i'm not 100% sure of the purpose of this but, is this input pulse will also be used for something else too??? if not why not just using an RC circuit with a voltage comparator, op-amp, FET, MOSFET or else to do the job? OR an OLD NE555 as monostable??


Also you can use interrupt to generate your pulse with PAUSEUS or PULSOUT. Depending of what else the PIC is doing, it could work really well.

It's possible that i don't understand... if so, just tell me.