> Interface Circuits For TIA/EIA-485 (Texas) The specific document you want is SLLA036A. Use their search to look for slla036a in Technical Documents. It's a 139kB pdf, about 20 pages -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads