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DS3231 Precision RTC Memory Module For Arduino

Low power consumption
Two calendar clock
Conversion, it is super convenient
1 Hz and 32.768 kHz output
Reset the output and input button to tremble
High speed (400 KHZ) the I2C serial bus
To provide continuous timing battery backup
The device compatible with DS3231 encapsulation and function
+ 2.3 V to + 5.5 V power supply voltage
- 40 ℃ to + 85℃ temperature range
The module itself can be adapted to 3.3 V and 5 V system, no level 
To 40℃ to + 85℃ temperature range, timing accuracy in a plus or minus 5 PPM (+/- 0.432 SEC/day)
Complete the clock calendar function including the second, minute, time, week, date, month, and year, and provide the valid until 2100 leap year
The accuracy of plus or minus 3℃ digital temperature sensor
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