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Relationship b/w pin assignment figure and package outline figure

Ryuuichi machida
Guru 12650 points

Hi,

My customer confuse how they apply information of pin assignment to package outline.

The target decices are following two and could you please confirm whether following our understanding is correct or not ?

 Target device :

* SN74LVC2G00YZPR

* SN74LVC1G11YZPR

Is following understanding correct ?

Best Regards,

Machida

  • 0
    Guru 316780 points

    In the pin configuration drawings, "1" is the number of the pin; "1A" or "A" is the name of the pin.

    In the mechanical drawing, "A" and "1" are the coordinates of the ball in the ball grid array. These coordinates have nothing to do with either the number or the name; ignore them. (There is a ball with coordinates "C" and "2", but no such pin name or pin number.)

    All drawings are bottom view, so pin number "1" with name "A1"/"A" indeed uses the ball with coordinates "A" and "1". But this similarity is just by chance.

    Apparently, pin naming is inspired by the famous application note by Lewis Carroll:

    "Or else what?" said Alice, for the Knight had made a sudden pause.

    "Or else it doesn't, you know. The name of the song is called 'Haddocks' Eyes.'"

    "Oh, that's the name of the song, is it?" Alice said, trying to feel interested.

    "No, you don't understand," the Knight said, looking a little vexed. "That's what the name is called. The name really is 'The Aged, Aged Man.'"

    "Then I ought to have said 'That's what the song is called'?" Alice corrected herself.

    "No you oughtn't: that's another thing. The song is called 'Ways and Means' but that's only what it's called, you know!"

    "Well, what is the song then?" said Alice, who was by this time completely bewildered.

    "I was coming to that," the Knight said. "The song really is 'A-sitting On a Gate': and the tune's my own invention."

  • 0 in reply to Clemens Ladisch
    Guru 12650 points
    Hi Ladisch-san,

    Thank you for your reply.
    What we want to confirm is whether in the mechanical drawing, "A" and "1" corresponding to "1" (number of the pin) or not.
    Coud you please confirm it ?

    Best Regards,
    Machida
  • 0 in reply to Ryuuichi machida
    Guru 316780 points
    Yes; the number "1" and the coordinates "A"/"1" refer to the same pin.
  • 0 in reply to Clemens Ladisch
    Guru 12650 points
    Hi Ladisch-san,

    Thank you for your reply.
    >Yes; the number "1" and the coordinates "A"/"1" refer to the same pin.
    So, the following understanding is also correct ?

    * SN74LVC2G00YZPR
    Pin number : mechanical drawing
    1 : "A" and "1"
    2 : "B" and "1"
    3 : "C" and "1"
    4 : "D" and "1"
    5 : "A" and "2"
    6 : "B" and "2"
    7 : "C" and "2"
    8 : "D" and "2"

    * SN74LVC1G11YZPR
    Pin number : mechanical drawing
    1 : "A" and "1"
    2 : "B" and "1"
    3 : "C" and "1"
    4 : "A" and "2"
    5 : "B" and "2"
    6 : "C" and "2"

    Best regards,
    Machida
  • 0 in reply to Ryuuichi machida
    Guru 316780 points

    No, the pin numbers move around the outside in a circular fashion:

    '2G00:   '1G11:
1: A 1   1: A 1
2: B 1   2: B 1
3: C 1   3: C 1
4: D 1   4: C 2
5: D 2   5: B 2
6: C 2   6: A 2
7: B 2
8: A 2
  • 0 in reply to Clemens Ladisch
    TI__Expert 4555 points
    Hi Ladisch-san,

    Thank you for your reply.
    I understood and close it.

    BR,
    Machida