Advantech EVA-X4300 User Manual page 9

Fully static 32-bit x86-based processor
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For 4-layer:
Ball pad diameter: 14 mil
!
Traces width/ spacing for Signals: 5/ 5 mil
!
!
Trace width for Power and Ground: 20 mils
!
Vias PAD/ Drill diameter for all Signals: 22/ 12 mil
!
Via-to-via spacing (center to center): 40 mil
!
Via-to-pad spacing (center to center): 30 mil
Note!
All the Vias must be covered by solder mask. To minimize inductance,
power vias should be as large as possible and take good care of the
inadvertently cut of the ground and power planes.
5
EVA-X4300 System Design Guide

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