On Mon, 4 Aug 2003, Mike Singer wrote:

> I wrote:
> > Another case:
> > Battery operated PIC (low power consumption, variable
> > Vdd, sleep mode) to control an external device sinking,
> > say, 20 mA.
>
> Sorry, not "sinking" but "sourcing":
>
> "...an external device _sourcing_, say, 20 mA."
>
> Open drain should sink current.
>

  Are you positive sure ? I think an open drain could also sink current...
No one say that PIC can't be supplied with Vdd = 0V and GND = -5V.
So, in respect to the human convention of standardize everything, then
sourcing and sinking are just some words related to ground, which can be
any...

best regards,
Vasile

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