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I would provide schematics. However I dont want others to monetize my design.
Ballast to the clock buffer is mostly power filtering.
Also I could provide Eagle .lbr for
IDT-9DBL02 (proven)
and IDT-9DBL04
and some other stuff.
Please let me know what your intended designs are, and the aprox. amount of units produced.
I would then decide if I want to share my design, and to what price.