SPECIFICATIONS

1-20PCS DS3231MZ SOIC-8 DS3231MZ+TRL DS3231M I2C DS3231 MZ Real-time Clock

±5ppm, I2C real-time clock with integrated MEMS resonator temperature conditioning RTC, effectively reducing the risk of mechanical failure of the crystal

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-compensated voltage reference and comparator 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