Lewis:

I believe that the current is somewhat less than 20mA if all of the I/O
pins are used as drivers.  But I could be wrong.  Been there before. You
might check the specs on the device you are using to see what the actual
useable total current is.
Richard



----------
> From: Lewis H. Cobb <cobb@ZEUS.EE.UNB.CA>
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Voltage Level On 16C620 or 16F84 Port Pins
> Date: Monday, May 25, 1998 7:27 PM
>
> Hello - I'm designing a small serial data based controller system and
have
> been considering the use of a PIC as it appears that the ports can be
used
> to power other peripherals as they can sink/source some 20mA (can't do
that
> with the old standby 8051 variants I'm used to).
>
> My question is this - what is the voltage level on a port pin that is set
> to "high" and is sourcing near it's  maximum current?  The data sheets in
> the microchip databook only show a Vdd-0.7 for a source current of -3mA.
I
> will be sourcing at least 10 mA and perhaps 15.
>
> Thanks for any assistance people can provide.
>
> Lewis
> cobb@zeus.ee.unb.ca