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CDCM9102: PCIE clock buffer

Part Number: CDCM9102

HI Sir 

Do I need to add below external component for PCIE clock buffer for Thunderbolt application ?

Thanks

  • Hello Kai,

    that suggestion originates in the activation of OSCout output of CDCM9102.

    OSCout can only be activated in combination with LVPECL. In the simplified schematic we want to show HCSL format. Therefore this solution shows a passive termination scheme for LVPECL to HCSL format conversion.

    (So practically for the example in the simplified schematic CDCUN1208 could use LVDS input and CDCM9102 LVDS output and just a 100 Ohm differential termination.)

    Which signal format does your PLL input support?

    When your receiver needs HCSL, you have to place the components as shown.

    Best regards,

    Patrick