RE: Re: Interfacing With Ethernet

["Ian Lowe" <ian@xxxxxxxxxxxxxxxxxx>]

-----Original Message-----
From: ian.bird@xxxxxxx
>
>I don't know whether Ian et al have thought of this but it could be a
false >economy as a spike on the network may toast your new creation.
Ironically >the component I am using to do this only costs about 3 quid
but is quite >big (DIL14) and needs some more capacitors (6 of, 3 of
which are 1KV for >spike protection). Minimal cost implications but
quite a lot of PCB area >needed.

Yeah, duly considered and implemented. It's the key reason for using the
newer RJ45s with integrated magnetics - these guys actually provide
*much* higher isolation than the separate PHY/MAC solutions that were
used on older Ethernet boards..

The 10Mb NE2000s all used separate isolation blocks - all of the current
PCI designs that I have seen use integrated blocks.

So, don't worry, no Kilovolt surprises on my board design ;)

Ian.



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