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OP07C: Lead Shape

Gina Capon
Prodigy 40 points

Part Number: OP07C

I have parts purchased from Digi-Key with the above part number and would like to know about the design/shape of the leads on this particular part number and package type (DIP). I see in the dimensions diagram, they are pictured as the parts I have. However, often the drawing does not depict every option for lead shape. I would like to know if this specific part number was ever made with any other DIP lead shape. I attached photos for reference of both lead options. I already contacted Digi-Key and was told to contact TI directly.I already spoke with your tech support team as well and was told to inquire with people who would know more about it. Thank you.

  • 0
    TI__Guru* 93105 points

    Hello Gina,

    The OP07C in the 8-pin P package (R-PDIP-T8) has been produced by TI for close to four decades. Certainly in that time the product has been produced at TI's various assembly locations. Often, the lead frame used for a package type is sourced by the particular assembly operation producing the product and it may differ somewhat from one used by another assembly location. But in any case they must conform with the package dimension criteria specified for the product package type. In the case of the R-PDIP-T8 the dimensions are provided in Mechanical Data specification:

    www.ti.com/.../mpdi001b.pdf

    The drawing provides the critical dimensions and variations are permitted providing they are within the ranges specified.

    Package lead finishes have  changed across the years. Up to about 15 years ago the lead finish was typically PbSn, but that was replaced by the more green friendly NiPdAu (Pb free) finish used for most TI products today. These finishes do have different appearances and do require different solder alloys for proper PC board soldering.

    Regards, Thomas

    Precision Amplifiers Applications Engineering

  • 0 in reply to Thomas Kuehl
    Prodigy 40 points

    Thomas,

    Thank you so much for your detailed response. I have an additional question about the assembly location for this part number. Between 2005-present, were these only assembled in the highlighted locations or are there other sites not listed?

  • 0 in reply to Gina Capon
    Prodigy 40 points

    This document lists 5 assembly codes that mean Malaysia. Is this specific to parts that were originally produced by National Semi? The PCN specific to my parts (OP07CP) states that the site code for Malaysia is "K" so I just want to make sure I am reading the top marking on the parts correctly.

  • 0 in reply to Gina Capon
    TI__Guru* 93105 points

    Hello Gina,

    The e2e support we provide is primarily focused on electrical circuit subjects for the Precision Amplifier products, and I don't have access to TI's detailed product assembly information. But I will try to assist as best as I can with your package questions.

    I do find that not only TI, but National Semiconductor have produced the OP07CD. I have no information about the OP07CD product produced during the National Semiconductor era. If the devices you have do have the NS logo on them, then it stands to reason that the Application Report shown above listing 5 letters that represent a Malaysia assembly facility would apply to your devices.

    As for OP07CD product produced by TI it appears that they are being assembled in Mexico so the TI code letter "M" should appear on them. I don't think you will find any recently produced TI OP07CD devices with a different assembly location code. 

    Regards, Thomas

    Precision Amplifiers Applications Engineering

  • 0 in reply to Thomas Kuehl
    Prodigy 40 points

    Thomas,

    Your statement below:

    "I do find that not only TI, but National Semiconductor have produced the OP07CD. I have no information about the OP07CD product produced during the National Semiconductor era. If the devices you have do have the NS logo on them, then it stands to reason that the Application Report shown above listing 5 letters that represent a Malaysia assembly facility would apply to your devices."

    Was that meant to say the NS Application Report would NOT apply?

    Also, you refer to part number: OP07CD --- I am asking only about OP07CP

  • 0 in reply to Gina Capon
    TI__Guru* 93105 points

    Hello Gina,

    Just a mistype on my part; I meant OP07CP. It is produced by TI, and was produced by National Semiconductor.

    The SNOA039C Application Report indicates the codes are for the National Semiconductor assembly plant contractors, which were set up independently from TI before they were part of TI. Therefore, the marking codes they assigned are different from those used by TI. If the devices you have were produced by National, then the Application Report should provide you what you need.

    This looks like the extent of information I can provide.

    Thomas

    Precision Amplifiers Applications Engineering

  • 0 in reply to Gina Capon
    TI__Guru 65866 points

    Gina,

    Yes. National did briefly produce an OP-07 in the early 90’s.

    There were 3 OP-07 PN’s:

    OP07EP -  75uV Max

    OP07CP  - 150uV Max

    OP07DP  - 150uV Max

    “N” was Nationals designation for plastic DIP-8, but “P” was used for ordering cross compatibility (National did not have a “P” package).

    They were in the 8-pin Plastic DIP, National drawing # N08E. Which is equivalent to the current  TI "P" package (Download). Because these were two packages by two different companies using two different lead frames and molds, there are physical differences - but they will all fit in the same socket.

    They would have been assembled in Malacca, Malaysia at the time - so the code is correct.