The Microchip LAN8700/LAN8700i is a low-power industrial temperature (LAN8700i), variable I/O voltage, analog interface IC with HP Auto-MDIX support for high-performance embedded Ethernet applications. The LAN8700/LAN8700i can be configured to operate on a single 3.3V supply utilizing an integrated 3.3V to 1.8V linear regulator. An option is available to disable the linear regulator to optimize system designs that have a 1.8V power plane available.

The LAN8700/LAN8700i consists of an encoder/decoder, scrambler/descrambler, wave-shaping transmitter, output driver, twisted-pair receiver with adaptive equalizer and baseline wander (BLW) correction, and clock and data recovery functions. The LAN8700/LAN8700i can be configured to support either the Media Independent Interface (MII) or the Reduced Media Independent Interface (RMII).

The LAN8700/LAN8700i is compliant with IEEE 802.3-2005 standards (MII Pins tolerant to 3.6V) and supports both IEEE 802.3-2005 compliant and vendor-specific register functions. It contains a full-duplex 10-BASE-T/100BASE-TX transceiver and supports 10-Mbps (10BASE-T) operation on Category 3 and Category 5 unshielded twisted-pair cable, and 100-Mbps (100BASE-TX) operation on Category 5 unshielded twisted-pair cable.

Note: The LAN8700/LAN8700i are not recommended for new designs. The LAN8710/LAN8720 are the suggested replacement devices for these products.

Features

• Single-Chip Ethernet Physical Layer Transceiver (PHY)
• ESD Protection levels of ±8kV HBM without external protection devices
• ESD protection levels of EN/IEC61000-4-2, ±8kV contact mode, and ±15kV for air discharge mode per independent test facility
• Comprehensive flexPWR® Technology
  • Flexible Power Management Architecture
• LVCMOS Variable I/O voltage range: +1.6V to +3.6V
• Integrated 3.3V to 1.8V regulator for optional single supply operation
  • Regulator can be disabled if 1.8V system supply is available
• Performs HP Auto-MDIX in accordance with IEEE 802.3ab specification
• Cable length greater than 150 meters
• Automatic Polarity Correction
• Latch-Up Performance Exceeds 150mA per EIA/JESD 78, Class II
• Energy Detect power-down mode
• Low Current consumption power-down mode
• Low operating current consumption:
  • 39mA typical in 10BASE-T and
  • 79mA typical in 100BASE-TX mode
• Supports Auto-negotiation and Parallel Detection
• Supports the Media Independent Interface (MII) and Reduced Media Independent Interface (RMII)
• Compliant with IEEE 802.3-2005 standards
  • MII Pins tolerant to 3.6V
• IEEE 802.3-2005 compliant register functions
• Integrated DSP with Adaptive Equalizer
• Baseline Wander (BLW) Correction
• Vendor Specific register functions
• Low profile 36-pin QFN RoHS compliant package (6 x 6 x 0.9mm height)
• 4 LED status indicators
• Commercial Operating Temperature 0° C to 70° C
• Industrial Operating Temperature -40° C to 85° C version available (LAN8700i)

Applications

• Set-Top Boxes
• Network Printers and Servers
• LAN on Motherboard
• 10/100 PCMCIA/CardBus Applications
• Embedded Telecom Applications
• Video Record/Playback Systems
• Cable Modems/Routers
• DSL Modems/Routers
• Digital Video Recorders
• Personal Video Recorders
• IP and Video Phones
• Wireless Access Points
• Digital Televisions
• Digital Media Adaptors/Servers
• POS Terminals
• Automotive Networking
• Gaming Consoles
• Security Systems
• POE Applications
• Access Control