DS3231 ANALOG DEVICE RTC MODULE

Description

The DS3231 RTC Module is a high-precision real-time clock (RTC) module designed to keep accurate time and date tracking even when the main system power is turned off. It uses a temperature-compensated crystal oscillator (TCXO), making it far more accurate than standard RTC modules like DS1307.

It is widely used in microcontroller projects, data loggers, industrial controllers, PLC interfaces, IoT devices, and embedded systems where reliable timekeeping is required.

Key Features

• High-accuracy real-time clock (RTC) module
• Built-in temperature-compensated crystal oscillator (TCXO)
• Extremely stable timekeeping with low drift
• I2C communication interface (easy MCU integration)
• Battery backup support for time retention during power loss
• Automatic switching between main power and backup battery
• Integrated 32.768 kHz crystal (no external crystal required)
• Built-in calendar supports seconds, minutes, hours, day, date, month, year
• Leap-year compensation up to year 2100
• Low power consumption for battery-operated systems
• Optional onboard EEPROM (in some variants)

Specifications

• Product Type: Real-Time Clock (RTC) Module
• IC: DS3231 (Analog Devices / Maxim Integrated)
• Communication Interface: I2C (SDA, SCL)
• Operating Voltage: 3.3V – 5V DC
• Backup Battery: CR2032 coin cell
• Time Accuracy: ±2 ppm (approx. ±1 minute/year)
• Temperature Compensation: Yes (built-in TCXO)
• Calendar Support: 2000–2099
• Data Format: Binary-coded decimal (BCD)
• Operating Temperature: -40°C to +85°C
• Output: Square wave (optional programmable output)
• Module Type: PCB breakout board with pull-up resistors
• Application: Embedded systems, Arduino/ESP projects, data loggers, industrial timers, automation systems, IoT devices