PCIe® 5.0, 32-Gbps, 8-channel linear redriver with four 2x2 crosspoint multiplexers

The DS320PR 822

is a low-power high-performance linear

repeater or redriver designed to support PCIe 5.0, CXL 2.0, UPI 2.0, and other

interfaces up to 32 Gbps. The DS320PR 822 provides four 2x2 cross-point mux

functionality.

The DS320PR 822

receivers deploy continuous time linear equalizers (CTLE) to provide a programmable

high-frequency boost. The equalizer can open an input eye that is completely closed

due to inter-symbol interference (ISI) induced by an interconnect medium, such as

PCB traces. The CTLE receiver is followed by a linear output driver. The linear

data-paths of DS320PR 822 preserve transmit preset signal

characteristics. The linear redriver becomes part of the passive channel that as a

whole get link trained for best transmit and receive equalization settings. This

transparency in the link training protocol results in best electrical link and

lowest possible latency. Low channel-channel cross-talk, low additive jitter and

excellent return loss makes the device almost a passive element in the link, but

with its useful equalization. The data-path of the device uses an internally

regulated power rail that provides high immunity to any supply noise on the

board.

The device also has low AC and DC gain variation providing consistent

equalization in high volume platform deployment.