by the MIPI specification.


  • Low On Capacitance: 7.0pF Typical
  • Low On Resistance: 7.0W Typical
  • Wide -3db Bandwidth: > 720MHz
  • 24-Lead UMLP (2.5 x 3.4mm) Package
  • 8kV ESD Rating; >16kV Power/GND ESD Rating
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Product Product &
Eco Status
Unit Price/
1K Order
Packing Method Convention Package Marking
FSA642UMX Full Production
Green as of Aug 2008

UMLP 2.5x3.4 24L  -  Details
0.55 x 2 x 3.4mm,  TAPE REEL

PDF UMLP 2.5x3.4 24L  Drawing
Last Update: Nov 2015 PDF UMLP24L 2.5x3.4, Packing Drawing
Last Update: Oct 2015
Line 1JG&K

Line 2&2 (2-Digit Date Code)
&Z (Plant Code)

FIT 0.9 @55°C
change temp

ESD (HBM) 6500V

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 FSA642

  • Media Tablets
  • Mobile Handsets
  • PMP/MP3 Players
  • Storage & Peripherals
  • Wireless LAN Card & Broadband Access
Application Note Description
AN-6095 PDFD-PHY MIPI Switches in Multi-Camera / Multi-Display Applications
Last Update : 28-Jun-2014
AN-8037 PDFFSA642 - Evaluation Board User Guide
Last Update : 03-Mar-2011
Package Condition Temperature Range Vcc Range Software Version Revision Date
UMLP 2.5x3.4 24L Typical;Thermal;Slow;Fast;Electrical -40°C to 85°C 2.65VV to 4.3VV 4.2 10-Feb-2014

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