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ISO7740: Please provide a「Lacth-UP test」deta

Part Number: ISO7740

Dear All,


Thank you for your cooperation.
Please provide a「Lacth-UP test」deta.
Part number:ISO7740FDW and ISO7740FDWR(SOIC  DW 16pin)

Not listed in TI.com qualification summary.


Thanks & Best regards,
Tami Higasa

  • Hi Tami,

    Thank you for your interest in ISO7740. Could you place your request on TI Customer Support Center at the below link so that they can help you with your request? Thanks.

    Regards,
    Koteshwar Rao

  • Dear Koteshwar Rao

    Thank you for your cooperation.

    I have already contacted the Customer Center.
    So I was told to ask e2e.
    Below, I will send the text.

    Please send LU test data as soon as possible.

    Please respond to TI’s proposed solution

     


    樋笠様

    いつもお世話になっております。
    Lacth-UPデータにつきましては、大変申し訳ございませんが、担当部署の指示によりますと提供することは出来かねます。
    Lacth-UPデータは通常テータシートに掲載されるはずですが、データシートで掲載されなければ、入手する方法はe2eで直接にリクエストすることになります。
    お手数をおかけしますが、e2eを利用してリクエストを提出していただけないでしょうか。
    リンクは以下になります。
    https://e2e.ti.com/

    他にご質問がありましたら、いつでもご連絡ください。
    どうぞよろしくお願いいたします。

    ユフィミヤ
    TI カスタマサポートセンター
    ==========================================================================================
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    Please let us know if this resolves your request, or if there is anything else we can help you with.

  • Hi Tami,

    Sorry about that. Please allow me to check on this and come back to you tomorrow. Thanks.

    Regards,
    Koteshwar Rao

  • Dear Koteshwar 

    Greetings!

    I have not contacted you about this matter, but what happened after that?

    I ’m waiting for you to send me the LU test data .

    ISO7740FDW and ISO7740FDWR(SOIC  DW 16pin)

    Please reply to me.

    Thanks & Best regards,
    Tami Higasa

  • Hi Tami,

    ISO7740FDW (tube) and ISO7740FDWR (reel) refer to the same device and the device has been tested for Latchup and has passed ±100mA test, as also shown below. Let me know if you have any questions, thanks.

    Regards,
    Koteshwar Rao

  • Dear Koteshwar

    Good day!

    I saw the result of 【I-Test】.

    Are these two products tested in 【V-Test, Overvoltage Test】?

    If not, why?

    regards,
    Tami Higasa

  • Hi Tami,

    The LU test involves injecting current with the voltage clamped to a higher voltage. So yes, the device is also tested with voltage clamped to higher levels as part of LU test. I hope that answers you question, thanks.

    Regards,
    Koteshwar Rao

  • Hi, Koteshwar

    Please tell me the results of [V-Test, Overvoltage Test].

    regards,
    Tami Higasa

  • Hi, Koteshwar

    I understand there are two types of Latch-UP tests.
    (1)V-Test, Overvoltage Test
    (2)I-Test

    The test methods are
    (1)V-Test, Overvoltage Test
       Check that latch-up does not occur with voltage pulses up to 1.5 times the power supply voltage.

    (2)I-Test
       Check that latch-up does not occur by injecting a current pulse of +/-100mA.

    The information provided initially is +/-100mA, so I think it refers to "(2)I-Test".
    Therefore, I ask you to provide the test results of "(1)V-Test, Overvoltage Test".
    If "(1)V-Test, Overvoltage Tes"t has not been conducted, please tell me the reason.

    regards,
    Tami Higasa

  • Hi Tami,

    Not sure if I was clear enough in my previous response. The LU test does both current and voltage test at the same time where the voltage applied is 1.5 times higher than device rating and a current of ±100mA applied at the same time and device is monitored to check for latching up.

    The ISO7740 device doesn't latch-up under these test conditions and hence it has passed the LU test. ISO7740 has met both I-Test and V-Test with overvoltage as part of LU test. Hope this answers your question, thanks.

    Regards,
    Koteshwar Rao

  • Hi, Koteshwar

    Greetings!

    Thanks for telling me about the test results!

    I understood the details and was convinced.

    Thanks & Regards,

    Tami Higasa