Other Parts Discussed in Thread: TXU0202
We have two processors connected together through two UART channels. We are using the TXS0102DQMR to translate between 3.3V and 1.8V. IT seems pretty simple, but we are seeing a slightly odd/loaded waveform that I was hoping you could help describe what is happening. It seems like we see the same thing for the RX input on the 3.3V side as well. here is some debugging on the 1.8V side.
Design as is: 1.8V signal is more like 1.5 or 1.6V
Cut the net to remove the RX processor pin: Seems to be at 1.8V
Left the signal isolated but put a 100k pulldown to simulate a loaded condition if that is what is happening.
Can you describe how this part should be designed in? Is the internal pull up the only way to drive a high voltage? We are trying to get pin configuration confirmed for the processors, but don't know those yet for sure. Also, why does the start of a rising transition go higher then fall back down?
