JAJST56D October 2001 – February 2024 TFP410
PRODUCTION DATA
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Trace impedance should be controlled for optimal performance. Each differential pair should be equal in length and symmetrical and should have equal impedance to ground with a trace separation of 2 times to 4 times the height. A differential trace separation of 4 times the height yields about 6% cross-talk (6% effect on impedance).
We recommend that differential trace routing should be side-by-side, though it is not important that the differential traces be tightly coupled together, because tight coupling is not achievable on PCB traces. Typical ratios on PCBs are only 20% to 50%; 99.9% is the value of a well balanced twisted pair cable. Each differential trace should be as short as possible (< 2 inches is preferable) with no 90° angles. These high-speed transmission traces should be on layer 1, which is the top layer.
RxC-, RxC+, Rx0-, Rx0+, Rx1-, Rx1+, Rx2-, Rx2+ signals all route directly from the DVI connector pins to the device, no external components are needed.