The DS3231 RTC Module 3.3V 5V Precise with Battery is an extremely accurate real-time clock board designed for time-critical embedded applications. 3.3V to 5.5V DC (compatible with 3.3V and 5V microcontrollers) · Standard I2C serial bus (SDA, SCL) operating at 400kHz.
The DS3231 RTC Module 3.3V 5V Precise with Battery is an extremely accurate real-time clock board designed for time-critical embedded applications. Unlike standard RTCs that drift over time due to temperature fluctuations, the DS3231 integrates an internal temperature-compensated crystal oscillator (TCXO) and crystal, maintaining timekeeping accuracy within a few seconds per year.
Equipped with a coin cell battery backup holder (CR2032/LIR2032), the module maintains seconds, minutes, hours, day, date, month, and year information—including leap year compensation—even when main power is disconnected. It features two programmable time-of-day alarms, a configurable square-wave output signal, and an onboard AT24C32 EEPROM providing 32Kb of non-volatile memory storage.
Communicating over a standard I2C bus (SDA, SCL), the board operates seamlessly at both 3.3V and 5V logic levels, making it ideal for data logging, digital clocks, automated scheduling systems, and timer relays. It is fully compatible with Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and general DIY electronics.
| Core Controller IC | Maxim DS3231 High-Precision Real-Time Clock IC |
|---|---|
| Integrated Oscillator | Temperature-Compensated Crystal Oscillator (TCXO) and crystal |
| Operating Voltage | 3.3V to 5.5V DC (compatible with 3.3V and 5V microcontrollers) |
| Interface Bus | Standard I2C serial bus (SDA, SCL) operating at 400kHz |
| Timekeeping Accuracy | ± 2ppm accuracy from 0°C to +40°C (approx. ± 1 minute per year) |
| Backup Battery | Onboard coin cell battery holder for power-off time retention |
| Additional Memory | Onboard AT24C32 EEPROM (32Kb / 4KB non-volatile storage) |
| Alarm & Signal Features | 2 programmable time-of-day alarms & configurable square-wave output (1Hz, 4.096kHz, 8.192kHz, 32.768kHz) |
What is the operating voltage?
3.3V to 5.5V DC (compatible with 3.3V and 5V microcontrollers).
Which interface does it use?
Standard I2C serial bus (SDA, SCL) operating at 400kHz.
Is it compatible with Arduino and ESP32?
Yes. It works with Arduino, ESP32, ESP8266, Raspberry Pi projects.
Can I buy the DS3231 RTC Module 3.3V 5V Precise with Battery in Kanpur?
Yes – buy online with delivery across India, or pick it up from the iTechBuilders store, Damodar Nagar, Kanpur.
