What is the Logic Power Supply input on these chips for? I can't say I've come across that on any other chip. It's not referenced in the datasheet, just stated that it's +5V.
I'm assuming that if I want to use 3.3V logic that I need to send this pin 3.3V, is that how it works? Basically just a reference for the logic level or does it require +5V to power something inside the chip?