On 3/14/17 12:19 AM, Chris Albertson wrote:
I think what he means is that the typical device sold today has four
terminals not two. It looks like a crystal because it is inside a
little silver can but has four lead wires Power, ground and "output"
and the fourth lead might not be used. It is an "XO" not an "X".
But I argue that every one of these device has a crystal inside. So
they still make crystals, just you don't see them
A lot of those have micromachined silicon as the resonator, though
http://www.silabs.com/products/timing/oscillators/xo-silicon
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