FT231X USB to Full Handshake UART

Download the FT231X USB to Full Handshake UART driver here. The FT231X is a USB2.0 Full Speed IC that seamlessly connects full handshake UART interfaces. As a UART device, it supports data transfer rates up to 3M Baud while consuming low power (8mA).

FT231X USB to Full Handshake UART

With the comprehensive FT-X series feature set, it simplifies the integration of USB into system designs through a UART interface. This compact bridge offers reliable and efficient USB connectivity, enhancing the versatility and compatibility of various applications.

Hardware Features

The Single chip USB to asynchronous serial data transfer interface provides a seamless solution for connecting USB to asynchronous serial devices. With the entire USB protocol handled on the chip, there is no need for USB-specific firmware programming. The device features a fully integrated 2048 byte EEPROM for storing device descriptors and CBUS I/O configuration, making it convenient to configure and customize.

The integrated clock generation eliminates the need for an external crystal and offers optional clock output selection, enabling a hassle-free interface to external MCUs or FPGAs. The data transfer rates range from 300 baud to 3 Mbaud, catering to various communication needs. The receive and transmit buffers, each with a capacity of 512 bytes, utilize buffer smoothing technology to ensure efficient and high-speed data throughput. In addition to compare, also look at the FT230X Basic UART Driver and FT232RL USB to Serial Driver on this website.

See also  Serial Port Cards

Driver Software

FTDI provides royalty-free Virtual Com Port (VCP) and Direct (D2XX) drivers, simplifying USB driver development in most cases. The CBUS I/O pins are configurable, allowing for flexible I/O configurations. Additionally, the device supports transmit and receive LED drive signals, facilitating visual feedback during data transfer operations.

The UART interface offers support for 7 or 8 data bits, 1 or 2 stop bits, and various parity options, providing versatility in data transmission. Furthermore, the device offers synchronous and asynchronous bit bang interface options with RD# and WR# strobes, expanding its range of applications.


The Battery Charger Detection feature is particularly useful for mobile devices as it enables the detection of a charger on the USB port, facilitating higher current and faster charging of batteries. Each device is pre-programmed with a unique USB serial number, ensuring identification and differentiation.

The device is compatible with bus-powered, self-powered, and high-power bus-powered USB configurations, accommodating different power requirements. It integrates a +3.3V level converter for USB I/O, offering seamless communication between different voltage levels. The True 3.3V CMOS drive output and TTL input ensure reliable signal transmission, with the capability to operate down to 1V8 with external pull-ups. Additionally, the I/O pin output drive strength is configurable, allowing for customization based on specific needs.


In addition an integrated power-on-reset circuit ensures reliable startup and operation. The UART signal inversion option provides flexibility in signal inversion requirements. The device incorporates internal 3.3V/1.8V LDO regulators, enabling stable voltage regulation for optimal performance. Likewise see also the FT231X – Full Speed USB to Full UART as well as the FT231X USB UART Driver.

See also  Hardware ID

Likewise with a low operating current of 8mA (typical) and USB suspend current of 125uA (typical). Additionally the device is power-efficient. It consumes low USB bandwidth, maximizing the available bandwidth for other USB devices.

Moreover the compatibility with UHCI/OHCI/EHCI host controllers ensures seamless integration with different host controller architectures. Furthermore, it is fully compatible with USB 2.0 Full Speed, providing reliable and high-speed USB connectivity.

Note that the device operates reliably across an extended temperature range of -40°C to 85°C, making it suitable for various environmental conditions. Likewise it is available in compact Pb-free 16 Pin SSOP and QFN packages, complying with RoHS regulations for environmentally friendly manufacturing processes.

Application Usage

In addition the USB to RS232/RS422/RS485 Converters provide seamless connectivity between USB and legacy devices. Likewise enabling the upgrade of outdated devices to USB compatibility. These converters are versatile and find applications in various scenarios, such as transferring data between cellular and cordless phones and USB interfaces.

Also facilitating communication between MCU/PLD/FPGA based designs and USB, and enabling USB-based audio and low bandwidth video transfer. Additionally, they support PDA to USB data transfer, making it convenient to connect PDAs to USB-enabled devices for easy data exchange.


D2XX Direct Drivers

Windows (Desktop) 2021-07-15

FT231X Driver X86 (64-Bit)

FT231X Driver X86 (32-Bit)

Windows RT Driver (ARM) (2014-07-04)

Linux X64 (64-Bit) / X86 (32-Bit)  (2020-05-18)


VCP Drivers

Windows (Desktop) 2021-07-15

FT231 X Driver X86 (64-Bit)

FT231X Driver X86 (32-Bit)