I am using TXC 7B 16.0 mghz crystal for my design. I just received photo proofs from my PCB assembly house and it appears they soldered this crystal 180.0 degrees reversed.


Edit: the real datasheet

  • 1
    \$\begingroup\$ I don't see any polarity. \$\endgroup\$
    – Eugene Sh.
    Oct 25, 2017 at 13:46
  • \$\begingroup\$ What specification did you give for the package orientation? Or would it just look better with the label the other way round? \$\endgroup\$ Oct 25, 2017 at 13:51

1 Answer 1


No, the polarity does not matter.

Crystals do not have a polarity.

Watch out with Crystal oscillators in a similar housing though (also 4 pins) as their polarity does matter.

But since this is a crystal only (no oscillator) polarity does not matter. It will work mounted either way. I speak from experience with similar crystals from the same manufacturer.


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