Xilinx RocketIO User Manual page 111

PCB Design Requirements
the package, so it is necessary to have both capacitors and ferrite beads mounted on the PCB.
Figure 3-10
and VTRX supplies.
ferrite beads of the AVCCAUXTX and AVCCAUXRX supplies. The ferrite beads are mounted at
the eight "L[n]" locations; the capacitors are mounted at the eight "C[n]" locations.
RocketIO™ Transceiver User Guide
UG024 (v2.3.2) June 24, 2004
shows the top PCB layer, with lands for the capacitors and ferrite beads of the VTTX
Figure 3-11
Figure 3-10: Example Power Filtering PCB Layout for Four MGTs, In Device with
www.xilinx.com
1-800-255-7778
shows the bottom PCB layer, with lands for the capacitors and
External Capacitors, Top Layer
R
111