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Datasheet
High-Accuracy I2C Real-Time Clock IC with Integrated Crystal and Temperature-Compensated Oscillator
The DS3231SN#T&R is a highly accurate real-time clock (RTC) IC that integrates a temperature-compensated crystal oscillator (TCXO) and crystal within a single package. Developed by Analog Devices (formerly Maxim Integrated), this RTC provides precise timekeeping with minimal external components, making it suitable for embedded systems that require reliable long-term time accuracy. The device communicates through a two-wire I2C serial interface, allowing easy integration with microcontrollers and digital systems.
The IC maintains tracking of seconds, minutes, hours, day, date, month, and year, including automatic adjustment for leap years. It also includes programmable alarms, a square-wave output, and a digital temperature sensor used to compensate the oscillator frequency for improved accuracy. With battery backup capability and low power consumption, the DS3231SN is widely used in applications such as data loggers, industrial controllers, IoT devices, and time-sensitive embedded systems.
Key Features
- Integrated Crystal and TCXO – Provides high-accuracy timekeeping without requiring an external crystal.
- Real-Time Clock and Calendar – Tracks seconds, minutes, hours, day, date, month, and year with leap-year correction.
- I2C Two-Wire Serial Interface – Enables communication with microcontrollers using a standard I2C bus.
- Temperature-Compensated Accuracy – Internal temperature sensor adjusts oscillator frequency for improved precision.
- Programmable Alarm Functions – Supports time-based alarm events for system control.
- Square-Wave Output – Provides programmable clock output for timing applications.
- Battery Backup Support – Maintains timekeeping during power interruptions.
- SOIC-16 Package – Suitable for robust and reliable PCB assembly.
