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Description: The ever popular FTDI USB to UART IC now comes with built-in EEPROM and built-in oscillator! This IC comes in a 28-pin SSOP package and can be soldered by hand. The FT232R is the latest IC from FTDI requiring very few external components for operation!

Breakout board now available below.


  • Implements full v2.0 USB protocol
  • Needs no external crystal
  • Requires only decoupling caps
  • Internal EEPROM for device ID and Product Description strings
  • Royalty-Free Driver support for Windows, Linux, and Mac OSX


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Customer Comments

  • These are $4.50 on Mouser>> Mad props to Sparkfun!
    The drivers are for your computer, so when you hook the chip up to your usb the computer recognizes it and converts it to a COM.

  • Has anyone used these effectively? I am currently using the FT311 Android Host chip and am experiencing some strange problems with the UART to USB transfer. I have found very little documentation on what exactly makes it through the uart to usb conversion. I have reached out to FTDI but no response yet. When sending a character from PIC32 to Android a byte makes it through every once in awhile and when it does it is usually surrounded by alot of null characters. On the other side, I have a PIC sending the data RX by the PIC to another TX to a computer terminal to view the data. On this end I get streaming amounts of characters that make no sense. Anybody else experienced this?

    • Also, on the ft232 and the like, you are able to configure certain settings with the D2XX drivers and windows. How does this work with a usb host chip such as the FT311H and FT312D? \

  • can i run this chip off 3.3v

  • good price sparkfun!!! Cheaper than they are on Newark!

    Do you know what date code you guys are currently shipping?

  • Is it possible to use this as a USB host for mass storage devices?

  • It should be pointed out that this device is for SERIAL (RX/TX) transfers. The 245 chip does parallel transfers.

  • What steps would I need to take to replace this chip on an arduino? Would I have to update the EEPROM or just solder it in and go?

  • Note this board also works with BOB-00500 if you wish to incorporate into your project and populate your own capacitors, USB socket, etc by other means.

  • Any one have some code for this? is it needed?

  • silly question. same thing, just an s

  • could you hook this up to an atmega even though that’s usart and this is uart?

  • I’d like to ask if this chip is recognized from the PC side as a Human Interface Device. I use mikroC PRO for programming uC and i’ve seen that it includes an HID terminal.
    Could I use this terminal to send bytes through this bridge via USB to a uC that only supports UART, without installing those drivers in Windows?
    Please, if anybody knows, answer as quick as possible because I might need a few of these for my next project.
    Thank you!

  • could someone elaborate on how you use the drivers in a microcontroller, do you add it as a header file? or do you have to load them into the chip?
    how do the drivers actually work as an interface?
    and once working will it just show up like a normal serial com port where i can hook it into hyperterminal and recieve/transmit my UART transmissions as normal?

    • The drivers are installed on your computer. No special code needed on the uC end. It should show up as a com port.

  • The feature list says that a pull-up resistor is required, but your breakout boards don’t include one. What gives?

    • I could be mistaken, but it looks to me that they just haven’t updated the feature list. Per the datasheet:
      “Integrated USB Resistors - Previous generations of FTDI?s USB UART devices required two external series resistors on the USBDP and USBDM lines, and a 1.5 k? pull up resistor on USBDP. These three resistors have now been integrated onto the device."

    • Good catch. Description updated.

Customer Reviews

4.5 out of 5

Based on 2 ratings:

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Best non-counterfeit chip ever

Before you buy this, have a read through SparkFun’s FTDI Drivers and Counterfeit Chips blog post, and take comfort in the fact that SparkFun buys their chips from reputable sources.

Great, that’s out of the way.


  • Lots of options for powering your device: 3.3V, 5V and self-powered devices are supported
  • Works out-of-the-box without reconfiguring the EEPROM
  • Only needs a few external components


  • FTDI’s EEPROM utility only runs under Windows

loved the first two i bought i had to buy 3 more.

Very small, reliable and can switch from 3.3 to 5 vdc, powers my devices like a champ, highly recommended