Jon, this is a Good Thing. IMHO, noise on quiescent outputs is a
lost cause. It's like Xline interconnect or near-end crosstalk
among bus lines: you AIN'T gonna get rid of it so you might as
well learn to make the best of the situation. Quiescent outputs
being (effectively) shorted to a rail, or at least a line at rail
potential, means that the active lines have one more dump for their
switching noise.
What causes ME to sweat nights is the fact that SSO causes driver
starvation. For the last couple of years it's the largest single
term in our clock-to-output timing.
-- D. C. Sessions [email protected]