I do not know if 50m is achievable by I2C.
Check the datasheet of an 82B715.
This is an I2C driver which has low Z outputs and can
drive quite some current.

grtz

Simon




 --- Sean Alcorn - Avion Sydney
<sdalcorn@AVION.COM.AU> wrote: > Hi everybody,
>
> I am a relative newbie, and am designing a series of
> products based on the
> PIC16F87X and possibly the PIC16F628 that will all
> need to communicate with
> each other (multi Master) over distances of up to
> say 50m.
>
> Is I2C a suitable choice? Can I run the PICs as slow
> as 4MHz, or would I
> need to go higher than this? I plan to send simple
> commands and
> acknowledgements only.
>
> Also what is a "Controller Area Network"
>
> Sorry if these are silly questions.
>
> Regards,
>
> Sean
>
> --
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>
>

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