Document No.: FT_000329
FT232BL/BQ USB UART IC Datasheet Version 2.2
Clearance No.: FTDI# 171
Table of Contents
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Typical Applications...................................................................... 2
1.1 Driver Support.................................................................................... 2
1.2 Part Numbers...................................................................................... 2
FT232B Block Diagram ................................................................. 3
Device Pin Out and Signal Description.......................................... 6
3.1 32 Pin LQFP Package .......................................................................... 6
3.2 32 Pin QFN Package............................................................................ 7
3.3 LQFP and QFN Package Pin Out Description........................................ 8
Function Description................................................................... 10
4.1 Key Features and Enhancements from FT8U232AM .......................... 10
4.2 Functional Block Descriptions........................................................... 12
Devices Characteristics and Ratings........................................... 14
5.1 Absolute Maximum Ratings............................................................... 14
5.2 DC Characteristics............................................................................. 15
USB Power Configurations.......................................................... 17
6.1 USB Bus Powered Configuration ...................................................... 17
6.2 Self Powered Configuration .............................................................. 18
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4
5
6
6.3 Interfacing to 3.3V Logic .................................................................. 19
6.3.1 Bus Powered Circuit with 3.3V logic drive / supply voltage .............................................. 19
6.3.2 Self Powered Circuit with 3.3V logic drive / supply ......................................................... 20
6.4 Bus Powered Circuit (<=100mA) with Power Control....................... 21
Device Configuration Examples .................................................. 22
7.1 Oscillator Configurations .................................................................. 22
7.2 EEPROM Configuration...................................................................... 23
UART Interface Configurations................................................... 24
8.1 USB <=> RS232 Converter Configuration......................................... 24
8.2 USB <=> RS422 Converter Configuration......................................... 25
8.3 USB <=> RS485 Converter Configuration......................................... 26
LED Interface Configuration ....................................................... 27
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8
9
10 Package Parameters................................................................... 28
10.1
10.2
LQFP Package Dimension............................................................... 28
QFN Package Dimension ................................................................ 29
11 Contact Information................................................................... 30
Appendix A – References........................................................................... 31
Appendix B – List of Figures and Tables .................................................... 32
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