BillO:
You could use something like this. The MOSFET is not critical and any small signal N-channel MOSFET capable of a few ma with a maximum GS threshold of 2V or less should do.
How do you think the 10K R of the level translator will affect the Rpup of the 1-wire bus.
Shall we put no extra Rpup and use the one of the translator in its place.
Or shall we put in each logic side, and Rpup in parallel with the translator 10k R