Intel Pentium 4 User Manual

I/O Controller Hub 2
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Intel
®
Pentium
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4 Processor / Intel
®
850 Chipset Family Platform Design Guide 169
9.9.2.2 Power and Ground Connections
Some rules and guidelines to follow for power and ground connections:
• All VCC pins should be connected to the same power supply.
• All VSS pins should be connected to the same ground plane.
• Use one decoupling capacitor per power pin for optimized performance.
• Place decoupling as close as possible to power pins.
9.9.2.2.1 General Power and Ground Plane Considerations
To properly implement the common mode choke functionality of the magnetics module the chassis
or output ground (secondary side of transformer) should be separated from the digital or input
ground (primary side) by a physical separation of 100 mils minimum.
Figure 122. Ground Plane Separation
Magnetics Module
0.10 inches minimum separation
Separate Chassis Ground Plane
Ground Plane
Ground_Plane_Separation
Good grounding requires minimizing inductance levels in the interconnections and keeping ground
returns short, signal loop areas small, and power inputs bypassed to signal return, will significantly
reduce EMI radiation.

Intel Pentium 4 Specifications

General

Brand	Intel
Model	Pentium 4
Category	Computer Hardware
Language	English