1) Accuracy over T and V, +/- 2% with internal osc, xtal of course << .1%
2) Operation into years of delay, PW
3) 4+ decade adjust-ability
4) Qualified triggers, like V, T, PW, Light, Logic, all easily implemented
5) External RC timing accuracy issues and drift eliminated
6) Multiple synch pulses can be generated off one trigger with their
own timing
7) One chip.