Prices 2019 - Rs232 Db9, Future technology devices international ltd - ftdi, Copyright © 2011 future technology devices international limited 1 document reference no.: ft_000204 db9-usb datasheet version 2.0 clearance no.: ftdi# 130. Usb to rs232 serial adapter cable | serial cards, The icusb232v2 1 port usb to serial adapter converts a usb port into an rs232 db9 serial port to connect to, monitor, and control a serial device.. Db9 pinout, D-sub 9 connector pinout . pinout and diagram of de9 connector (db9 connector), commonly used for serial ports (rs-232)..