SI5317C-C-GMR Silicon Laboratories Inc, SI5317C-C-GMR Datasheet - Page 33

• Manufacturer Part Number: SI5317C-C-GMR
• Manufacturer: Silicon Laboratories Inc

Specifications of SI5317C-C-GMR

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Si5317
5.1.4. Reference Clock Frequency
Based on the application and desired output frequency, care should be exercised in selecting the frequency on the
reference used for XA/XB. When the CKOUT operating frequency is close to having a simple integer relationship,
significant spurs can occur. For example, compare the spurs when the CKOUT operating frequency is 622.08 MHz
with a reference of 114.285 MHz (see Figure 21) versus a reference frequency of 38.88 MHz, which is 16 times the
XA/XB reference (see Figure 18).
Figure 18. Effect of Reference Frequency on Spurs
Rev. 1.0
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