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TCAN1044A-Q1: 5Mbps and 8 Mbps CAN communication

Amy Luo
Expert 6895 points
Part Number: TCAN1044A-Q1

Hi team,

One of our customers is using the TCAN1044ADRQ1 chip for CAN communication and found that 1M can be tested pass, 5M, 8M can not pass, could you please provide some troubleshooting suggestions

Disconnect the paired device and grab the CAN waveform as follows:

Communication is normal at 1Mbps:

Best Regards,

Amy Luo

  • 0
    TI__Guru 53555 points

    Hi Amy,

    The maximum data rate that a CAN system can support is dependant on many system-level characteristics including the CAN transceiver, network topology, stub count and length, number of nodes, cable quality and impedance consistency and much more. Note that 8Mbps in only possible in very small and simple networks. Similarly, 5Mbps is difficult to achieve in most real systems. 2Mbps is the typical maximum we see in many applications today that do not make use of the new CAN SIC technology. 

    Would it be possible to share a diagram of the network topology used in this test that shows the length of cable between each node in the system? Please include where the termination resistors are placed in the network and if any transceivers are not TCAN1044As. 

    Has this test been able to successfully communicate at 5Mbps or faster with other transceivers? 

    Regards,
    Eric Schott