请简述时钟芯片Si5375的VCO Freeze模式原理及应用场景，VCO Freeze模式是否适合SDH的应用？

Any Frequency Precision Clock Multiplier/Jitter Attenuator,8 Inputs, 8 Outputs (2 kHz to 808 MHz)

Quad DSPLL jitter attenuating clock,Standard loop bandwidth (60 Hz to 8.4 kHz)8 input, 8 output (2 kHz to 808 MHz)

4-PLL ANY-FREQUENCY PRECISION CLOCK MULTIPLIER/JITTER ATTENUATOR

评估板

4-PLL ANY-FREQUENCY PRECISION CLOCKMULTIPLIER/JITTER ATTENUATOR. SI5376评估板

Quad DSPLL jitter attenuating clock,Standard loop bandwidth (60 Hz to 8.4 kHz)