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 FT231X – Full Speed USB to Full Handshake UART

This USB2.0 Full Speed  IC offers a compact bridge to full handshake UART interfaces. The device is a UART, capable of operating up to 3MBaud, with low power consumption (8mA). The FT231X includes the complete FT-X series feature set and enables USB to be added into a system design quickly and easily over a UART interface

 Key Hardware Features
  • Single chip USB to asynchronous serial data transfer interface.
  • Entire USB protocol handled on the chip. No USB specific firmware programming required.
  • Fully integrated 2048 byte EEPROM for storing device descriptors and CBUS I/O configuration.
  • Fully integrated clock generation with no external crystal required plus optional clock output selection enabling a glue-less interface to external MCU or FPGA.
  • Data transfer rates from 300 baud to 3 Mbaud.
  • 512 byte receive buffer and 512 byte transmit buffer utilising buffer smoothing technology to allow for high data throughput.
  • FTDI’s royalty-free Virtual Com Port (VCP) and Direct (D2XX) drivers eliminate the requirement for USB driver development in most cases.
  • Configurable CBUS I/O pins.
  • Transmit and receive LED drive signals.
  • UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity
  • Synchronous and asynchronous bit bang interface options with RD# and WR# strobes.
  • Battery Charger Detection. May be used by mobile devices to detect the presence of a charger on the USB port to enable higher current / faster charging of batteries.
  • Device supplied pre-programmed with unique USB serial number.
  • Supports bus powered, self powered and high-power bus powered USB configurations.
  • Integrated +3.3V level converter for USB I/O.
  • True 3.3V CMOS drive output and TTL input.
    • (operates down to 1V8 with external pull ups and is also 5V tolerant)
  • Configurable I/O pin output drive strength.
  • Integrated power-on-reset circuit.
  • UART signal inversion option.
  • Internal 3.3V/1.8V LDO regulators
  • Low operating current of 8mA (typical) and USB suspend current of 125uA (typical) current.
  • Low USB bandwidth consumption.
  • UHCI/OHCI/EHCI host controller compatible.
  • USB 2.0 Full Speed compatible.
  • Extended operating temperature range: -40°C to 85°C
  • Available in compact Pb-free 20 Pin SSOP and QFN packages (both RoHS compliant).
Product information

Typical Applications
  • USB to RS232/RS422/RS485 Converters
  • Upgrading Legacy Peripherals to USB
  • Cellular and Cordless Phone USB data transfer cables and interfaces
  • Interfacing MCU/PLD/FPGA based designs to USB
  • USB Audio and Low Bandwidth Video data transfer
  • PDA to USB data transfer
  • USB Smart Card Readers
  • USB Instrumentation
  • USB Industrial Control
  • USB MP3 Player Interface
  • USB FLASH Card Reader and Writers
  • Set Top Box PC - USB interface
  • USB Digital Camera Interface
  • USB Hardware Modems
  • USB Wireless Modems
  • USB Bar Code Readers
  • Dedicated Charger Port (DCP) detection enabling battery charging at higher current for faster charge times.  
Related Products

UMFT231XA - FT231XQ Based USB to Full Handshake UART Development Module
UMFT231XB - FT231XQ Based USB to Full Handshake UART Breakout Module
UMFT231XC - FT231XQ Based USB to Full Handshake UART and Battery Detection Development Module

For more information on these modules click here



© Future Technology Devices International Ltd. 2014