BBT3420 pdf datasheet (Quad 2.

The BBT3420 is a quad 8-bit/10-bit parallel-to-serial and
serial-to-parallel transceiver device ideal for high-bandwidth
interconnection between line cards, serial backplanes, or
optical modules, over interconnect media such as Printed
Circuit Board (PCB) FR-4 traces or copper cables.
Each independent transceiver channel in BBT3420 is
capable of operating at 2.488-3.1875Gbps at full-rate, and
1.244-1.59375Gbps at half-rate. The four on-chip
transceivers shown in Figure 1-2 can also be configured as
a single 10 Gigabit Attachment Unit Interface (XAUI), for
both 10G Ethernet and 10G Fiber Channel or proprietary
backplane interfaces, providing up to 12.75Gbps of data
throughput at full duplex. The BBT3420 also supports the 10
Gigabit Media Independent Interface (XGMII) on the parallel
interfaces. The device can be used as an XGMII Extended
Sublayer (XGXS) device to support longer PCB traces
between optical transceiver modules and switch fabrics, as
shown in Figure 1-1.