Future Technology Devices International Limited (FTDI) has added a series of USB to digital level interface modules, in DB9 form factors, to its product portfolio. The new DB9-USB-D3-F (3.3 V output female connector), DB9-USB-D3-M (3.3 V output male connector), DB9-USB-D5-F (5 V output female connector) and DB9-USB-D5-M (5 V output male connector) enable implementation of USB interconnection into legacy equipment without the need for alteration of the enclosure or for any noticeable increase in the overall bill of materials.