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LMV324: What is the reason of Ios (Output short-circuit current) typical value changing?

Kazuya Nakai59
Guru 21845 points
Part Number: LMV324


 Hello guys,

 One of my customers has been using LMV324IDR for a long time.

In last year, Ios (Output short-circuit current) typical value in the device datasheet was changed from 160mA and 60mA (SLOS263W) to 40mA (SLOS263X).

 They have a questions about the changing. Could you please give me your reply?

 Q1. What is the reason of Ios typical value changing?

 Q2. Is the current device internal chip same as before?

        In other word, was the internal chip changed when Ios typical vale was changed?

 Your reply would be much appreciated.

 Best regards,

 Kazuya. 

  • 0
    TI__Guru**** 167546 points

    Kazuya-san,

    The data sheet changes do strongly suggest a die replacement. It would be reasonable to think that. Yes, the changes are for that reason. For LMV324IDR, that die change has not happened yet. How can I help your customer prepare for this change?

  • 0 in reply to Ron Michallick
    Guru 21845 points

     Hello Ron,

     Thank you very much for your reply.

     I got the PCN(Product Change Notice, No.20200715000) for the data sheet changing issued on July 21st 2020.

     According to the notice, the reason of change is "to accurately reflect device characteristics."

     Also it says that "there are no changes to the actual device."

     Do you mean that LMV324IDR internal chip will be replaced with new one in near future 

    and an additional PCN for this device will be issued for the chip change in near future at the timing?

     Thank you again and best regards,

     Kazuya.

  • 0 in reply to Kazuya Nakai59
    TI__Guru**** 167546 points

    Kazuya,

    There was a PCN for some of the other part numbers (not the IDR) sent 2019 (end of year) that has fab and process change. There likely be will a PCN in the future for IDR. I don't know the timing or even if it is certain. Considering the date of the other PCN being end of 2019, it looks like things are moving slow. Please contact TI PCN support for a more accurate answer (their email is on the PCN front page). 

    The IOS change is actually a good thing. The old value is high because the part has no current limit circuit. The current is only limited by the strength of the output transistor; therefore shorts are more stressful. The new die current is lower because there is active current limiting to help protect the device from accidental shorts.

  • 0 in reply to Ron Michallick
    Guru 21845 points

     Hello Ron,

     Thank you very much for your reply. I could understand what you said well.

     Yes. I will contact TI PCN support team.

     Thank you again and best regards,

     Kazuya.