Automotive Ethernet Standard

Based on established ethernet standards, adapted for automotive

  • Unshielded single twisted pair cabling designed for automotive environment and lower cost
  • 100Mbps and 1Gbps speed: Higher Bandwidth compared to CAN FD (15Mbps), FlexRay (10Mbps), MoST (150Mbps)
  • Can reuse existing Application Layer Ethernet stack
  • Uses PAM3 signaling to meet EMI/EMC requirement

The evolution

CAN-FD FlexRay 100BASE-T1
P802.3bwTM
1000BASE-T1
802.3bpTM
Datarate 15Mbps 10Mbps 100Mbps 1000Mbps
Symbol Rate NA NA 66.66MHz 750MHz
Signal Single ended Single ended PAM3 PAM3
Modulation NA NA 4B/3B 80B/81B
Length 100m@
0.5Mbps
24m 15m(Copper) 15m(Copper)
Cable 2 Wire 2 Wire Twisted pair (Bidirectional) Twisted pair (Bidirectional)

Multigigabit Ethernet which would address need beyond 1G is at spec development stage

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