Pericom's PI6C557 PCIe 2.0 clock generator (spread spectrum clock generator) meets PCI Express 2.0 and Ethernet requirements. PI6C557 devices are used in PC or embedded systems to greatly reduce electromagnetic interference (EMI). PI6C557-03AQ provides two differential (HCSL) or LVDS spread spectrum outputs. PI6C557-05Q provides four differential (HCSL) or LVDS spread spectrum outputs.