Well, hello!

  I have been searching on the net and I could not resolve my doubt...It
is about how to calculate Rmax and Rmin for a pull-up. Well, yes, I know
that if i use a 10K resistance it would work fine... but let's do some
numbers...

We have a PIC, and one output with open-colector and two devices
connected to this pin. Let's take CMOS values: Voh=4,6V Vol=0,4V
Vih=3,5V Vil=1,5V || Iil= -1uA Iih=1uA Ioh=-360uA Iol=0,36mA || VCC =5V

Well, I have been thinking on how to calculate Rmax and Rmin for a
pull-up resistance.

Please tell me if this is right...
   Rmax = (VCC-Voh)/(Ioh*number of devices)
   Rmin = Vol/Iol ; I take maximum Iol from all devices..
is it correct ?

Thanks !

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