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X1 and X2 clock multiplier outputs of CY7B994V with no reference | Cypress Semiconductors

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X1 and X2 clock multiplier outputs of CY7B994V with no reference

Last Updated: September 11, 2011
Question: 

What frequencies can be expected at the X1 and X2 clock multiplier outputs in CY7B994V Clock part in the absence of any reference clock?

Answer: 
In the absence of a reference clock, the PLL is expected to lock to the zero frequency input. It will therefore run at a frequency below the specified range for the device, but still in the MHz range. For example, if FS = Low, fNOM will probably be somewhere in the range of 1 MHz to 20 MHz. It may have much higher jitter than when it is operating normally.

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