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Description: Introducing the 3.3V SparkFun FT231X Breakout board, complete with the full UART hardware handshake feature! The pin-out of this board matches the FTDI cable to work with official Arduino and cloned 3.3V Arduino boards. It can also be used for general serial applications.

This board still brings out the DTR pin as opposed to the RTS pin of the FTDI cable. The DTR pin allows an Arduino target to auto-reset when a new Sketch is downloaded. This is a really nice feature to have and allows a sketch to be downloaded without having to hit the reset button. This board will auto-reset any Arduino board that has the reset pin brought out to a 6-pin connector.

The coolest thing about the FT231X Breakout is that we have broken out ALL the pins for your use, making this board all the more hackable! It also uses a common microUSB jack.

One of the features of this board is a jumper on the back, which allows the VCC output to be configured to either 3.3V or 5V. This board ships default to 5V, but you can cut the default trace and add a solder jumper if you need to switch to 3.3V. It should be noted that the max input of the FT231X is only 3.3V, but it can operate down to 1.8V with external pull-ups and is also 5V tolerant.

Documents:

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Customer Comments

  • I’m confused. According to the schematic the ONLY thing the 3/5 volt jumper changes is the level converter output for the reset/DTR signal. The tx, rx, cts, and other signals remain at 3.3 volts. Why?

  • What changed between this one and the last one?

    • Based on the two products' images and earlier comments/complaints, this one probably has a stronger Micro USB terminal-to-board connection. The obvious physical difference is that this board’s length has increased slightly (likely to allow more durable connector-board interface, as the USB area is now enlarged). Output pin dimensions appear to be unchanged.

  • What would be great is a chart of all of these types of breakouts you offer and the differences. Thanks.

    • Well, most of our breakouts support vastly different functions (some of which don’t correlate with each other). We are, however, currently working on our buying guides that support a given purpose of each type of board (accelerometer, motor driver, USB cables, etc). These should be ready by the holiday rush. :)

      • I think Bob is just talking about a comparison of USB/UART adapters. After all, you do have this and 7 other s not counting 11736 that this product is replacing…and these are just the ones I could quickly find: 9716, 9873, 10275, 12731, 12935, 13746, 11814.

Customer Reviews

5 out of 5

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Works as expected

Title says it all really. I use it with several Arduino Mini Pro’s and it just works like you expect it too.