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Asking for Multi protocol Transceiver (RS232, RS 485, RS 422)

Genius 17595 points

Hi Team,

Do we have Multi protocol Transceiver (RS232, RS 485, RS 422) right now?

Thanks,

SHH

  • Hi SHH,

    No, we do not have such a device at this time. Here is a reference design showing how this could be implemented using multiple devices:

    www.ti.com/.../TIDA-00540

    If you see a need for products like this from TI, please send me an email with more details - I would be interested to hear more.

    Thank you,
    Max
  • Genius 17595 points

    In reply to Max Robertson:

    Hi Max,
    What's the benefit if using multiple chip solution instead of one chip solution?

    Can this referece design also support 422?
    uk.rs-online.com/.../

    Could you let me know the pro and cons?


    Thanks,
    SHH

  • In reply to SHH:

    SHH,

    Yes, this reference design supports RS-422. (Most RS-485 transceivers can be used for RS-422 as well, since in general RS-485 requirements are more strict.) The advantages of a multi-chip solution are flexibility in channel configurations, device selections, and in placement of the devices on a PCB. There may be some cost advantages as well depending on the specific devices selected.

    Max
  • Genius 17595 points

    In reply to Max Robertson:

    Hi Max,

    can the design only use one DB-9?

    Thanks,

    SHH

  • In reply to SHH:

    SHH,

    Yes, this design allows the RS-422/485 and RS-232 to share the same signal lines, meaning that extra conductors are not needed and a single DB-9 can be used.

    Max
  • In reply to Max Robertson:

    Hi Max,

    Could you help provide TIDA-00540 PCB file?Thanks.

    And this reference design can compare SP339 multi protocol device, we have any benefit?

    John

  • In reply to Kuo John:

    John,

    I have attached the PCB files.  The advantages of this multi-chip implementation are that it gives more flexibility in RS-232/RS-485 component selection (in case certain performance criteria like ESD robustness, high-voltage immunity, etc. are needed) and in PCB design (since the different devices can be placed to that routing is simple).  Please let me know if you need anything else.

    Regards,
    MaxRS-485_RS-232_ODB.zipRS-485_RS-232_IPC-D-356A Netlist.zipRS-485_RS-232_GerberNCdrills.zip

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