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ISO1430: ISO1430

paolo ziveri1
Prodigy 30 points
Part Number: ISO1430
Other Parts Discussed in Thread: ISO1450, ISO1432

I plan to use the ISO1430 in a new CPU board but I am indecise, can you help me?

Is the ISO1430 a subset of the  ISO1450?

May I provide a layout in the board with these two components?

Thank you.

regards.

Paolo.

  • +1
    TI__Expert 3482 points

    Hi Paolo,

    Thank you for reaching out to us!


    The main difference between ISO1430 and ISO1450 is the maximum data rate. ISO1450 maximum data rate is 50Mbps, and ISO1430 is 12Mbps.
    Since ISO1450 supports a higher data rate than ISO1430, it has a faster rise/fall time and shorter propagation delay as shown in section 8.13 and 8.14 of the datasheet. You should choose a device that meets your system setup time, hold time, and delay time requirements.

    In addition, ISO1450 has a higher maximum power dissipation than ISO1430 to support a higher data rate as shown in section 8.5 of the datasheet. If low power is a requirement for your design, ISO1430 would be a preferred choice.

    ISO1430 and ISO1450 is pin2pin. You can use the same layout for these two devices.

    Regards,

    Alfred

  • +1 in reply to Alfred Chong
    Prodigy 30 points

    Thank you Alfred.

    Onothet question, why TI didn't  release the chipISO41430 ( half duplex) and 1432 (full duplex) pin compatible?

    It could be a good setting to provide one layout for both components.

    They are provided  by Mouser  with different delay time and it is a problem to chose one chip respect to another one.

    Thanks again.

  • 0 in reply to paolo ziveri1
    TI__Expert 3482 points

    Hi Paolo,

    I'm sorry to hear that you are having difficulty in acquiring the ISO1430 devices.

    The pin A and B of ISO1430 is functioning as input and output.

    The pin A and B of ISO1432 is functioning as input.

    Even though they have the same pin names but functionally they are not the same.

    You can't replace ISO1430 with ISO1432 without changing your layout to connect

    the pin Y to pin A , and the pin Z to pin B. 

    Regards,

    Alfred

  • 0 in reply to Alfred Chong
    Prodigy 30 points

    Thank you very much for your collaboration.

    I tried to resolve my issue to make the layout for both ISO1430 and 1432 in this mode:

    When I put the ISO1430 I need to close the JP22 ( pin A = D+ and pin B = D-)

    When I put the ISO 1432 I need to close the JP23 to have the same D+ and D- with pin Y connectec to pinA and pin Z connected to pinB.

    I hope this solution is OK!

    Your opinion will be very appreciated.

    Bye.

    Paolo. 

  • 0 in reply to paolo ziveri1
    TI__Intellectual 1960 points

    Hi Paolo:

    Thanks for sharing your schematic.

    I don't see any concerns with your approach; ISO1432 should work just like ISO1430 with the two jumpers closed.

    Regards,

    Dushmantha