Specifications

• High-Precision DS3231 RTC IC – Maintains accurate date and time with an integrated temperature-compensated crystal oscillator (TCXO), providing significantly improved accuracy over standard RTC modules.

• Built-in AT24C32 EEPROM (32Kbit) – Includes onboard non-volatile EEPROM memory for storing configuration data, calibration values, logs, or application parameters.

• I²C Serial Communication Interface – Standard I²C interface enables easy communication with microcontrollers and embedded systems using only SDA and SCL lines.

• 3.3V & 5V Logic Compatible – Operates with both 3.3V and 5V systems, making it suitable for a wide range of development platforms and embedded applications.

• Battery Backup Support – Equipped with a CR2032 coin cell holder to maintain accurate timekeeping during main power interruptions. (Battery not included, unless supplied separately.) 

• Integrated Calendar & Clock – Maintains seconds, minutes, hours, day, date, month, and year with automatic leap-year compensation.

• Programmable Square-Wave Output (SQW) – Provides selectable square-wave output frequencies for timing and clock generation applications.

• 32KHz Clock Output – Dedicated 32KHz output pin available for precision timing and clock reference applications.

• Power Status Indicator – Onboard LED indicates module power for easy operation and troubleshooting.

• Compact PCB Design – Small form factor with standard header pins for easy integration into breadboards, development boards, and embedded systems.

• Factory Assembled & Tested – Fully assembled and electrically tested for reliable operation.

Applications

• Real-Time Clock (RTC) projects

• Data logging systems

• Digital clocks and calendars

• Industrial automation

• IoT devices

• Home automation systems

• Energy monitoring equipment

• Time-stamped sensor data recording

• Access control and attendance systems

• Embedded control systems

Technical Specifications