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TCAN1057AV-Q1: TCAN1057AVDDFRQ1 Hardware circuit troubleshooting

Santu Reddy
Prodigy 35 points

Part Number: TCAN1057AV-Q1

Dear Team,

We are currently TCAN1057AVDDFRQ1 part in our board. And we are unable to communicate with CAN Device.

We read few other forum about Pull up Resistor on TXD pin, is that needed.

Below is our hardware circuit

TXD and RXD are directly connected to MCU and CANL and CANH are connected to a Connector.

Now we have tested our firmware with other CAN chip from previous design like SN65HVD230 and with below hardware

which is working fine, so I wanted to understand our mistake in the current part we are using circuit.

Looking forward to your suggestions.

Thank you.

  • 0
    TI__Guru 72272 points

    Santu,

    The TCAN1057AV-Q1 is a 5V CAN transceiver, so the VCC pin being supplied with 3.3V leaves the device in an under voltage state. The SN65HVD230 is a 3.3V transceiver, which is why your previous design worked. 

    Are you looking for an updated 3.3V CAN transceiver, or moving to a 5V CAN bus?

    Regards,

    Eric Hackett 

  • 0 in reply to Eric Hackett
    Prodigy 35 points

    Dear Eric,

    Thank you for pointing out the error.

    The recommended Vcc is 4.5 - 5.5V

    Vio supports 1.7 - 5.5V

    I'm looking for new part which is cost effective and support 3.3V CAN Transceiver.

    Another difference I have released is our MCU supports only CAN2.0B, and TCAN1057AV-Q1 supports CAN FD. So if I use a CAN transceiver part which supports CAN FD will it work with our MCU?

    Thank you.

  • 0 in reply to Santu Reddy
    TI__Guru 72272 points

    Santu,

    We have a new line of 3.3V CAN transceivers releasing later this year, otherwise the TCAN330 would be a good, relatively newer replacement devices. And the CAN FD transceiver can still support CAN2.0B.

    Regards,

    Eric Hackett 

  • 0 in reply to Eric Hackett
    Prodigy 35 points

    Hi Eric,

    Thanks for recommending an alternative part. I've also come across some additional components that support 3.3V, such as the TCAN34XX series.

    In all the datasheets I've reviewed, they mention an MCU with CAN FD channels under the SYSTEM EXAMPLE section.

    I'll look into the current part TCAN1057AV-Q1, where we'll adjust the VIN to 5V and test it with CAN 2.0 communication.

    Thank you.