82575 Ethernet Controller Design Guide

where the traces enter or exit the magnetics, the RJ-45 connector, and the Ethernet silicon.

6.Use of a low-quality magnetics module.

7.Re-use of an out-of-date physical layer schematic in a Ethernet silicon design. The terminations and decoupling can be different from one PHY to another.

8.Incorrect differential trace impedances. It is important to have ~100 W impedance between the two traces within a differential pair. This becomes even more important as the differential traces become longer. To calculate differential impedance, many impedance calculators only multiply the single-ended impedance by two. This does not take into account edge-to-edge capacitive coupling between the two traces. When the two traces within a differential pair are kept close to each other, the edge coupling can lower the effective differential impedance by 5 W to 20 W. Short traces will have fewer problems if the differential impedance is slightly off target.

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Intel 317698-001 manual Ethernet Controller Design Guide

317698-001 specifications

The Intel 317698-001 is a prominent and highly regarded component in the realm of computer hardware. This product is part of Intel's extensive portfolio, designed primarily for enhancing computing performance, efficiency, and reliability. It is typically associated with server motherboards and is known for its robust architecture, making it ideal for enterprise-level applications.

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