The DS3231 also has an internal crystal.
But the tolerance is +/-2 PPM, which is about 1 minute / year.
DS3231 - Extremely Accurate I²C-Integrated RTC/TCXO/Crystal
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4627/t/al
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The DS3231 also has an internal crystal.
But the tolerance is +/-2 PPM, which is about 1 minute / year.
DS3231 - Extremely Accurate I²C-Integrated RTC/TCXO/Crystal
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4627/t/al
<br>
DT
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