I want to make serial communication with a device which works on 0-5 Volt TTL level. But my serial chip uses 3.3 Volt logic. (this is an UART communication)
I know that I need a step down at least for the TX pin of device (which will be RX on my serial chip). I wanted to go with normal resistor voltage divider but I'm assuming it will cause problems in high speed transmissions. Can you recommend a good, easy to use chip for this task?
Also, do I need to have a voltage step up from 3.3V to 5V for the device's RX (my serial chip's TX)? I heard that anything above 2.4 volts should be considered high. What do you think?
And I have question about whether the converter should be inverting or not? How can I determine this?