UhClem

For documents, use Google or other search engine. I think you are confusing the signal requirements on the RS485 side and the micro-controller side. The RS485 side can handle voltages in excess of Vcc. See data sheet. (Common mode range: -7V to...

Or use one of the many MAXIM 3.3V RS485 chips.

Art and Science of RS485 from Circuit Cellar Ink magazine way back in 1999 is always a good thing to read when starting out with RS485. Google usually turns up a link or two to a copy. Some of the MAXIM chips have slightly altered input...