82574L データシートの表示（PDF） - Intel
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82574L Datasheet PDF : 472 Pages
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82574 GbE Controller—Datasheet
13.5.5 Layout Considerations for the Ethernet Interface....................................... 431
13.5.6 Physical Layer Conformance Testing ........................................................ 437
13.5.7 Troubleshooting Common Physical Layout Issues ...................................... 437
13.6 SMBus and NC-SI ............................................................................................ 438
13.6.1 NC-SI Electrical Interface Requirements................................................... 439
13.7 82574 Power Supplies ...................................................................................... 443
13.7.1 82574 GbE Controller Power Sequencing.................................................. 443
13.7.2 Power and Ground Planes ...................................................................... 445
13.8 Device Disable................................................................................................. 445
13.8.1 BIOS Handling of Device Disable ............................................................. 446
13.9 82574 Exposed Pad* ........................................................................................ 446
13.9.1 Introduction ......................................................................................... 446
13.9.2 Component Pad, Solder Mask and Solder Paste ......................................... 447
13.9.3 Landing Pattern A (No Via In Pad) ........................................................... 448
13.9.4 Landing Pattern B (Thermal Relief; No Via In Pad)..................................... 449
13.10 XOR Testing .................................................................................................... 450
14.0 Thermal Design Considerations.............................................................................. 452
14.1 Introduction .................................................................................................... 452
14.2 Intended Audience ........................................................................................... 452
14.3 Measuring the Thermal Conditions ..................................................................... 452
14.4 Thermal Considerations .................................................................................... 452
14.5 Packaging Terminology ..................................................................................... 453
14.6 Product Package Thermal Specification ............................................................... 453
14.7 Thermal Specifications...................................................................................... 454
14.7.1 Case Temperature ................................................................................ 454
14.7.2 Designing for Thermal Performance......................................................... 454
14.8 Thermal Attributes ........................................................................................... 455
14.8.1 Typical System Definitions ..................................................................... 455
14.9 82574 Package Thermal Characteristics .............................................................. 456
14.10 Reliability ....................................................................................................... 456
14.11 Measurements for Thermal Specifications............................................................ 457
14.12 Case Temperature Measurements ...................................................................... 457
14.12.1Attaching the Thermocouple................................................................... 458
14.13 Conclusion ...................................................................................................... 458
14.14 PCB Guidelines ................................................................................................ 459
15.0 Board Layout and Schematic Checklists ................................................................. 460
16.0 Models ................................................................................................................... 470
17.0 Reference Schematics ............................................................................................ 472
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