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DS80PCI102: TI 'Repeater' vs 'Redriver'

Part Number: DS80PCI102
Other Parts Discussed in Thread: SN65LVPE501, DS125BR111,

Hi,

We were using TI SN65LVPE501, which the datasheet calls a Redriver.  We used it for PCIe Gen 2 over the -40C to 85C temp range.

We're now looking for a PCIe Gen 3 Redriver that operates over the same temp range.  However, all the SN* Gen3 Redriver series parts only go as low as 0C.

An agent recommended some alternate part numbers during a Help Chat session.  Two recommendations that might work for me are DS80PCI102 and DS125BR111.  However, the datasheet classifies these as 'Repeaters' (instead of 'Redrivers'), which is confusing me.

Are the DS series of parts acting as Retimers or Redrivers?  That is, are they doing anything with the underlying PCIe protocol as they amplify the PCIe signals?  Looking at the datasheet, I suspect the answer is no (particularly since the block diagrams show they have no clock and data recovery circuit).  However I would like confirmation of this, since we don't want to interfere with the PCIe protocol when amplifying the Gen 3 signals.

  • Hi Alberto,

    These devices you noted do not have integrated retimers. These parts mainly do signal conditioning meaning they reduce data dependent jitter caused by transmission media low pass filtering effects. These parts do not have retimers and they are seamless - signal goes through them and act like like analog buffers.

    DS80PCI102 or DS125BR111 are suitable for your application. The terms repeater and redrivers have been used interchangeably throughout different data sheet. 

    Regards,, Nasser