Copyright © 2011 Future Technology Devices International Limited 1
Document No.: FT_000329
FT232BL/BQ USB UART IC Datasheet Version 2.2
Clearance No.: FTDI# 171
Future Technology
Devices International Ltd.
FT232BL/BQ USB UART IC
The FT232B is a USB to serial UART
interface with the following advanced
features:
Single Chip USB to Asynchronous Serial
Data Transfer
Full Handshaking & Modem Interface
Signals
UART I/F Supports 7 / 8 Bit Data, 1 / 2
Stop Bits and Odd/Even/Mark/Space/No
Parity
Data rate 300 => 3M Baud (TTL)
Data rate 300 => 1M Baud (RS232)
Data rate 300 => 3M Baud
(RS422/RS485)
384 Byte Receive Buffer / 128 Byte
Transmit Buffer for high data throughput
Adjustable RX buffer timeout
Fully Assisted Hardware or X-On / X-Off
Handshaking In-built support for event
characters and line break condition
Auto Transmit Buffer control for RS485
Support for USB Suspend / Resume
through SLEEP# and RI# pins
4.35V to 5.25V single supply operation
Support for high power USB Bus powered
devices through PWREN# pin
Integrated level converter on UART and
control signals for interfacing to 5V and
3.3V logic
Integrated 3.3V regulator for USB IO
Integrated Power-On-Reset circuit
Integrated 6MHz – 48Mhz clock multiplier
PLL
UHCI / OHCI / EHCI host controller
compatible
USB 1.1 and USB 2.0 compatible
USB VID, PID, Serial Number and Product
Description strings in external EEPROM
EEPROM programmable on-board via USB
Available as a compact lead free RoHS
compliant 32-LD LQFP package (FT232BL) or
32-LD QFN package (FT232BQ).
Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or reproduced
in any material or electronic form without the prior written consent of the copyright holder. This product and its documentation are
supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied. Future Technology
Devices International Ltd will not accept any claim for damages howsoever arising as a result of use or failure of this product. Your
statutory rights are not affected. This product or any variant of it is not intended for use in any medical appliance, device or system in
which the failure of the product might reasonably be expected to result in personal injury. This document provides preliminary
information that may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied by
the publication of this document. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park,
Glasgow G41 1HH United Kingdom. Scotland Registered Company Number: SC136640
Copyright © 2011 Future Technology Devices International Limited 2
Document No.: FT_000329
FT232BL/BQ USB UART IC Datasheet Version 2.2
Clearance No.: FTDI# 171
1 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 Industrial Control
USB MP3 Player Interface
Set Top Box PC - USB interface
USB Hardware Modems
USB Wireless Modems
USB Bar Code Readers
USB Smart Card Readers
USB Instrumentation
1.1 Driver Support
Royalty free VIRTUAL COM PORT
(VCP) DRIVERS for...
Windows 98, 98SE, ME, 2000, Server 2003, XP
and Server 2008
Windows 7 32, 64-bit
Windows XP and XP 64-bit
Windows Vista and Vista 64-bit
Windows XP Embedded
Windows CE 4.2, 5.0 and 6.0
Mac OS 8/9, OS-X
Linux 2.4 and greater
Royalty free D2XX Direct Drivers
(USB Drivers + DLL S/W Interface)
Windows 98, 98SE, ME, 2000, Server 2003, XP
and Server 2008
Windows 7 32, 64-bit
Windows XP and XP 64-bit
Windows Vista and Vista 64-bit
Windows XP Embedded
Windows CE 4.2, 5.0 and 6.0
Linux 2.4 and greater
The drivers listed above are all available to download for free from FTDI website (www.ftdichip.com).
Various 3rd party drivers are also available for other operating systems - see FTDI website
(www.ftdichip.com) for details.
For driver installation, please refer to http://www.ftdichip.com/Documents/InstallGuides.htm
1.2 Part Numbers
Table 1.1 Part Numbers
Note: Packing codes for xxxx is:
- Reel: Taped and Reel, (LQFP is 1,000pcs per reel, QFN is 2,500pcs per reel).
- Tray: Tray packing, 250pcs per tray (LQFP only)