I need an IC for two separate functions.
The first is level translation from 3.3 V to 5V, so that I can use a TFT touch screen with an Arduino Uno. In order for the touch function to work, level translation from 3.3 V to 5 V is needed. Level translation from 5 V to 3.3 V can be done with voltage dividing resistors, but I hope the chip can do this as well.
The second function is to act as a buffer that has output enable, in order to control SPI output from a 74HC165 chip. That chip does not have output enable, and seems to be on all the time, interfering with other SPI signals.
I think that the 74HC125 Will perform both of these functions. My question is, what is the difference between 74HC125 and 74HCT125? I know that the latter is TTL, and the former is CMOS. But other than that, I am not sure which one I should get.
Any help would be greatly appreciated.