Series termination resistor for IMI9531 Spread Spectrum Clock Generator | Cypress

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Series termination resistor for IMI9531 Spread Spectrum Clock Generator

Last Updated: December 28, 2011
Question: 

What is the recommended series termination resistor for the output 133 MHz clock lines from the IMI9531 Spread Spectrum Clock Generator?

Answer: 

The best termination depends on the trace length and trace impedance and capacitance being driven . A nominal value would be between 22 and 33 ohm. Make sure there are not any vias in the trace within the middle 3rd of the trace.
 

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