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  • #1

    SMD IC orientation

    How do we find pin 1 on a SMD chip with no dot or end notch? Can we assume pin 1 is at the lower left with respect to designation printing?

    Click image for larger version Name: 001.JPG Views: 614 Size: 142.6 KB ID: 937960 Click image for larger version Name: 003.JPG Views: 530 Size: 205.3 KB ID: 937961
    It's weird, because it WAS working fine.....
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  • #2
    Originally posted by Randall View Post
    How do we find pin 1 on a SMD chip with no dot or end notch? Can we assume pin 1 is at the lower left with respect to designation printing?
    Can you see a slightly beveled edge on one side of the package? That's the pin 1-4 side.
    It looks like the bottom edge on your pictures so pin 1 would be bottom left.
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    • #3
      Click image for larger version Name: Untitled.jpg Views: 387 Size: 11.3 KB ID: 937987
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      • #4
        Who needs glasses when you see things we donīt?
        Juan Manuel Fahey

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        • #5
          Click image for larger version Name: IC pin1 chart.png Views: 435 Size: 70.5 KB ID: 938041
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          • #6
            Originally posted by Dave H View Post
            Click image for larger version Name: IC pin1 chart.png Views: 435 Size: 70.5 KB ID: 938041
            Is this industry standard or just NTE?
            Thanks,
            nosaj
            soldering stuff that's broken, breaking stuff that works, Yeah!

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            • #7
              Is this industry standard or just NTE?
              It''s the standard. Pin 1 is the lower left corner when facing correctly what's printed on the IC.
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