DS3231 vs DS1307?
TL;DR: the DS3231 has higher precision than DS1307.
The main difference between the DS3231 and DS1370 is the accuracy of time-keeping.
- The DS1307 comes with an external 32kHz crystal for time-keeping whose oscillation frequency is easily affected by external temperature. This usually results with the clock being off by around five or so minutes per month.
- The DS3231 is much more accurate, as it comes with an internal Temperature Compensated Crystal Oscillator(TCXO) which isn’t affected by temperature, making it accurate down to a few minutes per year at the most.
The DS1307 is still a great value RTC and suitable for normal projects. The DS3231 is highly recommended for projects that require more accurate time-keeping.
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