Download the FT232B USB UART IC Driver here however note that it is highly recommended that you use the FT232R USB UART version in any new designs. The FT232B, being the 2nd generation USB UART device from FTDI, offers enhanced features compared to its predecessor, the FT8U232AM.


Additionally, the FT232BL serves as a lead-free variant of the FT232BM. Moreover, for those preferring a QFN-32 lead-free package, the FT232BQ presents the same functionality as the FT232BL.

This device not only incorporates additional functionality and reduces the number of external components required but also maintains a high level of pin compatibility with the original version. As a result, upgrading or cost-reducing existing designs becomes effortless, while simultaneously expanding the possibilities of utilizing this device in new application areas.

Hardware Features

The single chip USB with asynchronous serial data transfer capabilities offers a range of features and options. With full handshaking and modem interface signals, it ensures reliable communication. Likewise the UART interface of this chip supports various configurations, including 7 or 8 data bits, 1 or 2 stop bits, and a choice of Odd/Even/Mark/Space/No Parity. This flexibility enables compatibility with different serial communication protocols.

When it comes to data transfer rates, the chip exhibits impressive performance. It supports data transfer rates from 300 Baud up to 3M Baud for TTL interfaces, providing efficient and fast communication. For RS232 interfaces, the data transfer rate reaches up to 1M Baud at 300 Baud. Furthermore, for RS422/RS485 interfaces, the chip enables data transfer rates of up to 3M Baud.

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To ensure smooth data flow, the chip features a generous 384 Byte Rx buffer and 128 Byte Tx buffer. This allows for high data throughput and efficient handling of incoming and outgoing data. The Rx buffer timeout is adjustable, offering flexibility in configuring the timing of data reception. In addition also see the FT231X – Full Speed USB to Full UART as well as the FT232R Drivers in different operating systems.

Additional Features

The chip provides multiple options for handshaking. It supports fully assisted hardware handshaking or X-On/X-Off handshaking, allowing for reliable flow control. Additionally, it includes built-in support for event characters and line break conditions, facilitating efficient data processing.

In RS485 applications, the chip offers auto transmit buffer control, simplifying the management of data transmission. Moreover, it supports USB suspend and resume through the SLEEP# and RI# pins, enabling power-saving features. For high-power USB bus-powered devices, the PWREN# pin provides the necessary support.

For seamless integration with different logic voltage levels, the chip incorporates an integrated level converter on UART and control signals. This ensures compatibility with both 5V and 3.3V logic systems. Additionally, it includes an integrated 3.3V regulator for USB IO, simplifying the power supply configuration.

Chip Summary

To ensure proper initialization and reliable operation, the chip incorporates an integrated Power-On-Reset circuit. It also features a versatile 6MHz – 48MHz clock multiplier PLL, providing flexible clocking options for different applications. In terms of USB data transfer modes, the chip supports both Bulk and Isochronous modes, catering to a variety of data transfer requirements.

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With a single supply operating voltage range of 4.35V to 5.25V, the chip offers flexibility and compatibility with different power supply configurations. In terms of compatibility with host controllers, the chip is designed to work seamlessly with UHCI, OHCI, and EHCI host controllers. This ensures compatibility with a wide range of USB host systems.

The chip is fully compatible with both USB 1.1 and USB 2.0 specifications, allowing for seamless integration into various USB environments. Moreover, it supports USB VID (Vendor ID), PID (Product ID), serial number, and product description strings, which can be stored in an external EEPROM. The EEPROM can be conveniently programmed on-board via the USB interface.

In a compact form factor, the chip is available in either a 32-LD LQFP or QFN-32 package. Additionally, it is available as a lead-free device, compliant with the EU directive 2002/95/EG RoHS, ensuring environmentally friendly manufacturing practices. Lastly also see the Introduction – What is a ft232r driver and what does it do? as well as the 10 Reasons Why You Need FT232R Drivers Installed & Working Properly.


D2XX Direct Drivers

Windows (Desktop) 2021-07-15

FT232B Driver X86 (64-Bit)

FT232B 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

FT232B Driver X86 (64-Bit)

FT232B Driver X86 (32-Bit)



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