Other Parts Discussed in Thread: LMK05028
in our application dedicated to digital audio, we need to generate a clean master clock at 24.576MHz with a crystal. We have also the need to syncronize the generated clock with an external source at the same frequency. We need to syncronize the internal generated clock only if the external clock frequency is within +- 100ppm.
For this application we see the LMK0431, our need is to have at the output a 24.576MHz clock signal uninterrupted also if the external source is present or not or during transition between on or off.
Another task is the stability of the output frequency if the external signal frequency is outside the lock range of the pll1, for example if the external frequency is 24.000 MHz. What happens in this condition? The output frequency is stable or pll1 is moving trying to lock to a reference out of the lock range?