Hi,
I have a 5 volt lcd with 8 bi-directional data lines and a 3.3 volt processor. The the LCD will take a 3.3 volt input and a logic high, but the 5 volt output from the lcd is too much for the mcu.
What I have decided to do is use a 74**245 octal bus transceiver running at 3.3 volt. The 74245 can take a 5 volt input, but the datasheet says it has a 5 volt tolerant output. Does this mean, regardless of Vcc, The voltage on the input pin will be on the output pin?