General Description

The  DS3231M  is  a  low-cost,  extremely  accurate,  I2C real-time clock (RTC). The device incorporates a battery input  and  maintains  accurate  timekeeping  when  main power  to  the  device  is  interrupted.  The  integration  of the  microelectromechanical  systems  (MEMS)  resona

tor enhances the long-term accuracy of the device and reduces  the  piece-part  count  in  a  manufacturing  line. The DS3231M is available in the same footprint as the popular DS3231 RTC.

Features

• Timekeeping Accuracy Q5ppm (Q0.432 Second/Day) from -40NC to +85NC

• Battery Backup for Continuous Timekeeping

• Low Power Consumption

• Footprint and Functionally Compatible to DS3231

• Complete Clock Calendar Functionality Including Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Up to Year 2100

• Two Time-of-Day Alarms

• 1Hz and 32.768kHz Outputs

• Reset Output and Pushbutton Input with Debounce

• Fast (400kHz) I2C-Compatible Serial Bus

• +2.3V to +5.5V Supply Voltage

• Digital Temp Sensor with Q3NC Accuracy

• -40°C to +85°C Temperature Range

• 8-Pin or 16-Pin SO (300 mils) Packages

• Underwriters Laboratories (UL) Recognized