QuoteSo you don't need any more.Yes you do. 1mA is the maximum current that should flow through the internal protection diodes.
So you don't need any more.
(Assuming you've limited the number of amps that can reach the pin, eg. though a 10k resistor)
It's my page so yes I think it is good especially if you are only protecting against transients. If the voltage is going to be constantly over 5V then make that resistor something like 100R.
I don't have a 100pF can I use other values?