How to do PCB Trace Length Matching vs. Frequency
If you read many PCB design guidelines, particularly on parallel protocols and differential pair routing, you’ll see many mentions of trace length matching. When you need to do trace length matching in PCB design, your goal is to minimize timing differences between traces in a length-matching differential pair in a serial protocol, multiple traces in a parallel protocol (e.g., DDR data lines), multiple traces/pairs in a parallel protocol, or any...