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100BASE-T1 Ethernet PHY Transceiver

The Microchip LAN8770 is a compact, cost-effective, single-port 100BASE-T1 Ethernet physical layer transceiver compliant with the IEEE 802.3bw-2015 specification. The device provides 100 Mbit/s transmit and receive capability over a single Unshielded Twisted Pair (UTP) cable.


The LAN8770 is available in a Grade 1 Automotive (-40°C to +125°C) temperature range and is optimized for AEC-Q100 automotive use cases such as Automated Driver-Assistance Systems (ADAS), infotainment, telematics, smart antennas, and in-vehicle backbones. In addition, the family is Microchip Functional Safety Ready; specifically designed to simplify customers end-product ISO26262 safety certification with the support of specialized hardware safety features, Failure Modes, Effects, and Diagnostic Analysis (FMEDA) and safety manual.

Microchip’s LAN8770 EtherGREEN™ energy efficient technology provides low-power 100BASE-T1 PHY operation along with support for OPEN Alliance TC10 with an ultra low-power sleep and wake-up mode. FlexPWR® variable I/O and core power supply voltages provide flexible design options and power saving opportunities. Advanced PHY diagnostics provide the user with troubleshooting capabilities such as the Signal Quality Indicator (SQI), LinkMD® cable defect detection), over-temperature, under-voltage protection, comprehensive status interrupt support, and various loopback and test modes.


Additional Features

  • Supports MII/RMII/RGMII interface with SMI management for rapid register access

  • OPEN Alliance TC10 support

  • FlexPWR® technology power management

  • Extended cable reach

  • Small footprint 32-pin VQFN (5 x 5 mm) and 36-pin VQFN (6 x 6 mm) with wettable flanks

  • Grade 1 Automotive (-40°C to +125°C) qualified

  • Fully integrated transmission line filtering

  • MII/RMII/RGMII drive strength adjust

  • 125MHz RGMII clock slew rate adjust

  • Ultra low-power sleep mode (typical 12uA)

  • Microchip Functional Safety Ready

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