Customer Reference Board

The IQ31154 CRB is implemented on eight layers. These layers are detailed in Table 22. This example is provided as a reference; each individual 31154 application may vary.

Table 22.

Customer Reference Board Stackup

 

 

 

 

Layers

Signal

 

 

 

 

Top layer

Signal layer—critical nets (clocks, S/P AD buses)

 

 

 

 

2nd layer

Ground plane

 

 

 

 

3rd layer

Signal layer

 

 

 

 

4th layer

Power plane—(split voltage plane 3.3 and 1.3 for I/O and core)

 

 

 

 

5th layer

Power plane—(also a split voltage plane 5 and 12 V)

 

 

 

 

6th layer

Signal—(some minor 25 mil wide power runs included)

 

 

 

 

7th layer

Ground plane

 

 

 

 

8th layer

Signal layer (critical nets)

 

 

 

FR-4, 0.062 in. ± 0.008, 1.0 oz. copper power/GND; ½ oz. copper signal.

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Intel® 31154 133 MHz PCI Bridge Design Guide Design Guide

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Intel 31154 manual Customer Reference Board Stackup, Signal