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DS110 device for PCIe cabeling.

Other Parts Discussed in Thread: DS80PCI800, DS80PCI402, DS80PCI102

Hello,

can you recommend the DS110 retimer ic for PCIe purpose (5GBit) or do you know a other one which is better solution for this setup.

Problem: PCIe Gen 2 extern cabeling. Which cable length i can expect? (Without taking the cable quality into account).

 

Thanks.

Regards.

  • Hi Franz,

    We do not recommend any retimer solutions for PCIe purposes. Though the DS110DFxxx retimers are able to operate at the 5 Gbps operating rate and there is no Tx FIR link training coefficient protocol for PCIe Gen 2, there is still a "maximum transition to valid differential signaling after leaving Electrical Idle" specification in the PCIe transmitter, and this maximum according to PCIe standards is 8 ns. The DS110DFxxx retimers require several ms to achieve CDR lock before a valid signal can be output. For this reason, the retimers currently in TI's portfolio are typically used for Ethernet-based standards and not PCIe.

    For PCIe, we recommend PCIe specific repeaters from our portfolio. Since you are operating at Gen-2, a good place to start is the DS80PCI102, DS80PCI402, and DS80PCI800.

    Regarding external cabling, it is more important to know the attenuation loss and quality of the cable rather than the physical length. Nevertheless, as stated in the datasheet, these repeaters can recover losses at 8 Gbps on 30-AWG PCIe cables with lengths up to 10m-12m.

    Thanks,

    Michael

  • Hi Michael,

    is there a PCB-Symbol for Altium Designer available (For the  DS80PCI102).

     

    Thanks.

    Regards.

  • Hi Franz,

    Yes, we do have one available. Could you send me an e-mail (m-lu@ti.com) so that I can attach the model files in a separate message to you offline?

    Thanks,

    Michael