LAN8720AI-CP

The LAN8720A/LAN8720Ai is a low-power 10BASE-T/100BASE-TX physical layer (PHY) transceiver with variable I/O voltage that is compliant with the IEEE 802.3-2005 standards. The LAN8720A/LAN8720Ai supports communication with an Ethernet MAC via a standard RMII interface. It contains a full-duplex 10-BASE-T/100BASE-TX transceiver and supports 10Mbps (10BASE-T) and 100Mbps (100BASE-TX) operation. The LAN8720A/LAN8720Ai 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 LAN cables. The LAN8720A/LAN8720Ai supports both IEEE 802.3-2005 compliant and vendor-specific register functions. However, no register access is required for operation. The initial configuration may be selected via the configuration pins. Register-selectable configuration options may be used to further define the functionality of the transceiver. Per IEEE 802.3-2005 standards, all digital interface pins are tolerant to 3.6V. The device can be configured to operate on a single 3.3V supply utilizing an integrated 3.3V to 1.2V linear regulator. The linear regulator may be optionally disabled, allowing usage of a high efficiency external regulator for lower system power dissipation. The LAN8720A/LAN8720Ai is available in both extended commercial and industrial temperature range versions.

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 Adapters/Servers
• Gaming Consoles
• POE Applications (Refer to Application Note 17.18)

Key features

• Single-Chip Ethernet Physical Layer Transceiver (PHY)
• Comprehensive flexPWR Technology - Flexible Power Management Architecture - LVCMOS Variable I/O voltage range: +1.6V to +3.6V - Integrated 1.2V regulator
• HP Auto-MDIX support
• Miniature 24-pin QFN/SQFN lead-free RoHS compliant packages (4×4 mm)
• High-Performance 10/100 Ethernet Transceiver - Compliant with IEEE802.3/802.3u (Fast Ethernet) - Compliant with ISO 802-3/IEEE 802.3 (10BASE-T) - Loop-back modes - Auto-negotiation - Automatic polarity detection and correction - Link status change wake-up detection - Vendor specific register functions - Supports the reduced pin count RMII interface
• Power and I/Os - Various low power modes - Integrated power-on reset circuit - Two status LED outputs - Latch-Up Performance Exceeds 150mA per EIA/JESD 78, Class II - May be used with a single 3.3V supply
• Additional Features - Ability to use a low cost 25Mhz crystal for reduced BOM
• Packaging - 24-pin QFN/SQFN (4×4 mm) Lead-Free RoHS Compliant package with RMII
• Environmental - Extended commercial temperature range (0°C to +85°C) - Industrial temperature range version available (-40°C to +85°C)