The Microchip LAN8820/LAN8820i is a low-power 10BASE-T/100BASE-TX/1000BASE-T Gigabit Ethernet physical layer (PHY) transceiver that is fully compliant with the IEEE 802.3 and 802.3ab standards.

The LAN8820/LAN8820i can be configured to communicate with an Ethernet MAC via the standard RGMII interface. It contains a full-duplex transceiver for 1000Mbps operation on four pairs of category 5 or better balanced twisted pair cable. Per IEEE 802.3-2005 standards, all digital interface pins are tolerant to 3.6V.

The LAN8820/LAN8820i is configurable via hardware and software, supporting both IEEE 802.3-2005 compliant and vendor-specific register functions via SMI. The LAN8820/LAN8820i implements Auto-Negotiation to automatically determine the best possible speed and duplex mode of operation. HP Auto-MDIX support allows the use of direct connect or cross-over cables.

Highlights

• Single-Chip Ethernet Physical Layer Transceiver (PHY)
• Compliant with IEEE 802.3ab (1000BASE-T), IEEE 802.3u (Fast Ethernet), and ISO 802-3/IEEE 802.3 (10BASE-T)
• HP Auto-MDIX support in accordance with IEEE 802.3ab specification at 10/100/1000 Mbps operation
• Miniature 56-pin QFN RoHS compliant package with RGMII (8 x 8 x 0.85mm height)
• Flexible configurations for LED status indicators
• Implements Reduced Power Operating Modes

Key Benefits

• High-Performance 10/100/1000 Ethernet Transceiver
  • Compliant with IEEE 802.3ab (1000BASE-T)
  • Compliant with IEEE 802.3/802.3u (Fast Ethernet)
  • Compliant with ISO 802-3/IEEE 802.3 (10BASE-T)
  • 10BASE-T, 100BASE-TX and 1000BASE-T support
  • Loop-back modes
  • Auto-negotiation (NEXT page support)
  • Automatic polarity detection and correction
  • Link status change wake-up detection
  • Vendor specific register functions
  • Supports reduced pin count RGMII interface
    • Controlled impedance outputs
    • Supports RGMII ID mode
  • Four status LED outputs and configurable LED modes with support for tricolor operation
  • Compliant with IEEE 802.3-2005 standards
    • RGMII pins tolerant to 3.6V
  • Integrated DSP implements adaptive equalizer, echo cancellers, and crosstalk cancellers
  • Efficient digital baseline wander correction
• Power and I/Os
  • Configurable LED outputs
  • Various low power modes
  • 2.5V I/O supply
• Miscellaneous Features
  • IEEE 1149.1 (JTAG) boundary scan
  • Multiple clock options - 25MHz crystal or 125MHz clock
• Packaging
  • 56-pin QFN (8x8 mm) RoHS compliant package with RGMII
• Environmental
  • Commercial temperature range (0°C to +70°C)
  • Industrial temperature range (-40°C to +85°C)

Target Applications

• Set-Top Boxes
• Networked Printers and Servers
• Test Instrumentation
• LAN on Motherboard
• Embedded Telecom Applications
• Video Record/Playback Systems
• Cable Modems/Routers
• DSL Modems/Routers
• Digital Video Recorders
• IP and Video Phones
• Wireless Access Points
• Digital Televisions
• Digital Media Adaptors/Servers
• Gaming Consoles
• POE Applications

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