HOW TO MULTIPLEX A 1-WIRE MASTER INTO NUMEROUS CHANNELS
Optionally, the mux (U2) has external, post-mux, pullup resistors (RP4 and RP5) to provide power for idle 1-Wire slaves when the switches are open. If this is not done, each time a channel switch is connected, the µC must wait the maximum wake-up time of the connected slaves on that channel (usually 2ms) before beginning communication. […]
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