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Connect 2 devices with 9-pin RS-232 serial ports to the USB-A port on your computer, laptop or tablet. Recommended for connecting modems, digital cameras, PDAs and ISDN terminals.

  • Supports data transfer speeds up to 225 Kbps
  • Premium foil and braid shielding reduces EMI/RFI line noise
  • Compatible with Windows®, Mac® and Linux® devices
  • No external power source required
  • Integrated FTDI FT232RL chipset
  • 3-year limited warranty


Connects 2 DB9 Devices to a USB-A Device
  • Recommended for connecting a modem, digital camera, PDA or ISDN terminal to your computer, laptop or tablet
  • Supports data transfer speeds up to 225 Kbps—twice as fast as a built-in serial port
  • No external power source required
  • Portable 6 ft. design fits perfectly into laptop bag
  • COM retention for automatic reassigning of COM values to ports in case of disconnection or reboot
  • Integrated FTDI FT232RL chipset

First-Rate Construction for Superior Signal Transfer
  • Premium foil and braid shielding for EMI/RFI noise protection
  • Molded nickel-plated connectors with gold-plated contacts for optimal signal quality
  • Integral strain relief for long life
  • Flexible PVC jacket easy to install in tight spaces

Broad Compatibility
  • Compatible with Windows, Mac and Linux operating systems

System Requirements

  • Computer or other device with available USB port and Windows XP or later, Mac OS X 10.3 and later, or Linux operating system

Package Includes

  • U209-006-2 2-Port USB to DB9 Serial FTDI Adapter Cable (M/M), 6 ft.
  • Driver CD
  • Owner’s manual
RoHS compliant


UPC Code037332198303
Bus Powered  Yes
Power Consumption (Watts)0.50
Number of Ports2
Side A - Connector 1USB A (MALE)
Side B - Connector 1(2) DB9 (MALE)
Connector PlatingNickel
Material of ConstructionPVC
Cable Jacket ColorBlack
Cable Jacket RatingVW-1
Cable Length (ft.)6
Shipping Dimensions (hwd / in.)2.00 x 4.90 x 5.00
Shipping Weight (lbs.)0.40
Unit Packaging TypeBox
Unit Weight (lbs.)0.13
Operating Temperature Range32° to 104°F (0° to 40°C)
Storage Temperature Range14° to 131°F (-10° to 55°C)
Relative Humidity5% to 90% RH, Non-Condensing
BTUs  1.7 BTU/Hr
USB SpecificationUSB 2.0 (up to 480 Mbps)
Driver RequiredYes
Product ComplianceRoHS; CE (Europe); REACH; WEEE; FCC (USA)
Product Warranty Period (Worldwide)3-year limited warranty

Questions & Answers

COM retention allows the same COM port number to be automatically assigned each time the serial adapter is connected to a USB port on your system (or your system is rebooted). Without COM Retention, you would have to remember which port to connect the adapter.
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