A circuit arrangement, program product and method in one aspect utilize three stage input staging logic to receive source synchronous data in a source synchronous communications system such as a PCI-compatible communication system. A controller includes a low-speed communication IF and a high-speed communication IF. Physical symmetry and rounded layout provide uniform current and thermal distribution as well as symmetrical electrical operation characteristics. If the control voltage is less than a voltage minimum and the frequency is not below a frequency minimum, the VCO sensitivity is decreased. The result is a dielectric film having a high degree of crystallographic alignment at grain boundaries of the film.