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TCAN332G: interoperability for MilCAN & SAEJ1939

Kah Wei Leung
Prodigy 50 points
Part Number: TCAN332G
Other Parts Discussed in Thread: TCAN1051, TCAN1042-Q1, TCAN1051-Q1

Hi,

i am looking for CAN Transceiver which able to support MilCAN & SAEJ1939. It does not require to be a single IC able to support both protocol.

Does TCAN332G support any of it?

Thank you.

Regards,

Kah Wei

  • 0
    TI__Prodigy 200 points
    Hello Kah Wei,

    MilCAN is a higher layer protocol that is applied above a standard CAN physical layer, as specified by ISO 11898. Similarly SAEJ1939 is based on a physical layer as defined by ISO 11898. Specifically J1939/11 and J1939/15 use a data rate of 250 kbit/s and J1939/14 uses a data rate of 500 kbit/s. SAEJ1939 requires the use of classic CAN data frames instead of CAN FD frames currently.

    TCAN332G is listed in the datasheet as being "compatible with ISO 11898-2". The reason it does not fully meet the electrical specifications of ISO 11898-2 is because TCAN332G is a 3.3V CAN transceiver and the ISO 11898-2 standard specifications were written for 5V CAN transceivers. Still, the TCAN332G was designed to have output driver and input receiver specifications that allow it to be interoperable with a 5V CAN bus and meets the other requirements of 11898-2.

    The TCAN332G supports data rates up to 5 MBit/s so it can cover the data rates required by SAEJ1939. TCAN332G supports CAN FD but also works with classic CAN data frames as well. TCAN332G should have interoperability for MilCAN and SAEJ1939 applications.

    We also offer 5V CAN transceivers that fully meet the requirements of ISO 11898-2 such as the TCAN1042 and TCAN1051 family of devices, which will work in these applications as well.

    Best Regards,
    Richard Broughton
    Transceiver Interface - Applications Engineer
  • 0 in reply to Richard Broughton
    TI__Prodigy 200 points

    I did a little more checking into SAE J1939. J1939/11 requires a maximum voltage on the bus pins of +/-16 V for 12 V battery systems (and + / - 32V for 24 V battery systems. The TCAN332G only supports an absolute maximum voltage on the CAN pins of +/- 14V. You are probably better off using the TCAN1042-Q1 or TCAN1051-Q1 families for a SAE J1939 application because they have much higher stand off voltage on the bus pins.

    Regards,

    Richard