Question: If S2=1 and S1=0, then as per the datasheet, the output source is reference instead of PLL. What will the propagation delay be in this case?
When the CY2308 is configured with S2=1 and S1=0, the device will go into buffer mode. The input will travel through some circuitry and then to the output. The delay is on the order of 3ns - 8ns.