DS160PR412: Length limitation

Hi Zoe,

There is no specific wire length limitation. Different traces and cables have different properties and insertion losses, so we cannot guarantee any length limitation. Please look at table 7-1 of the datasheet for approximate insertion losses the redriver can compensate for. The PCIe spec states that a system can function with up to 28dB of insertion loss at Gen4, so as long as the insertion loss of the complete signal path is less than 28dB + the compensation of the redriver, then the link should be stable. We recommend performing IBIS modelling to ensure this.

Thanks,

David