On Fri, 2006-03-10 at 18:02 +0100, Jan-Erik Soderholm wrote:
> palam.c wrote :
> 
> > 150mA. Eventhough it is
> > lesser than specfied value, 150mA looks big for me.
> > IC is getting hot when running (First time i am encountering this
> > with a digital ic).
> 
> But doesn't it also have an *analog* ethernet line-driver ?

Yup, aside from the magnetics and termination the whole Ethernet PHY is
inside the chip. Being ethernet you gotta think the IO drivers are
rather beefy. Beefy analog = power. Remember kids that analog CAN
consume good amount of power for relatively simply functions.

> I'd guess it's the driving of the ethernet line that
> draws the power.

No idea, it is a 25MHz chip doing alot of stuff, but I'd agree the
analog portions of the PHY are a major consumer of the power budget. 

TTYL

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