BCM54811SA2IFBG

The BCM5481 is optimized for low power and small footprint size to enable uplink and general Gigabit Ethernet connectivity applications. By lowering system cost and reducing power dissipation, the BCM5481enables a new class of cost-effective Gigabit Ethernet equipment, driving the delivery of Gigabit bandwidth to the desktop. The BCM5481 digital signal processor-based architecture and advanced power management techniques combine to achieve robust and low power operation over the existing CAT-5 twisted-pair wiring.


The BCM5481 architecture also meets the requirements of 802.3, 802.3u, and 802.3ab, but maintains the industry’s highest level of margin over IEEE requirements for Echo, NEXT, and FEXT. Low power is a key factor in implementing Gigabit small form factor NICs and uplinks and, at less than 700 mW per port, the BCM5481 has the industry's lowest power. Also, the BCM5481 has extremely low EMI emissions, which reduces the design constraints required to meet EMI emissions specifications. In addition to supporting the IEEE 802.3 standard Gigabit Media Independent Interface (GMII), the BCM5481 also supports the reduced gigabit media independent interface (RGMII). RGMII is a reduced pin count (12 versus 25) version of the GMII. The small package, multiple MAC interfaces, and streamlined power supply lowers system cost and simplifies the system and board level design.


This device is another member of Broadcom's 0.13µ Gigabit copper PHY family, joining the BCM5461, BCM5461S, BCM5464, BCM5464S, BCM5482, BCM5482S, BCM5488, and BCM5488S. The0.13 µm process is the optimal process that offers the best performance, lowest cost, and lowest power for Gigabit copper solutions. Further, devices based on the 0.13µ process offer an excellent long-term cost curve, enabling better cost reduction over time, compared to older technologies, without having to redesign or requalify a new part. The BCM5481 incorporates a number of advanced features.

• Fully integrated 10BASE-T/100BASE-TX/1000BASE-T Gigabit Ethernet transceiver
• GMII, RGMII, and MII MAC interface options
• On-chip low-voltage regulators
• Fully compliant with IEEE 802.3™, 802.3u, and 802.3ab standards
• 0.13µ CMOS—low power and cost
• Low power
  • Less than 700 mW per port
  • Advanced power management
• Trace matched output impedance
• Line-side loopback
• Low electromagnetic interference (EMI) emissions
• Cable-plant diagnostics
  • Cable plant analyzer function 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 CESD tolerance
• Support for jumbo packets up to 10 KB
• IEEE 1149.1 (JTAG) boundary scan
• 64-pin MLP, 68-pin MLP, 100-pin FBGA, and 100-pin QFP packages