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TRSF3243: min data rate

cafain
Mastermind 6535 points
Part Number: TRSF3243

HI staff

Let me ask you a question at the data rate of TRSF3243.

The FEATURES in the data sheet (SLLS862A) has the following description.

「Supports Operation From 250kbit/s to　1Mbit/s」

Similarly, page 5 Switching Characteristics also has a description of 250kbit/s to 1000kbit/s with the min specification.

Users will use TRSF3243 at a data rate of ～115.2kbps.

Question
・The data rate is lower than 250kbs (min) described in the data sheet, is it okay to use (～115.2kbps) it?

・Also, if there is a problem, is there a device that I can introduce?

best regards
cafain

  • 0
    Guru 281870 points

    An idle bus has a DC voltage. There is no lower limit on the signal frequency.

    There are other RS-232 devices that support only 250 kbps; that descriptions just says that the TRSF3243 can replace them.

  • 0 in reply to Clemens Ladisch
    TI__Guru 50795 points

    Thanks Clemens!

    Hi Cafain,

    The 250kbps is just a data point here and not a limit. There is no issue using this device for lower speeds. 

    Let us know if you have any more questions.

    Regards,
    Eric Schott

  • 0 in reply to Eric Schott1
    Mastermind 6535 points

    Hell Eric-san

    Thank you for your prompt response.

    I want to confirm,,,,,
    It is easier to understand if the maximum data rate of the device is expressed by the "max" value.
    Why is it specified by the "min" value?

    regards
    cafain

  • 0 in reply to cafain
    Guru 281870 points

    Are you referring to the Switching Characteristics table entries on page 5?

    Due to manufacturing variations and temperature effects, you will get devices that actually support more than 1 Mbps. That is, different devices and different circumstances result in different actual maximums. TI guarantees that all those actual maximum values are at least 1 Mbps; in other words, the smallest of those actual maximum values is at least 1 Mbps; in other words, the minimum maximum value is at least 1 Mbps.

  • 0 in reply to Clemens Ladisch
    TI__Guru 50795 points

    Thanks Clemens!

    The table format doesn't serve this specification too well, so it can certainly be confusing for parameters like this. I hope Clemen's good explanation helps clear this instance up a bit. 

    Regards,
    Eric Schott

  • 0 in reply to Eric Schott1
    Mastermind 6535 points

    Thanks Clemens-san, Eric-san

    Thank you for your detailed explanation.
    understood.
    I was convinced that it was a device that could be used for design apps.

    regards

    cafain