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Ethernet Controller, 100 Mbps, IEEE 802.3, IEEE 802.3u, 1.14 V, 3.6 V, QFN, 32 Pins

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LAN8740A-EN   Datasheet
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Product Overview

The LAN8740A-EN 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. It 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 10Mbps (10Base-T) and 100Mbps (100Base-TX) operation. It 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. It supports both IEEE 802.3-2005 compliant and vendor-specific register functions.
  • Compliant with energy efficient Ethernet 802.3az
  • Cable diagnostic support
  • Wake on LAN (WoL) support
  • Flexible power management architecture
  • HP Auto-MDIX support
  • 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
  • Various low power modes
  • Integrated power-on reset circuit
  • Two status LED outputs


Wireless, Consumer Electronics, Automation & Process Control, Communications & Networking, Test & Measurement, Embedded Design & Development


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IEEE 802.3, IEEE 802.3u









MSL 3 - 168 hours

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Technical Documents (2)

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Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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