The DS3231 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) resonator enhances the long-term accuracy of the device and reduces the piece-part count in a manufacturing line.
The DS3231 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-of day 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.
Features:
- Timekeeping Accuracy ±5ppm (±0.432 Second/Day) from -45°C to +85°C
- Two-wire serial interface (I2C)
- Input Voltage: 5V
- Battery Backup for Continuous Timekeeping
- Two Time-of-Day Alarms
- Digital Temp Sensor with ±3°C Accuracy
Applications:
- Computer Peripherals
- Utility power meters
- Robotics
- Gaming
Pinout:
Pin | Function |
GND & VCC | Connects to GND & 5V |
SDA | Connects to I2C SDA |
SCL | Connects to I2C SCL |
SQW | 1Hz Square-Wave Output |
32K | 32.768kHz Output (50% Duty Cycle) |
Input Voltage | 2.3 ~ 5.5V |
VBAT Battery Voltage | 2.3 ~ 5.5V |
Interface | I2C (IIC) |
Slave Address | 0x68 (7bit), 0xD0 (8bit) |
SCL Clock Frequency | 400KHz (Max) |
Number of Pins | 6 (VCC,GND,SCL,SDA,SQW,32K) |
Product Dimensions | 38 x 22mm |
Operating Temperature | -45°C to +85°C |
Product Weight | 10 grams |
Country of origin : China
Note: The pins might be soldered but it depends on availability. Otherwise the Header pins will be provided separately in the package
1x DS3231 I2C Precision RTC Module
1x CR2032 Battery 3V