IPC 2251:2003

This guideline addresses the major factors influencing the design of high-speed circuitry. Considerations include electrical noise, electromagnetic interference, signal propagation time, impedance, thermo-mechanical environmental protection, and heat dissipation. Supersedes IPC-D-317A. Key improvements over the IPC-D-317A document include updated impedance models for embedded microstrip, centered stripline and dual stripline geometries, expanded EMI layout practices, signal integrity design constraints, enhanced graphics and updated terms and definitions.