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TL081: TL081C

Yasin Yigit
Prodigy 20 points
Part Number: TL081

Tool/software:

Hello Support Team,

For the past 20 years, we have used the TL081C in our electronic boards, with the known specifications for VOM max. 13.5V at a supply voltage of +/-15Vsup.

We noticed that the VOM value had changed and built  test circuit on page 24, Figure 6.2 with a gain of 2. With the same Vsup +/-15V, we now get approximately 15V at the output.

These values ​​do not correspond to the known specifications in the datasheet.

I have attached a picture of the component and a screenshot of our measurement results.

I would be very pleased to receive a prompt response.

Best Regards

Yasin Yigit

OLD TL081C

NEW TL081C

NEWTL081C

tl081_TI_seit 2024 June.pdf

NEW TL081C

  • 0
    TI__Guru 72681 points

    Hi Yasin, 

    TL081x product has issued PCN, see the link below. 

    https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/5488/PCN20230627002.1.pdf

    Yasin Yigit said:
    We noticed that the VOM value had changed and built  test circuit on page 24, Figure 6.2 with a gain of 2. With the same Vsup +/-15V, we now get approximately 15V at the output.
    Yasin Yigit said:
    These values ​​do not correspond to the known specifications in the datasheet.

    The TL081C in the new FAB has slightly different characteristics and the output voltage swing is closer to the supply rails than pre-PCN product. The output voltage swing has changed in the since SLOS081J datasheet back in Nov, 2020. 

    slos081j.pdf

    Prior to the SLOS081J datasheet back in Nov, 2020 (from 2015 to 2020 period), the Vout swing are ranged from ±12V (min.) to ±13.5V(typical) specified in SLOS081I's datasheet (published in May, 2015).

    If you have other questions, please let me know. 

    Best,

    Raymond

  • 0 in reply to Raymond Zhang1
    Prodigy 20 points

    Hello Raymond,

    Thank you very much for the quick response.
    I'm a bit confused, but I hope you can help me!

    a)

    In the PCN Number: 20220615003.1

    It is described that the TL081C module is still being produced in a new factory and no functional changes have taken place.

    /cfs-file/__key/communityserver-discussions-components-files/14/TXII_2D00_N_2D00_A0015980837_2D00_1.pdf

    b)

    In the PCN Number: 20230627002.1 july 27 2023

    Is not included the TL081C only the TL081HIDR

    /cfs-file/__key/communityserver-discussions-components-files/14/PCN20230627002.1.pdf

    c)

    In the latest data sheet since June 2024 in section 5.8 Electrical Caharacteristic describes explicit the C Type. And the Characteristic of the Output Voltage describes the same Value like the older Datasheets (NO CHANGE)

    /cfs-file/__key/communityserver-discussions-components-files/14/6862.tl081_5F00_TI_5F00_seit-2024-June.pdf

    d)

    Raymond you said:

    The TL081C in the new FAB has slightly different characteristics and the output voltage swing is closer to the supply rails than pre-PCN product. The output voltage swing has changed in the since SLOS081J datasheet back in Nov, 2020. 

    The screenshot you sent us is explicitly for the H Type and does not include the C Type.

    Please see the contents of my screenshot.

    Summary:

    We are currently very confused by the statements and contents of the datasheet.
    Our assembler is currently unable to supply our boards because the TL081C has different electrical properties than those stated in the datasheet.
    This is leading to a production stop, which is very unfortunate for us.
    We ask you to further investigate the origin of this discrepancy and why we are no longer receiving Type C that comply with the 2024 datasheet.

    Best Regards

    Yasin Yigit

  • 0 in reply to Yasin Yigit
    Guru 314190 points

    Typical values are not guaranteed. The datasheet does not specify a maximum output swing for the TL081, so a higher output swing is not considered a functional change.

    After the PCN, the TL081 uses the same die as the TL081H (with CMOS rail-to-rail outputs). The TL081H specifications are useful to see the actual typical values of the new die.

    TI does no longer ship old dies.

  • 0 in reply to Yasin Yigit
    TI__Guru 72681 points

    Hi Yasin,

    Please see Clemens's comments.  

    The new FAB in the post-PCN op amps are considered as the equivalent within the previous DC/AC performance specification prescribed in the datasheet. 

    If you have other questions, please let us know. 

    Best,

    Raymond 

  • 0 in reply to Raymond Zhang1
    Prodigy 20 points

    Hi Raymond,

    Thank you for your feedback and the information. Unfortunately, we are currently halting production due to this uncertainty.

    In oder to bring clarity to this difficult situation, we need your contiued support and would like to ask you to answer the following questions:

    1. Does the Change also apply to the I Type ?

    2. Is there a way to find out from the batch number which C type is produced in the new and which in the old factory?

    3. How can I understand/decode the code printed on the top side of the IC?

    I would be very grateful for a short feedback on all open points !!!

    Best Regards

    Yasin Yigit

  • 0 in reply to Yasin Yigit
    TI__Guru 72681 points

    Hi Yasin,

    Yasin Yigit said:
    1. Does the Change also apply to the I Type ?

    The following PCN link covers the listed op amp shown on the list, which I posted at the beginning of the reply. 

    file:///C:/Users/SammyA/Downloads/TXII-N-A0015980837-1.pdf

    Yasin Yigit said:
    2. Is there a way to find out from the batch number which C type is produced in the new and which in the old factory?

    Yes, if you provide the date code and lot number of the op amp package or shipping label, the information is traceable to a FAB type.

    Yasin Yigit said:
    3. How can I understand/decode the code printed on the top side of the IC?

    For instance, 37K refers to the op amp is manufactured in July, 2023, which is the RFAB or the post-PCN product.

    If you have other questions, please let me know. 

    Best,

    Raymond