Power-Saver Equalizers Enhance Data Transmission Reach of FR-4 Backplanes
The DS38EP100 power-saver equalizer from National Semiconductor can equalize 40" of FR-4 printed circuit board (PCB) at a data transmission rate of 3.125 Gbps. National’s DS38EP100 and DS80EP100 require no power or ground routing, and they accept any high-speed differential signal technology including current-mode logic (CML), low-voltage differential signaling (LVDS) and low-voltage positive emitter coupled logic (LVPECL). Additionally, they are bi-directional, offering the same equalization gain in either direction. The equalizers are suited for many applications such as routers, storage subsystems and wireless base stations. The DS38EP100 operates from 1 Gbps to 5 Gbps, while the DS80EP100 operates from 5 Gbps to 10 Gbps. They address a variety of systems using high-definition multimedia interface (HDMI) or digital visual interface (DVI) interface standards, as well as systems using a PCI Express or XAUI interface. With no power or ground required, system designers can place these power-saver equalizers in cables, connectors or backplanes, and they can add them to a board with a minimum of layout changes.