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.

The SD Association (SDA) recently announced SD Express, which adds the PCI Express^® and NVMe™ interfaces to the SD interface. The PCIe^® interface delivers transfer rates up to 985 megabytes per second (MB/s) and supports backward compatibility with existing SD hosts.