DFRobot Fermion: SD3031 Precision RTC Module for Arduino (Breakout)

This real-time clock (RTC) module uses theDFRobot Fermion SD3031 chip, which has an integrated crystal oscillator and temperature compensator. This provides high-precision timing and stability. At a temperature of 25 °C, the accuracy is maintained at ±3.8ppm (±0.32832 seconds/day). The SD3031 can be powered by button-cell batteries. This allows for accurate timing even when the main power source is interrupted. The RTC keeps track of seconds, minutes, hours, days of the week, dates of the month, months, and years. It also automatically adjusts the date at the end of each month and includes leap year corrections. The DFRobot Fermion: SD3031 Precision RTC has a built-in 70-byte SRAM for low-power data storage. Please note that due to recent air cargo regulations, special items such as batteries, magnets, and liquids are strictly audited for air transport. As a result, the RTC module does not come with batteries. You will need to purchase them locally. The button cell model that is compatible with this module is the CR1220. Applications: Event Reminder Countdown Devices MCU External Wake-up Source Clock & Alarm Output IoT Data Collection & Storage Features: Low power consumption, operating current of only 1.8µA when powered by a button cell battery High precision, ±3.8ppm@25℃ Integrated temperature compensator, small temperature drift Readable button cell voltage Built-in 70Byte SRAM Package Includes:1 x Fermion: SD3031 RTC module (Breakout)1 x 2.54-7P Black Single-row Pin Connector

Specifications

Supply Voltage	3.3V
I2C Address	0x32
SRAM	70 Byte (0x2C-0x71)
Timing Year Range	2000 - 2099
Operating Temperature	-10℃ to +70℃
Item Type:	Development Board
Board Type:	Fermion
Operating Temperature (°C):	-10℃ to +70℃
Timing Accuracy:	±3.8ppm @ 25℃
Overall Dimension	22.5x21mm/0.89x0.83"
Shipping Weight	0.008 kg
Shipping Dimensions	6 × 6 × 3 cm