I have two power supplies that are always on, 1.8V and 3.3V. I would like to determine if this part is suitable to operate on the 3.3V supply and switch the common between 3.3V or 1.8V (SPDT). The common current is about 20ma to supply the I/O pin voltage on a few parts. Will this work and is this the best part for this? The common IN pin, used to switch the common, is a 3.3V signal.