I'm doing a fast thing and thought I might go all CMOS, instead of traditional expensive ECL. We have the Fairchild NC7SV74 tiny logic flipflop in stock, 16 cents each. I thought I'd play with one.
Here are the rise and fall times at the Q output, 3.3 volt supply:
That fall time is amazing, but the rise time is hard to believe. I can't see that I'm doing anything wrong.
The clock rise to Q rise prop delay is 0.8 ns. Its temperature coefficient was hard to measure, but it looks like maybe +0.7 ps per degree C. Vcc delay coefficient is so close to zero that it doesn't matter.