Ethernet PHY chip targets space-constrained applications in the car

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.

Data networks in vehicles rely on sub/partial networks in which some areas are put into sleep mode and activated when required. With the LAN8770, Microchip Technology now introduces an Ethernet PHY (Physical Layer Transceiver) that complies with the TC10 quiescent current standards of the OPEN Alliance. At less than 15 µA, it offers the industry's lowest quiescent current - comparable devices on the market require about four times more power, Microchip says.

The LAN8770 is a compact 100BASE-T1 Ethernet PHY with one port available in a 5mm x 5mm or 6mm x 6mm QFN package with wettable edges. The compact housing is ideal for applications with limited space such as the infotainment head unit, telematics modules or ADAS. The device offers a transmit and receive function of 100 Mbps over a single unshielded twisted pair cable (UTP), exceeds the requirements for electromagnetic interference in vehicles and is qualified for the automotive industry according to AEC-Q100 Class 1 (-40 to +125 °C). Furthermore, the device is prepared for use in safety-relevant applications. It simplifies the safety certification of the end product according to ISO26262 and supports special hardware safety functions; Failure Mode, Effects, and Diagnostic Analysis (FMEDA) and a safety manual.

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