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Original question:

MAX3238: Csompare to SP3232

TRS3232E: When replacing SP3232E with TRS3232E, it can't commnicate successfully

Eggsy Pang
Expert 4985 points
Part Number: TRS3232E

Hi team,

Customer used Sipex SP3232E, I promoted TRS3232E to replace.

When replacing SP3232E with TRS3232E in customer board by welding, it can't commnicate successfully.

Do you know why?

Thanks!

  • 0
    TI__Mastermind 25705 points

    Hi Eggsy,

    What's the setup of the IC, like the value of external capacitor and the supply? To debug, you can start from V+/V- pins (charge pump output), which govern the driver’s output voltage amplitude. If V+/V- don’t reach the expected voltage (V+>5V, V-<-5V), the communication could have problem. Please let me know if you have more questions. If V+/V- look OK, you can check the driver and receiver output to see if they response to the input. Please let me know if you have more questions.

    Regards,

    Hao

     

  • 0 in reply to Hao L
    TI__Guru 62910 points

    Hi Eggsy,

    Have you had a chance to debug this any further?  Do you have any updates you could share?  Please let us know if we can help.

    Regards,
    Max