Seems like the 1-wire options are reducing by the minute as Maxim withdraw devices without providing an alternative
Maxim have discontinued the DS2450
Believe it or not there are still several 1-wire chips left in production
I've been through the list and just the following six devices seem of any use to me :-
DS18B20 Digital thermometer
DS2406 Single or Dual Addresable Switch
DS2408 8 channel PIO
DS2413 Dual-channel programmable I/O
DS2417 1-Wire Time Chip with Interrupt
DS2438 Smart Battery Monitor containing 10v A/D, 250mv A/D, thermometer, elapsed time counter
Two of the three 1-wire devices I had in my wind instruments circuit are discontinued and the third is not needed with +5v available at the mast top. I'm considering a complete change of design