SPRAAR7J November   2018  – February 2023 66AK2G12 , AM1806 , AM1808 , AM2431 , AM2432 , AM2434 , AM3351 , AM3352 , AM3354 , AM3356 , AM3357 , AM3358 , AM3358-EP , AM3359 , AM3871 , AM3874 , AM3892 , AM3894 , AM4376 , AM4377 , AM4378 , AM4379 , AM5706 , AM5708 , AM5716 , AM5718 , AM5726 , AM5728 , AM5729 , AM5746 , AM5748 , AM5749 , AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP , AM62A3 , AM62A3-Q1 , AM62A7 , AM62A7-Q1 , AM62P , AM62P-Q1 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442 , AM6526 , AM6528 , AM6546 , AM6548 , BQ24392-Q1 , HD3SS6126 , LP8727 , OMAP-L137 , OMAP5912 , TMS320C6745 , TMS320DM335 , TMS320DM355 , TMS320DM365 , TMS320DM368 , TMS320DM369 , TMS320DM6441 , TMS320DM6443 , TMS320DM6446 , TMS320DM6467 , TMS320DM8127 , TMS320DM8147 , TMS320DM8148 , TMS320DM8165 , TMS320DM8167 , TMS320DM8168 , TMS320VC5506 , TMS320VC5507 , TMS320VC5509A , TS3USB221A-Q1 , TS3USBA225 , TSU5511 , TSU5611 , TSU6111 , TSU6111A , TSU6721 , TSU8111

1.   Abstract
2.   Trademarks
3. 1Introduction
   1. 1.1 Scope
   2. 1.2 Critical Signals
4. 2General High-Speed Signal Routing
   1. 2.1 PCB Fiber Weave Mitigation
   2. 2.2 High-Speed Signal Trace Lengths
   3. 2.3 High-Speed Signal Trace Length Matching
   4. 2.4 High-Speed Signal Reference Planes
5. 3High-Speed Differential Signal Routing
   1. 3.1  Differential Signal Spacing
   2. 3.2  High-Speed Differential Signal Rules
   3. 3.3  Symmetry in the Differential Pairs
   4. 3.4  Crosstalk Between the Differential Signal Pairs
   5. 3.5  Connectors and Receptacles
   6. 3.6  Via Discontinuity Mitigation
   7. 3.7  Back-Drill Stubs
   8. 3.8  Increase Via Anti-Pad Diameter
   9. 3.9  Equalize Via Count
   10. 3.10 Surface-Mount Device Pad Discontinuity Mitigation
   11. 3.11 Signal Bending
   12. 3.12 Suggested PCB Stackups
   13. 3.13 ESD/EMI Considerations
   14. 3.14 ESD/EMI Layout Rules
6. 4References
7.   A Device Layout Parameters
8.   Revision History