• State TI Thinks Resolved
  • Locked Locked
  • Replies 5 replies
  • Answers 1 answer
  • Subscribers 47 subscribers
  • Views 387 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM193QML: Can you suggest the meaning of "R" which is the marking of LM193AJRQMLV

Icgoo Icgoo
Intellectual 280 points
Part Number: LM193QML
Other Parts Discussed in Thread: LM193

Hello,

We purchesed the part of LM193AJRQMLV many times. The letter R was not included in the marking of the parts I ordered before, but this time it arrives with the letter R, please help explain the reason.

Thanks a lot,

Gloria.

  • 0
    TI__Guru 54966 points

    Hello Icgoo,

    What exact part number were you ordering in the past?

    The "R" denotes 100krad radiation testing.

  • 0 in reply to Paul Grohe
    Intellectual 280 points

    The  exact part number we ordering in the past is also LM193AJRQMLV, but there is no letter 'R'.

    Can you help to suggest the reason for the difference?

    Thank you.

  • 0 in reply to Icgoo Icgoo
    TI__Guru 54966 points

    Hello Icgoo,

    Do you have any photos of the top of the non-R devices?? Or photos of the labels?

    If you ordered a LM193AJRQMLV, the marking on the top should be the same (LM193AJRQMLV).

    The non-R devices should have a dash "-" in place of the R (LM193AJ-QMLV). There is not a valid part number such as LM193AJQMLV (no R or dash).

  • 0 in reply to Paul Grohe
    Intellectual 280 points

    Hello Paul,

    I think you misunderstood me, I didn't mean R in the part number, but R in the middle of the first line of the marking.

  • 0 in reply to Icgoo Icgoo
    TI__Guru 54966 points

    Hello Icgoo,

    Apologies for the confusion. I see it now.

    The ink-stamped "R" usually means that the device was re-screened or re-tested.

    In this case, these devices were 100% X-Ray re-screened for seal voids per GIDEP CE9-P-23-01A. This was done for pretty much all CDIP-8 devices within a date code range and not just specific to the LM193.

    GIDEP's can be retrieved from this site (requires registration):

    https://www.gidep.org/products/database.htm