Traditional Digital PCB vs. High-Speed PCB(High-Speed PCB)
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| Feature | High-Speed Digital PCB | Traditional Digital PCB |
| Data Rate / Edge Speed | Multi-Gbps serial links, sub-nanosecond edge rates | ≤ hundreds of MHz, moderate edge rates |
| Design Focus | Transmission-line behavior, eye diagrams, jitter, BER | Connectivity and basic timing |
| Impedance Control | Systematic, board-wide impedance control (single-ended & diff) | Best-effort or limited nets only |
| Stackup & Vias | Engineered stackups, HDI, via-in-pad, back-drilling | Simple FR-4 stackups, through-hole vias |
| Material Requirements | Enhanced FR-4 / low-loss laminates tuned for high-speed use | Standard FR-4, modest Dk/Df constraints |
| Typical Applications | Servers, AI accelerators, high-speed networking, advanced ECUs | General digital, low/medium-speed control |
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