This part is a kind of semiconductor called PL-2303.

Function of this product has PL-2303 USB to RS-232 Bridge Controller.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

PL-2303 USB to RS-232 Bridge Controller Product Datasheet Document Revision 1.4 Document Release: August, 2002 Prolific Technology Inc. Release Date: July, 2002 ds_pl2303_v14 Revision History Revision 1.4 1.3 1.2 • • • • • • • Description Add Windows CE .NET support feature Buffer for upstream and downstream data flow – change from 96 to 256 bytes For Chip Version H (date code 0206) Add OS Support in Features Section Correct default values in Table 5. Device Configuration Register Add Suspend Current in DC Characteristics Section Move Operating Temperature in DC Characteristics to new section Date August 29, 2002 August 01, 2002 July 03, 2002 PL-2303 Product Datasheet -2- Document Revision 1.3 Release Date: July, 2002 ds_pl2303_v14 PL-2303 USB to Serial RS232 Brid [ ... ]

PL-2303 PDF Datasheet Download