0 Replies Latest reply on Mar 17, 2016 6:21 AM by falco_arvoo

    Differential pairs exiting/entering IC's

    falco_arvoo

      Hello,

       

      I'm routing all kinds of different differential pairs (ethernet, PCIe, SATA, HDMI) but somehow I can't seem to let them normally enter or exit an IC.

      I think this is due to the differential separation required, which differs per IC pitch.

      For example, on top/bottom layers I use 0.18mm traces with 0.13mm gap to achieve 100R diff impedance, but the pins on which they need to connect are 1mm separated.

      I tried playing with the constraint manager editing separation distance, distance to convergence and convergence tolerance, but nothing seems to solve it. Whenever I try to put a trace it says 'Multi plow failed'.

       

      Anyone have any idea how to solve this?