GD82559 Intel, GD82559 Datasheet - Page 20

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GD82559

Manufacturer Part Number
GD82559
Description
Manufacturer
Intel
Datasheet

Specifications of GD82559

Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (min)
3V
Operating Supply Voltage (max)
3.6V
Operating Temperature Classification
Industrial
Mounting
Through Hole
Lead Free Status / Rohs Status
Not Compliant

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Intel-Based Electronic Classroom Student Computing Station
Figure 4.
Figure 5.
20
Placement of Termination Resistor
The key factors in controlling trace EMI radiation are the trace length and the ratio of trace-width
to trace-height above the ground plane. To minimize trace inductance, high-speed signals, such as
the clock, and signal layers that are close to a ground plane or power plane should be as short and
as wide as is practical. As shown in
To maintain the impedance of a trace, the width of the trace should be modified when changing
from one board layer to another if the two layers are not equidistant from a power or ground plane.
Trace Geometry
NOTE: W= Trace Width, H= Height Above Ground Plane
as close to the 82559 as possible.
Place termination resistors
82559
H
Figure
R
R
W
5, this ratio is ideally somewhere between 1:1 and 3:1.
Magnetics
Module
Ground
1 <
W
H
< 3
Application Note
RJ-45
A7495-01
A7496-01

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