Microchip Technology LAN8740AI-EN-TR

Description

The LAN8740A/LAN8740Ai 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, 802.3u, and 802.3az (Energy Efficient Ethernet) standards. Energy Efficient Ethernet (EEE) support results in significant power savings during low link utilizations. The LAN8740A/LAN8740Ai supports communication with an Ethernet MAC via a standard MII (IEEE 802.3u)/RMII interface. It contains a full-duplex 10-BASE-T/100BASE-TX transceiver and supports 10 Mbps (10BASE-T) and 100 Mbps (100BASE-TX) operation. The LAN8740A/LAN8740Ai 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. Integrated Wake on LAN (WoL) support provides a mechanism to trigger an interrupt upon reception of a
perfect DA, broadcast, magic packet, or wakeup frame.

Highlights

• Single-Chip Ethernet Physical Layer Transceiver
(PHY)
• Compliant with Energy Efficient Ethernet 802.3az
• Cable diagnostic support
• Wake on LAN (WoL) support
• Comprehensive flexPWR technology
- Flexible power management architecture
- LVCMOS Variable I/O voltage range: +1.8 V to
+3.3 V
- Integrated 1.2 V regulator with disable feature
• HP Auto-MDIX support
• Small footprint 32-pin VQFN, RoHS-compliant
package (5 x 5 x 0.9 mm height)
• Deterministic 100 Mb internal loopback latency
(MII Mode)

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

Key Benefits

• High-performance 10/100 Ethernet transceiver
- Compliant with IEEE802.3/802.3u (Fast Ethernet)
- Compliant with ISO 802-3/IEEE 802.3
(10BASE-T)
- Compliant with Energy Efficient Ethernet IEEE
802.3az
- Loop-back modes
- Auto-negotiation
- Automatic polarity detection and correction
- Link status change wake-up detection
- Vendor specific register functions
- Supports both MII and the reduced pin count RMII
interfaces
• Power and I/Os
- Various low power modes
- Integrated power-on reset circuit
- Two status LED outputs
- May be used with a single 3.3 V supply
• Additional Features
- Ability to use a low cost 25 MHz crystal for
reduced BOM
• Packaging
- 32-pin VQFN (5 x 5 mm), RoHS-compliant
package with MII and RMII
• Environmental
- Commercial temperature range (0°C to +70°C)
- Industrial temperature range (-40°C to +85°C)