The DS3231SN is a high-accuracy, low-power real-time clock (RTC) IC from Analog Devices, designed for applications that require reliable and precise timekeeping. It features an integrated temperature-compensated crystal oscillator (TCXO) and crystal resonator, helping maintain accurate time over temperature variations.

The RTC communicates through an I2C bidirectional serial interface and operates from a supply voltage of 2.3V to 5.5V. A dedicated battery input allows the device to continue maintaining time when the main power supply is interrupted.

The DS3231 maintains information including seconds, minutes, hours, day, date, month, and year. It automatically adjusts the date for months with fewer than 31 days and accounts for leap years.

With two programmable time-of-day alarms and a programmable square-wave output, the DS3231SN is suitable for embedded systems, IoT devices, industrial equipment, data loggers, meters, and other time-sensitive applications.

Key Features

• High-accuracy real-time clock (RTC) IC
• Integrated temperature-compensated crystal oscillator (TCXO)
• Integrated crystal resonator
• I2C bidirectional serial interface
• Wide supply voltage range of 2.3V to 5.5V
• Battery backup input for continuous timekeeping
• Supports 12-hour and 24-hour clock formats
• Automatic month-end date adjustment
• Automatic leap-year correction
• Two programmable time-of-day alarms
• Programmable square-wave output
• Maintains seconds, minutes, hours, day, date, month, and year
• 16-pin WSOIC package
• Operating temperature range of -40°C to +85°C
• Suitable for embedded and IoT applications

Accurate Timekeeping

The DS3231SN uses an integrated TCXO and crystal resonator to provide stable and accurate timekeeping. The device continuously tracks the current time and calendar information while automatically handling month lengths and leap years.

This makes it suitable for systems where accurate time and date information is required without relying on an external clock source.

Battery Backup Support

The dedicated battery input allows the RTC to continue operating when the primary system power is unavailable. This feature is useful for maintaining time and date information during power interruptions or when the main system is switched off.

I2C Communication

The DS3231SN# communicates with a microcontroller or processor through an I2C interface, providing a simple two-wire connection for reading and writing timekeeping data. This makes it easy to integrate into embedded systems and IoT hardware.

Applications

The DS3231SN can be used in a variety of electronic and embedded applications, including:

• IoT devices
• Embedded systems
• Data loggers
• Industrial automation systems
• Utility power meters
• GPS-related equipment
• Telematics systems
• Server and networking equipment
• Digital clocks and timers
• Access control systems
• Monitoring and measurement equipment
• Battery-powered electronics

Why Choose DS3231SN?

The DS3231SN RTC IC combines accurate timekeeping, temperature compensation, battery backup, I2C communication, and programmable alarms in a compact 16-pin WSOIC package. Its wide operating voltage range and reliable timekeeping make it suitable for a broad range of embedded, industrial, and IoT applications.