Broadcom BCM84851 10GBASE-T transceiver

The device performs all physical-layerfunctions for 10GBASE-T, 1000BASE-T, and100BASE-TX Ethernet on Category 6, 6A, or 7twisted-pair cable. The 1000BASE-T and 100BASETXcan operate on standard Category 5e UTP. TheBCM84851 supports the XFI/10GBASE-KR and1000BASE-X(SGMII) interface for connection to aMAC. The BCM84851 is a highly integrated solutioncombining digital adaptive equalizers, ADCs, phaselockedloops, line drivers, encoders, decoders, echocancellers, crosstalk cancellers, and all requiredsupport circuitry.

Key features

• Enhanced Cable Diagnostics
• XFI/10GBASE-KR and SGMII MAC Interface
• Auto sense mode
• Low electromagnetic interference (EMI) emissions

Additional features

• 10GBASE-T IEEE 802.3an
• 1000BASE-T IEEE 802.3ab
• 100BASE-TX IEEE 802.3u
• IEEE 802.3z
• IEEE 802.3az
• XFI/10GBASE-KR and SGMII MAC Interface
• IEEE 1588-2008 version 2-compliant
• IEEE fast retrain and link monitoring
• EEE on 10GBASE-T, 1000BASE-T, and
• 100BASE-TX
• Auto sense mode
• Trace matched output impedance
• Line-side loopback
• Low electromagnetic interference (EMI) emissions
• Enhanced Cable Diagnostics
• Support for jumbo packets up to 18 KB
• Detection and correction of pair swaps (MDI
• crossover), pair skew, and pair polarity
• Auto-negotiation with next page support
• IEEE 1149.1 (JTAG) and IEEE 1149.6 (ACJTAG)
• boundary scan support
• Low-power, 1.0V CMOS core
• 1.2V or 2.5V MDIO I/O, 1.8V CMOS I/O
• Device package: 11 mm x 11 mm BGA

Applications

• 10-Gigabit Ethernet (GbE) switches and uplinks
• 10GbE server adapter
• 10GbE host control