We will be coming out with a replacement for our Hub. It is in the design stage. There are a few other things that have to get completed before it gets much attention but it is a high priority.

Eric
www.hobbyboards.com

On 1/25/2012 12:36 PM, Mark Richards wrote:
On 1/25/2012 13:24, p4trykx wrote:
Dnia 25-01-2012 o 19:11:08 Roberto Spadim <robe...@spadim.com.br>  
napisał(a):

well, i don´t think we will have another solution instead of with more
bus masters instead of more hubs
In a discussion on Maxim site, someone mentions a substitute made from  
other components
http://www.maxim-ic.com/datasheet/index.mvp/id/2909/t/uc

"As far as the application note describing the replacement...  It's not  
really worth waiting for, I've seen the preliminary version.  It basically  
uses a DS2408, two resistors, a DS1811, and two unspecified analog  
switching chips; and then they add insult to injury by pointing out that  
the builtin ESD protection of the 2409 has not been covered yet and needs  
to be taken care of by separate components."
Maxim's circuit was an attempt to maintain compatibility with the one wire command set.  I took a look and it seemed not worth the trouble.

A much better analog switch could be used for this function and would lend itself to more than 2 channels.  Perhaps some consideration might be given to owfs supporting a custom command for a new/proposed hardware device that would implement a hub?  If this is possible, I could work up something on the bench, although it would undoubtedly be more costly than using the now gone 2409.  And if this can work, maybe a multi-channel 32 bit counter is another opportunity?

/m



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