I have a part that looks like this under my microscope:
and it is a TPS22810 load switch (datasheet). But, how do I know which side is which?
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\$\begingroup\$ According to page 3, there is a dot, or an indentation above pin 1. Can you see or feel one? \$\endgroup\$– CrossRoadsFeb 7, 2019 at 18:26
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\$\begingroup\$ Feel? I can barely feel the part :-D And not even under the microscope I can see something, see picture... \$\endgroup\$– Raphael JegerFeb 7, 2019 at 18:27
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\$\begingroup\$ You might also be able to measure the body diode in the MOSFET between pins 1 and 6 (the 2 end pins), see page 15. \$\endgroup\$– CrossRoadsFeb 7, 2019 at 18:31
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3\$\begingroup\$ Usually when you orient the component so that you're looking at the top of it with the text right-side up, pin 1 is in the bottom left-hand corner. \$\endgroup\$– DerStrom8Feb 7, 2019 at 18:33
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1\$\begingroup\$ Yes. From 6 to 1. \$\endgroup\$– CrossRoadsFeb 7, 2019 at 18:33
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1 Answer
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The vertical bar on the left hand side of the part indicates the orientation. Therefore the pin 1 is located on the bottom left corner, and the pin 3 in the bottom right corner.
The text is always readable when the pin 1 is on the bottom left corner
The sequence is as follows:
6 5 4
1 2 3
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\$\begingroup\$ Thank you! Why don't they write that as-is in the diagram? :-D \$\endgroup\$ Feb 7, 2019 at 18:34
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\$\begingroup\$ "The text is always readable when the pin 1 is on the bottom left corner" just wanted to point out that this isn't true for all parts, just in case people thought it was \$\endgroup\$– BeB00Feb 7, 2019 at 22:11