Has anybody seen an I2C termination like this with a capacitor in series with the pull-up resistor? I've seen this on differential bus terminations to prevent reflections and the cap is there to reduce power consumption...but seeing as how in I2C and these are suppoed to be for pull-up it doesnt seem to make sense. Wouldn't it limit the slew rate?
Has anybody seen an I2C termination like this with a capacitor in series with the pull-up resistor? I've seen this on differential bus terminations to prevent reflections and the cap is there to reduce power consumption...but seeing as how in I2C and these are suppoed to be for pull-up it doesnt seem to make sense. Wouldn't it limit the slew rate?
You're missing the point! - they aren't CAPACITORS they are CAPACITANCE, they represent the stray capacitance of the boad layout, and are essentially what the pullup resistors have to overcome - which is why they can't be too high a value. The diagram itself only shows them to explain the formulas that (presumably?) follow.