FT232R - USB to serial UART interface IC

The FTDI FT232R is a USB to serial UART interface with optional clock generator output, and the FTDIChip-ID™ security dongle feature. USB to serial designs using the FT232R have been further simplified by fully integrating the external EEPROM, clock circuit and USB resistors onto the device.

FT232RL-C-REEL100 & FT232RQ-C-REEL100 available from our Webshop

The FTDI FT232R is a USB to serial UART interface with optional clock generator output, and the FTDIChip-ID™ security dongle feature. In addition, asynchronous and synchronous bit bang interface modes are available. USB to serial designs using the FT232R have been further simplified by fully integrating the external EEPROM, clock circuit and USB resistors onto the device.

The FT232R adds two new functions compared with its predecessors (FT8U232A/FT232BM), effectively making it a "3-in-1" chip for some application areas. The internally generated clock (6MHz, 12MHz, 24MHz, and 48MHz) can be brought out of the device and used to drive a microcontroller or external logic. A unique number (the FTDIChip-ID™) is burnt into the device during manufacture and is readable over USB, thus forming the basis of a security dongle which can be used to protect customer application software from being copied.

Key Features:

  • Single chip USB to asynchronous serial data transfer interface.
  • Entire USB protocol handled on the chip - No USB-specific firmware programming required.
  • USB FTDIChip-ID™ feature.
  • Configurable CBUS I/O pins.
  • Integrated 1024 bit internal EEPROM for I/O configuration and storing USB VID, PID, serial number and product description strings.
  • Device supplied preprogrammed with unique USB serial number.
  • Support for USB suspend / resume.
  • Integrated power-on-reset circuit.
  • Fully integrated clock - no external crystal, oscillator, or resonator required.
  • Fully integrated AVCC supply filtering - No separate AVCC pin and no external R-C filter required.
  • 3.3V to 5.25V Single Supply Operation.
  • Low operating and USB suspend current.
  • Low USB bandwidth consumption.
  • USB 2.0 Full Speed compatible.
  • -40°C to 85°C extended operating temperature range.
  • Available in compact Pb-free 28 Pin SSOP and QFN-32 packages (both RoHS compliant).

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  • Single chip USB to asynchronous serial data transfer interface.
  • Entire USB protocol handled on the chip - No USB-specific firmware programming required.
  • UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity.
  • Fully assisted hardware or X-On / X-Off software handshaking.
  • Data transfer rates from 300 baud to 3 Megabaud (RS422 / RS485 and at TTL levels) and 300 baud to 1 Megabaud (RS232).
  • In-built support for event characters and line break condition.
  • New USB FTDIChip-ID™ feature.
  • New configurable CBUS I/O pins.
  • Auto transmit buffer control for RS485 applications.
  • Transmit and receive LED drive signals.
  • New 48MHz, 24MHz,12MHz, and 6MHz clock output signal Options for driving external MCU or FPGA.
  • FIFO receive and transmit buffers for high data throughput.
  • 256 Byte receive buffer and 128 Byte transmit buffer utilising buffer smoothing technology to allow for high data throughput.
  • Adjustable receive buffer timeout.
  • Synchronous and asynchronous bit bang mode interface options with RD# and WR# strobes.
  • New CBUS bit bang mode option.
  • Integrated 1024 bit internal EEPROM for I/O configuration and storing USB VID, PID, serial number and product description strings.
  • Device supplied preprogrammed with unique USB serial number.
  • Support for USB suspend / resume.
  • Support for bus powered, self powered, and high-power bus powered USB configurations.
  • Integrated 3.3V level converter for USB I/O .
  • Integrated level converter on UART and CBUS for interfacing to 5V - 1.8V Logic.
  • True 5V / 3.3V / 2.8V / 1.8V CMOS drive output and TTL input.
  • High I/O pin output drive option.
  • Integrated USB resistors.
  • Integrated power-on-reset circuit.
  • Fully integrated clock - no external crystal, oscillator, or resonator required.
  • Fully integrated AVCC supply filtering - No separate AVCC pin and no external R-C filter required.
  • UART signal inversion option.
  • USB bulk transfer mode.
  • 3.3V to 5.25V Single Supply Operation.
  • Low operating and USB suspend current.
  • Low USB bandwidth consumption.
  • UHCI / OHCI / EHCI host controller compatible.
  • USB 2.0 Full Speed compatible.
  • -40°C to 85°C extended operating temperature range.
  • Available in compact Pb-free 28 Pin SSOP and QFN-32 packages (both RoHS compliant).
  • 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 / Writers
  • Set Top Box PC - USB interface
  • USB Digital Camera Interface
  • USB Hardware Modems
  • USB Wireless Modems
  • USB Bar Code Readers
  • USB Software / Hardware Encryption Dongles
Part Number Package Type Pack Size
FT232RL-C-REEL 28-pin SSOP Reel of 2000
FT232RL-C-REEL1000 28-pin SSOP Reel of 1000
FT232RL-C-REEL500 28-pin SSOP Reel of 500
FT232RL-C-REEL250 28-pin SSOP Reel of 250
FT232RL-C-REEL100 28-pin SSOP Reel of 100
FT232RL-C-TUBE 28-pin SSOP Tube of 47
FT232RQ-C-REEL 32-pin QFN Reel of 6000
FT232RQ-C-REEL1000 32-pin QFN Reel of 1000
FT232RQ-C-REEL500 32-pin QFN Reel of 500
FT232RQ-C-REEL250 32-pin QFN Reel of 250
FT232RQ-C-REEL100 32-pin QFN Reel of 100
FT232RQ-C-TRAY 32-pin QFN Tray of 490
UM232R 2 x 12-pin Headers Each

UM232R

The UM232R module is a USB - Serial UART (TTL) development module for the FT232R IC device. The module supports USB to UART interfacing at 5V / 3V TTL levels. Voltage levels are set via onboard jumpers. I/O headers available to provide access to all UART and CBUS interface pins of the FT232R device.

Versatile Range of Evaluation Kits

The FTDI extensive range of evaluation kits represent the quickest way to get learn about USB, with many of the kits allowing you to get running in less than 30 minutes.

Volume pricing is available which is flexible enough to mean you could embed a module within your design for minimal time-to-market turnaround.

Custom PID service
For volume applications Alpha Micro can provide a Product Identifier (PID) under the FTDI "umbrella scheme" that can be used to personalise a design based on the FT232Rx so that your end user will see your product name in the Windows Install Wizard for extra brand awareness.

There is an added benefit that the driver is tagged to your hardware and cannot be used by other devices. This feature can only be used with FTDI chips, the Vendor ID (VID) must remain untouched. Please contact our sales team for more information on this facility.

Customers should use MPROG to program this feature and any other changes to the default settings within the EEPROM (which must be fitted if this feature is required). MPROG is free to use and performs the programming tasks over the USB.

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Last updated: 19 June 2015