DS3231M is a low-cost, high-precision I2C real-time clock (RTC). The device includes a battery input to maintain accurate timekeeping when the main power is disconnected. Integrated microelectromechanical systems (MEMS) improve the device's long-term accuracy and reduce the number of components on the production line. DS3231M uses the same device package as the popular DS3231�RTC.
The DS3231M is a low‑cost, high‑accuracy I²C real‑time clock (RTC) that includes a MEMS temperature sensor for compensation. It provides time and calendar data, 1 Hz and 32.768 kHz outputs, and a programmable square‑wave output. The device operates from 2.3 V to 5.5 V and works over a wide temperature range.
The document contains absolute maximum ratings, recommended operating conditions, detailed electrical characteristics, pin descriptions, and package information. It also lists typical current consumption for active and standby modes and timing parameters for the I²C interface. This manual is written in Chinese.
| Supply Voltage Range | 2.3 V to 5.5 V |
|---|---|
| Timekeeping Accuracy | ±0.432 s/day |
It can be powered from 2.3 V to 5.5 V.
The timekeeping accuracy is ±0.432 seconds per day.
The I²C bus can run up to 400 kHz in fast‑mode.