VSC7128

The VSC7128 contains six Port Bypass Circuits (PBCs), dual embedded Clock Recovery Unit repeaters (CRU) and dual Signal Detect Units (SDU). These functions are integrated into a single part to minimize circuit size, part count, cost, high frequency routing and jitter accumulation. Together, they allow for optimized designs of FC-AL JBOD systems that provide resiliency and hot insertion/removal of disk drives. The PBCs configure the FC-AL loop to either include or exclude each drive. Repeaters retime the incoming signal thereby attenuating jitter so that downstream devices see high amplitude, low jitter signals. The SDUs determine whether the output of the CRU is a valid Fibre Channel signal. Disk drives are connected directly to the LSO/LSI/SEL pins while the IN/OUT pins can be connected to any FC-AL devices.