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THVD2410: Difference between prototype samples (silicon rev A) and released catalog (silicon rev B1)

Cameron Wutzke
Intellectual 1991 points
Part Number: THVD2410

Hi experts,

A customer has noticed a difference between the prototype samples Rev A of this transceiver and the RTM Rev B1 version.

The datasheet does not mention silicon revisions.

With several transceivers on a common bus, larger amplitude signals are generated from Rev B1 silicon and the smaller signals from Rev A silicon. Any insight what could cause this?

Thank you,

Cameron

  • 0
    TI__Intellectual 1991 points

    This part has been causing failures in product's ability to communicate using the RS485 bus at the end-of-line functional test they run.

    Most are getting through the test but we noticed atypical numbers of products with the Rev A transceivers failing the test station.  What I am trying to figure out is if all the products built with these parts that passed are likely to cause me future problems in the field.  

    Note that in the end-of-line test, the other side of the communication link (the one that my failed Rev A transceiver is talking to) typically has a different style RS-485 transceiver chip in it (sometimes a Rev B silicon of the 2410 part and sometimes a different TI RS485 transceiver model altogether).

  • +1 in reply to Cameron Wutzke
    TI__Mastermind 47895 points

    Hi Cameron,

    The production version of this device has several differences from the sample devices to ensure that all of the datasheet specifications are able to be met consistently. Because they are pre-production, we cannot guarantee current datasheet specifications for sample device. This may also be a reason why the customer is seeing failures with the sample devices. 

    Was the customer planning to use these samples in production hardware? 

    Let me know if I'm understanding this situation correctly or if I have misunderstood the meaning of "Rev A" and "Rev B1".

    Regards,
    Eric Schott

  • 0 in reply to Eric Schott1
    TI__Intellectual 1991 points

    Hi Eric,

    You understood correctly. I think this is the exact reason customer is experiencing issues with pre-production rev A. Thank you!