The Broadcom BCM5396 device is a highly integrated solution ideally suited for standalone Gigabit Ethernet switches and Gigabit Ethernet control plane and backplane applications. It combines all the functions of a high-speed switch system, including packet buffer, SerDes, media access controllers, address management, and a nonblocking switch fabric into a single 0.13 µm CMOS device. The BCM5396 complies with IEEE 802.3, 802.3u, 802.3ab, and 802.3x specifications, including the MAC control, pause frame, and autonegotiation subsections, providing compatibility with all industrystandard Ethernet, Fast Ethernet, and Gigabit Ethernet devices. The integrated sixteen SerDes cores enable direct connections across backplanes with the lowest possible amount of traces. The device also integrates seventeen IEEE compliant 10/100/1000 MACs. Sixteen of these are internally connected to the SerDes cores offering alternatively true serial interfaces for backplane connections or fiber optic transceivers or SGMII interfaces for connection to industry-standard Gigabit Ethernet copper transceivers such as the Broadcom BCM5464R. The seventeenth MAC features multiple MII interface modes (RvMII, RGMII, GMII) for connection to a variety of CPUs.The media access controllers on the BCM5396 also support jumbo frames which are typically used for high-performance connections to servers because they offer a smaller percentage of overhead on the link for more efficiency.
Eighth-generation switch on a chip
One GMII/RGMII/RvMII interface
Seventeen MACs (802.x compliant) with support for 9-KB jumbo frames
Sixteen SGMII/SerDes interfaces and 256-KB packet buffer memory