Multipoint Low-Voltage Emulated (MLVDSE25) Output Mode

MLVDS has larger signaling amplitude when compared to BLVDS, and therefore, it requires more drive current. Similar to BLVDS, the effective impedance of these systems is lower than a typical pair of PCB traces due to backplane capacitance, the connectors on the backplane, and the line stubs. The following illustration shows an example implementation using 35 Ω stub resistors at every drop and 50 Ω stub resistors on either side of the bus. The termination values at the ends of the bus, which can range anywhere between 50 Ω and 70 Ω, must be optimized to match the effective differential impedance of the bus.

Figure 1. MLVDSE System Diagram