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I want to purchase 20 MHz ATtiny85 chips in SOIC-8 on a full reel from Mouser. I found these two variants:

I have studied the specifications but cannot for the life of me find the difference between the two, and I don't want to order a full reel of the wrong part if there is any difference between them. Does anyone know?

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On page 13 of the datasheet, you can see the Order codes and what they mean.

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In this case, H and U mean the finish or plating on the pins.

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From the datasheet, page 11:

  1. Code indicators: H = NiPdAu lead finish, U/N = matte tin, R = tape & reel.
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