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单端时钟输入CDCLVD1204,无输出

Other Parts Discussed in Thread: CDCLVD1204

您好:

  我用一个输出为2.5VLVCMOS的晶振给CDCLVD1204提供输入,并按照1.25V给VTH提供外部偏置,但是CDCLVD1204各输出管脚都是2.0V的高电平,没有LVDS输出,这是为什么? 

补充情况:我用示波器观察过晶振的输出,有一定的过冲和下冲,过冲峰值超过了2.8V,下冲则低于0.3V。