The DS250DF230 has strong equalization capabilities that allow it to equalize insertion loss, reduce jitter, and extend the reach of front-port interfaces. Two pieces DS250DF230 can be used to support all four egress channels for a 100GbE port. Another two pieces DS250DF230 can be used to support all four ingress channels for the same 100GbE ports. Alternatively, a single DS250DF230 can be used to support all egress channels for two 25GbE ports, and another DS250DF230 can be used to support all two ingress channels for the same four 25GbE ports.

A flow-through pinout for the high-speed signals on DS250DF230 makes placement and routing easy for unidirectional application. By using the 2x2 cross point inside the device, DS250DF230 can also be configured for Figure 9-2, where one single device supports both egress and ingress channels.

Figure 9-2 Bidirectional Application

For applications which require IEEE802.3 100GBASE-CR4 or 25GBASE-CR auto-negotiation and link training, a linear repeater device such as the DS280BR820 (or similar) is recommended.

Figure 9-3 shows this configuration, and Figure 9-4 shows an example simplified schematic for a typical front-port application.

Figure 9-3 Front-Port Application Block Diagram

Figure 9-4 Front-Port Application Schematic