I am looking at a system where I need to lower Vdd from 5v to 3.3v. However the ST232 (same as a MAX232), but that's rated only for 5v. Even if the logic works the same since it's a capacitive charge pump obviously any change in Vdd will be reflected in its output level which could make its output levels unreadable by another receiver.
I don't want to use 2 regs. Is there a RS232 transceiver that runs on 3.3v? It would preferrably need to be a very low current device like the ST232.