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chip pin problem — Parallax Forums

chip pin problem

VladimirVladimir Posts: 64
edited 2006-04-19 02:24 in BASIC Stamp
hi guys, this might not be related to BASIC Stamp, but since I am using it to make one (MAX232), here the thing i cannot figure out:

As I know, if a chip contains a hole on the side, it means that there is a pin # 1, but thats only in DIPs, i have SS

I've attached a picture, pins labeled with letters. Please respond, if you know, what letter is a correct pin. Something like, "A = 1, B = 2, etc"

Thanks

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Thanks,

Vladimir
DSC00252-1.jpg
351 x 268 - 20K

Comments

  • Jon WilliamsJon Williams Posts: 6,491
    edited 2006-04-19 02:00
    This is one of those "Google is your friend..." postings.· To prove it, I went to Google and entered this text into the search field

    max232 +ti

    The first document presented is this one: http://focus.ti.com/lit/ds/symlink/max232.pdf and you'll find the answer on page 11; I can't tell you because you provided an low-res image and the marking on that chip is quite subtle -- though I believe it may be pin P.

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    Jon Williams
    Applications Engineer, Parallax
  • VladimirVladimir Posts: 64
    edited 2006-04-19 02:01
    thanks a lot, i didn't think of that... sry for low res. pic

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    Thanks,

    Vladimir
    ·
  • Jon WilliamsJon Williams Posts: 6,491
    edited 2006-04-19 02:02
    Look at the chip from the end; the pin 1 side is angled.

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    Jon Williams
    Applications Engineer, Parallax
  • VladimirVladimir Posts: 64
    edited 2006-04-19 02:07
    the .pdf document does not say which way its reading, up or down. (On both of my computers the image apprears to be pretty large when you click on it)

    i uploaded the image on geocities

    http://www.geocities.com/vze4p6c2/DSC00252-1.jpg

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    Thanks,

    Vladimir
    ·
  • VladimirVladimir Posts: 64
    edited 2006-04-19 02:16
    i dont know which one is angled, they all look the same.

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    Thanks,

    Vladimir
    ·
  • Paul BakerPaul Baker Posts: 6,351
    edited 2006-04-19 02:20
    Jon is talking about the package and not the pins themselves, the side pin 1 is on has a more pronounced sloping on the plastic packaging. If you arrange the package so that the sloped side is facing left, pin 1 is in the upper left. It is hard to tell from the photo, but it appears the pin you labeled P is pin 1.

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    1+1=10
  • VladimirVladimir Posts: 64
    edited 2006-04-19 02:24
    ok, i got it now... Sry, im nooby.. Thanks a lot Paul

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    Thanks,

    Vladimir
    ·
  • Paul BakerPaul Baker Posts: 6,351
    edited 2006-04-19 02:24
    no problem.

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    1+1=10
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