What is pci express root complex driver3/17/2024 ![]() Figure 1 illustrates a typical redriver block diagram.Ī retimer is a mixed signal analog/digital device that is protocol-aware and has the ability to fully recover the data, extract the embedded clock and retransmit a fresh copy of the data using a clean clock. In addition, redrivers often have input loss-of-signal threshold and output receiver (Rx) detection capability. A redriver’s data path typically includes a continuous time linear equalizer (CTLE), a wideband gain stage and a linear driver. Now that the PCIe® 4.0 specification is ramping up and the PCIe 5.0 specification is also released, how do these reach extension tools stack up in the face of new challenges in high-speed connectivity?Ī redriver is a mostly analog reach extension device designed to boost the high-frequency portions of a signal to counteract the frequency-dependent attenuation caused by the interconnect: the central processing unit (CPU) package, system board, connectors and so on. Retimers and redrivers have enabled longer physical channels in servers and storage systems since Peripheral Component Interface Express (PCIe®) 3.0 specification was first introduced almost 10 years ago.
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