FT231X USB UART Driver

USB DriverThis is the ft231x usb uart driver or ft231x usb uart driver Windows 10. The Thunderlinx USB to Serial adapter is most probably the most well known USB to serial adapter that uses the FT231X processor. This USB to Serial adapter converts serial data to USB data and vice versa. There are a few advantages to this newer technology as have been explained below and may be of interest to you if you are in a complex environment. See also here.

FT231X USB UART Driver

You will note that the FT231X processor which is manufactured by FTDI Semiconductors is a much newer as well as a much optimised version of the rather popular FT232RL processor. This processor is more reliable as well as having the ability to access the memory as well as address it as the processor uses MTP memory and no EEPROM. The LED lights up when connected to the USB port.

There is also the ability to add additional power to the adapter being a 5V DC on pin 9 and it is limited to around 450mA which will not damage your USB port if something goes wrong. Data transfer rates are up to 921,600 bps (auto detection of data speed + (up to 3 Mbps by using aliasing)), multiple indication LED lights as well as being USB port powered makes for a great FT231X USB to serial adapter. Also see the FT232RL USB to Serial Adapter Driver as well as 5 Ways To Use The UART Bridge.

FT231x usb uart driver Specifications


FT231X USB to Serial Adapter FT231X USB to Serial Adapter FT231X USB to Serial Adapter

Processor FTDI FT231X
Serial driver Exar SP3243EUEA-L
Unique chipID no. Each converter has it own unique ID number
RS232 Interface Also RS232 DB9 Male
RS232 output power ~5.7VDC
Pin 9 output power 5VDC max limited at 450mA
Cable length 3 feet
USB interface Standard Type A Male
Indication LEDs Power, TX, RX, COM Port Ready, AUX Limit
Ports 1-port
Signals TX, RX, RTS, CTS, DTR, DSR, RI and GND
Baud rate 300-921,600bps (up to 3Mbps by using alising)
Parity None, Odd, Even, Mark, Space
Data Bits 7, 8
Stop Bits 1, 2
TX / RX buffer size 512 Byte Transmit Buffer / 512 Byte Receive Buffer


FT231X USB UART Hardware

Device Name: FT231X USB UART
Hardware ID:
USB\VID_0403&PID_6015Compatible ID:

These driver are for all versions of Windows as well as the MAC and Linux for the ft231x usb uart driver and the ft231x usb uart driver Windows 10 as seen below. The hardware ID’s are shown above.


driver download

D3XX Driver v1.3.0.4 (June 28, 2019)

Windows 10, Win 8.1, Win 8,  Win 7 (x32/x64)

FT231X Driver Windows


driver download

D3XX for macOS 0.5.21 (Sep 7 2017)

FT231X Driver Mac OS X 0.5.21



About Tracey Brown

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