Ethernet PHY chip targets space-constrained applications in the car: Page 2 of 2

July 28, 2020 //By Christoph Hammerschmidt
Ethernet PHY chip targets space-constrained applications in the car
Microchip's LAN8770 is an IEEE-802.3bw compliant 100BASE-T1 PHY with the lowest available TC-10 compliant quiescent current.

The LAN8770M and LAN8770R support communication with an Ethernet MAC via standard MII/RMII or MII/RMII/RGMII interfaces. An optional 125 or 50 MHz reference clock output is also provided for RGMII and RMII applications, often eliminating the need for an external reference clock.

The LAN8770x's PHY diagnostic functions provide troubleshooting capabilities through Microchip's integrated LinkMD cable diagnostic system, which can detect cable defects, short circuits or open circuits. The device also provides receiver signal quality (SQI) indication, over-temperature and under-voltage protection, support for status interrupts, and various loopback and test modes. The PHYs are supported by Microchip's free online design service, LANCheck, which reviews customer designs and ensures that best design practices are applied. Autosar, Linux and RTOS software drivers are also available.

A separate 100BASE-T1 to 100BASE-TX Media Converter evaluation kit is now available. A 100BASE-T1 daughter card evaluation board is available for the Microchip ATSAMV71-XULT Xplained Ultra microcontroller kit and the SAMA5D3-EDS microprocessor kit.

The new Ethernet PHY series includes two devices: LAN8770M (MII/RMII) and LAN8770R (MII/RMII/RGMII) in 5mm x 5mm 32-pin and 6mm x 6mm 36-pin QFN packages, which are available immediately.

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