AN851 Datasheet, PDF (5/25 Pages) Silicon Laboratories – Si468X SCHEMATICS AND LAYOUT GUIDE

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AN851
Figure 2. Si468x QFN Layout Design with Legend
Figure 2 shows Si468x layout with all 4 layers and crystal support. All bypass components are placed around the
silicon as close as possible. A few things to note:
The lowest value capacitor (8.2 pF) shall be placed the closest to the chip.
Crystal and Audio traces shall be short in length and the recommended trace width is 6 mils.
To minimize the loop area, all return currents shall be returned to its source as compactly as possible.
Rev. 0.2
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