Peripherally relevant to the recent discussion about accurate wristwatches
I want to point out an interesting chip: Dallas/Maxim DS3231
This is a CMOS clock with built in 32.768 kHz X-tal and a couple of
neat tricks:
Every 64 seconds, it measures the temperature, and adjust the capacitive
The chip has 8 NC - No Connect pins... that must be connected to GND. What
will they think of next?
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To answer my own question... it's a ROHS lead-free device that contains lead!
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What will they think of next?
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