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LMK1C1108: Problem: No output from chip ouput pins

Part Number: LMK1C1108

Tool/software:

As shown in Figure 1,

connect the output of the OCXO(Oven Controlled Crystal Oscillator) to the CLK-IN pin of LMK1C1108.

The 3.3V power supply is normal, and the Pin2 pin (1G) of LMK1C1108 is supplied with a high level.

The clock signal output by the OCXO is measured with an oscilloscope as shown in Figure 2 (pk-pk value is about 2.8V),

but there is no signal on the 8 output pins Y0-Y7 of LMK1C1108 measured with an oscilloscope.

What is the reason?

Thanks!