SI5346-EVB Datasheet, PDF (7/20 Pages) Silicon Laboratories – Powered from USB port or external power supply

Si5346-EVB
8. External Reference Clock Input Circuit (XA/XB)
The Si5346 EVB supports either XTAL or external reference clock on XA/XB. By default, the XTAL is populated. If
a reference clock is required for testing, remove Y1 and place C93/C94. A low-jitter reference clock can then be
applied to J25/J26. Note that XA/XB is the jitter reference for the device. Jitter performance at the output of the
Si5346 will depend on the jitter performance of the reference clock at XA/XB.
Figure 6. External Reference Clock Termination Circuit
Rev. 1.0
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