-horn-:
I ask, because I want to trigger it with a 1 pulse per second GPS chip with a +-10 nanoseconds jitter and it must trigger faster than 250 nano seconds and then pulling up a pin from low to high.
From what I can gather this signal is pulsing at the rate of one per second with a +-10 nanoseconds jitter. That means that the pulse can be 10 nanoseconds early or 10 nanoseconds late. Given that I am not sure what you want to do or why you want to do it.
it must trigger faster than 250 nano seconds and then pulling up a pin from low to high.
What and when does this pin go from a high to a low?