Trace Spacing

When planning your board's signal traces, maintain the correct spacing between traces. The minimum trace width for all DDR signals is 5 mils.

  • 3H spacing between any data and address/command traces, where H is the distance to the nearest return path.
  • 5H spacing between memory clock and any other signals, where H is the distance to the nearest return path.
Figure 1. Trace Spacing Guidelines