What is this SMT component with a little window, labeled A247L? (solved!)
What is this SMT component with a little window, labeled A247L? (solved!)
5 comments
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Okay, I think this is a passive crystal from Seiko-Epson. I've never seen one in this package.
Edit: https://www5.epsondevice.com/en/products/crystal_unit/fc135r.html
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Yup looking at the components around and the layout, it does look like a quartz crystal, especially considering it's right next to the microcontroller, and the 2 beige components above are the matching capacitors.
But yeah I've never seen a package with an open window. Maybe it's an ultra high precision that has been tuned with lasers (usually done for patch antennas).
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Interesting package, maybe @DavideAndrea@discuss.tchns.de knows more about it?
Edit, the tag somehow didn't work: https://discuss.tchncs.de/u/DavideAndrea