Datasheet
  Copyright © 2011 Future Technology Devices International Limited  7 
Document Reference No.: FT_000204 
DB9-USB Datasheet 
Version 2.1 
Clearance No.: FTDI# 130 
Table of Contents: 
1  Introduction ................................................................................... 1 
1.1  The DB9-USB Family of UART Converter Modules .......................................... 1 
1.2  Functional Description .................................................................................. 1 
1.3  Background ................................................................................................... 2 
1.4  Block Diagrams ............................................................................................. 3 
1.4.1  Block description ....................................................................................... 3 
1.5  Features ........................................................................................................ 5 
1.6  Technical Specification & Ordering Information ............................................ 6 
2  USB Connections ............................................................................ 8 
3  UART Connections .......................................................................... 9 
3.1.1  Male DB9 UART Connector Signals ............................................................. 11 
3.1.2  Female DB9 UART Connector Signals ......................................................... 12 
4  Installation ................................................................................... 13 
4.1  Device Driver Installation ........................................................................... 13 
4.1.1  Microsoft Windows Installation .................................................................. 13 
4.1.2  Mac OS X, Linux, Windows CE ................................................................... 17 
5  Electrical details ........................................................................... 18 
5.1  USB ............................................................................................................. 18 
5.2  RS232 Level UART ....................................................................................... 18 
5.3  3.3V Level UART .......................................................................................... 18 
5.4  5V Level UART ............................................................................................. 18 
6  Mechanical Details ........................................................................ 19 
7  Physical Environment Details ....................................................... 20 
7.1  Storage ....................................................................................................... 20 
7.2  Operating .................................................................................................... 20 
8  Environmental Approvals & Declarations ...................................... 21 
8.1  EMI Compatibility ........................................................................................ 21 
8.2  Safety.......................................................................................................... 21 
8.3  Environmental ............................................................................................. 21 
8.4  Reliability .................................................................................................... 21 
8.5  Import / Export Information ....................................................................... 22 
9  Troubleshooting ........................................................................... 22 
10  Contact Information ..................................................................... 23 
Appendix A – References....................................................................................... 25 
Appendix B – Revision History .............................................................................. 25 










