Le Guidelines della Maxim dicono:
"Network Description
The scope of this document is limited to 1-Wire networks that use Category 5, twisted-pair copper wire and have 5V bus power supplied by the master. (Most 1-Wire slaves will operate at lower bus voltages, but large networks often have too much loss to perform well under low-voltage conditions.)"
Quindi il doppino deve essere intrecciato!?!