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particle-iot / core

Hardware design files for the Spark Core, a tiny Wi-Fi development kit.
https://www.spark.io/
Creative Commons Attribution Share Alike 4.0 International
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Reduce size of 8Mhz crystal #9

Closed zsup closed 11 years ago

zsup commented 11 years ago

We're looking to save some space on the Core, so let's find a 8Mhz crystal with a smaller footprint than the one we're currently using.

zsup commented 11 years ago

Right now we're using a 5mm x 3mm footprint, it looks like the next step down (and possibly the only step down) is a 3mm x 2.5mm (3225) footprint:

http://item.taobao.com/item.htm?spm=a230r.1.14.12.1n6Uvy&id=15154999189 http://www.digikey.com/product-detail/en/NX3225GD-8MHZ-STD-CRA-3/644-1178-2-ND/3125637

zsup commented 11 years ago

Whoops, turns out the footprint for that DigiKey one isn't quite right. It should be a 4-pad footprint. See this: http://www.digikey.com/product-detail/en/ABM8-26.000MHZ-10-1-U-T/300-8230-2-ND/687841

It doesn't seem that DigiKey has a 3225 8Mhz crystal, but they are all over Taobao, so they will be available in China for manufacturing