Other Parts Discussed in Thread: TXU0204
I used TXB0104 for 3.3V UART translate to 1.8V.
However, the UART can't be workable. UART signal is only high or low. Even I added the external P/U resistor 5k ohm or 50k ohm, it still can't work.
I changed the level shift IC from TXB0104 to TXS0108, and then the UART function is workable.
The application of TXB0104 is also suggested for UART. I can't understand why it can't be applied.