74HC245 is not 5V tolerant at VCC=3.3V. It might work but it's outside maximum rating. I suggest 74LVC245A. Its inputs are 5V tolerant at VCC=3.3V, as are its outputs when tristated. Alternatively, a current limiting series resistors can be used with 74HC family. Current limiting series resistors are not suitable for RP2040, though.
Statistics: Posted by alastairpatrick — Thu Oct 24, 2024 12:55 pm