OVERVIEW
The BCM5466R is a member of Broadcom’s QuadSquad™ family of quad Gigabit Ethernet PHYs. It consists of four complete 10/100/1000BASE-T Gigabit Ethernet transceivers integrated on a single monolithic CMOS chip. The BCM5466R is optimized for low power and small footprint size to enable high-port-density applications. The BCM5466R enables a new class of cost-effective Gigabit Ethernet equipment by lowering system cost and reducing power dissipation by nearly 25 percent, driving the delivery of Gigabit Ethernet bandwidth to the desktop.
The BCM5466R DSP-based architecture and advanced power management techniques combine to achieve robust and low-power operation over existing Category 5 twisted-pair wiring. The BCM5466R architecture not only meets the requirements of the IEEE 802.3, IEEE 802.3u, and IEEE 802.3ab specifications, but also maintains the industry’s highest level of margin over IEEE requirements for echo, near-end crosstalk (NEXT), and far-end crosstalk (FEXT). Low power is key to implementing high-density Gigabit Ethernet switches, and the BCM5466R has the lowest power in the industry at 750 mW per port. In addition, the BCM5466R has extremely low EMI emissions, which reduces the design constraints required to meet EMI radiation specifications.

FEATURES
• Four fully-integrated 10BASE-T/100BASE-TX/1000BASE-T Gigabit Ethernet transceivers
• RGMII, SGMII, and SerDes MAC interface options
• 1-Gbps line-side SerDes with an RGMII MAC interface
• Fully compliant with IEEE 802.3, IEEE 802.3u, and IEEE 802.3ab standards
• 0.13-micron CMOS for low power consumption and low cost
• Supports copper or fiber operation in RGMII mode
• Low power
   - 750 mW per port
   - Advanced power management
• Trace-matched output impedance
• Line-side loopback
• Ethernet@Wirespeed™ support
• Low EMI emissions
• CableChecker™ diagnostics
   - CableChecker software detects cable plant impairments.
   - Link quality indication LED.
   - Automatic detection and correction of wiring pair swaps, pair skew, and pair polarity.
   - Automatic MDI/MDIX crossover at all speeds.
• Robust cable-sourced electrostatic discharge (CESD) tolerance
• Support for jumbo packets of up to 10 kB
• IEEE 1149.1 (JTAG) boundary scan
• 256-pin BGA package