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Original question:

AM3352: POH and reliability questions

AM3352: POH on different temperature range product

Tsurumoto
Genius 15234 points
Part Number: AM3352

Hi

I'm referring to Table5-1 in

https://www.ti.com/lit/ds/symlink/am3352.pdf

Customer are interested in POH for AM3352BZCZA60 and AM3352BZCZT60 .

The temperature range for A is -40~105C, and it for T is -40~125C.

And, Table5-1 says as below.

Table5-1 says that, POH for AM3352BZCZA60 with 105C is 100K.

But, it doesn't say anything about POH for AM3352BZCZT60 with 105C.

It only say about POH for AM3352BZCZT60 with 125C.

What customer would like to know if POH for  both AM3352BZCZA60 and AM3352BZCZT60 are

same at the same condition (OPP, temperature range).

Thanks and Best regards,

HaTa.

  • 0
    TI__Mastermind 27975 points

    From Datasheet figure 8-1, you will see that the temperature grades have Commercial, Extended, Industrial, and Industrial Extended names in the parenthesis.  These names tie to the headers in table 5-1 that you included in your post. 

    You can now see that temperature grade T (Industrial Extended) has a reduced POH compared to temperature grade A (Extended).

    I have requested that the next release of the AM335x datasheet include the speed grade letters in the headers of table 5-1.

    --Paul 

  • 0 in reply to PaulM
    TI__Genius 15234 points

    Hi Paul

    Yes, your right. The names at Figure8-1 and table5-1 could be tied each other.

    However, I cannot understand why POH are affected by the device grades.

    Because I believe POH should be related to temperature and not device grades.

    I'm referring below also.

    https://e2e.ti.com/support/processors/f/791/t/596032?tisearch=e2e-sitesearch&keymatch=POH

    https://www.ti.com/lit/an/sprabx4b/sprabx4b.pdf?ts=1606785388256

    Therefore, I'd like to request you to confirm if the POH value in DM table5-1 indicates for 90℃/105℃/125℃ and not 

    for each device grades.

    I assume that POH for  both AM3352BZCZA60 and AM3352BZCZT60 are same at the same condition (OPP, temperature range).

    Thanks and Best regards,

    HaTa.

  • 0 in reply to Tsurumoto
    TI__Mastermind 27975 points

    Table 5-1 provides the POH values for a device running at the stated max Tj   

    The temperature grade options (Commercial, Industrial, extended, and Extended Industrial) provide options to customers to purchase the correct part for their end use case.

    Grades A and T are not equal. Grade A has a maximum Tj of 105C but grade T has a maximum Tj of 125C.   Grade A should NOT be operated with a Tj above 105C.

    Now, if you limit the Tj of grade T to 105C, then you should see the same POH numbers. However, there would be no point in using grade T if the intent was to limit the Tj to that of grade A.

    --Paul

  • 0 in reply to PaulM
    TI__Genius 15234 points

    Hi Paul

    >However, there would be no point in using grade T if the intent was to limit the Tj to that of grade A.

    Yes, your comment is definitely correct. I cannot publish the details but customer need that information.

    >if you limit the Tj of grade T to 105C, then you should see the same POH numbers. 

    It's what we'd really like to know. Thanks a lot. 

    Thanks and Best regards,

    HaTa.