SLLA682 July   2025 TDP142

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Device Configuration
  6. 3Equalization Selection
  7. 4Equalization Selection Example
  8. 5AUXP/N and SNOOPENZ Configuration
  9. 6Layout Guidelines
    1. 6.1 GND Stitching
    2. 6.2 AC-Coupling Capacitors
    3. 6.3 Layout Example
  10. 7Summary
  11. 8References

6.1 GND Stitching

The entirety of any high-speed signal trace needs to maintain the same GND reference plane from origination to termination. If the same GND reference plane is not maintained, via-stitch both GND planes together to make sure continuous grounding and uniform impedance. Place these stitching vias symmetrically within 200mils (Center-to-center, closer is better) of the signal transition vias. See Figure 6-3 for an example of GND stitching vias.

GND Stitching Vias Example Figure 6-3 GND Stitching Vias Example