All,

  I have searched the PICLIST archive and Microchip but no luck.

  The data sheet for the 16F684, and others, refers to the "High current 
source/sink for direct LED drive."
  They also specify, under Absolute Maximum ratings, 25mA per pin & 
200mA per port.
  But they also specify, under DC characteristics, Vol = 0.6v at 8.5mA.

  The way I am interpreting this is that the device will not be damaged 
at 25mA but the Vol could be very high and would/could be different from 
one device to the next.
  To guarantee a logic low (Vol <= 0.8) I need to keep the current down 
to 8.5mA.

  Thus if I want to sink the current from three LED's (current ~= 7mA 
each) I need to use three outputs or an external open-collector/drain 
transistor.
  Has anyone actually measured the Vol vs Iol?

  Am I reading this correctly?

  Thanks,
Phil



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