Issue link: https://resources.pcb.cadence.com/i/1544351
5. Set values for Min Width, Max Width, Min Space, and Max Space (shown above). Top View of Differential Pair Differential pairs have many parameters to consider. f Line Width (Min, Max) - The trace width for a single diff pair trace not in Neck Mode. Min is the thinnest the trace is allowed to be, and Max is the thickest the trace is allowed to be. f Neck - When in Neck Mode (narrower traces) ɢ Min Width – the thinnest that a single-ended trace of the diff pair can be ɢ Max Length - the longest distance allowed for diff pairs to be in neck mode before going into regular diff pair mode f Uncoupled Length - When diff pairs are not close enough to each other to be electrically coupled, i.e., separated ɢ Gather control - During the time diff pairs are uncoupled to connect to or from pads, you can ignore or include the distance where diff pairs momentarily separated ɢ Max - the maximum distance you will allow diff pair traces to be uncoupled for f Static Phase Tolerance – a high-speed timing-related constraint that determines the allowed skew in timing between the two differential signals arriving at the receiver simultaneously. f Dynamic Phase - high-speed timing and EMC-related constraint that determines the amount of common mode voltage and signal attenuation allowed at any distance along the trace path before reaching the receiver pins ɢ Max Length - maximum time of flight to allow signals to propagate out of phase ɢ Tolerance - some +/- margin for signals to be out of sync 10 www.cadence.com OrCAD X Constraint Management Guide