DS3231M Datasheet | Maxim Integrated

±5ppm, I2C Real-Time Clock General Description The DS3231M is a low-cost, extremely accurate, I2C realtime 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) resonator enhances the long-term accuracy of the device and reduces the piecepart count in a manufacturing line. The DS3231M is available in the same footprint as the popular DS3231 RTC. The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator. Two programmable time-ofday alarms and a 1Hz output are provided. Address and data are transferred serially through an I2C bidirectional bus. A precision temperature-pensated voltage reference and parator circuit monitors the status of VCC to detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the RST pin is monitored as a pushbutton input for generating a microprocessor reset. See the Block Diagram for more details. Applications Power Meters Industrial Applications Ordering Information PART TEMP RANGE PIN-PACKAGE DS3231MZ+ -45NC to +85NC 8 SO DS3231MZ/V+ -45NC to +85NC 8 SO DS3231M+ -45NC to +85NC 16 SO +Denotes a lead(Pb)-free/RoHS-pliant package. /V denotes an automotive qualified part. Benefits and Features - - Highly Accurate RTC With Integrated MEMS Resonator pletely Manages All Timekeeping Functions - plete Clock Calendar Functionality Including Seconds, Minutes, Hours, Day,...