DS3231 Real Time Clock Memory Module with Battery

Keep your projects perfectly on time with the DS3231 RTC module - a high-precision, temperature-compensated real-time clock with built-in EEPROM memory and included CR2032 backup battery. Ideal for data logging, alarm systems, IoT devices, and any application requiring accurate, persistent timekeeping even during power loss. Available now from The Engineer Store, Bengaluru with fast shipping and full technical support.

Specifications

Key Features

• Exceptional Accuracy: The DS3231's integrated TCXO delivers +/-2 ppm precision - roughly +/-1 minute drift per year - far superior to the DS1307 and other crystal-based RTC modules.
• Battery Backup Included: Ships with a CR2032 coin cell battery so the clock keeps running during power outages, maintaining accurate time for years on standby.
• Onboard 32KB EEPROM: The AT24C32 memory chip provides 4KB of non-volatile storage for data logging timestamps, calibration values, configuration settings, or small datasets.
• Built-in Temperature Sensor: Read ambient temperature directly from the DS3231 register - no additional sensor needed for environmental monitoring projects.
• Dual Programmable Alarms: Set two independent alarms with configurable triggers (by seconds, minutes, hours, or day/date match) with interrupt output for wake-up or event-driven applications.
• Universal I2C Interface: Simple 2-wire communication works seamlessly with Arduino, Raspberry Pi, ESP32, ESP8266, STM32, and virtually any microcontroller at 3.3V or 5V logic levels.
• Aging Trim Register: Fine-tune oscillator frequency digitally for even greater long-term accuracy without hardware modification.
• Low Power Consumption: Draws only ~3uA on battery backup, ensuring the CR2032 lasts several years maintaining timekeeping.
• Compact & Mountable: Small PCB footprint with four mounting holes makes integration into enclosures and project boxes straightforward.

Why Choose the DS3231 Over the DS1307?

• 50x More Accurate: The DS3231 uses an internal temperature-compensated oscillator (+/-2 ppm) versus the DS1307's external crystal (+/-20 ppm or worse), meaning dramatically less time drift.
• No External Crystal Required: The TCXO is built into the DS3231 IC, eliminating a common point of failure and sensitivity to temperature changes.
• Built-in Temperature Sensor: The DS1307 has no temperature sensing capability - the DS3231 gives you this as a bonus feature.
• Better Battery Life: Lower standby current means longer backup battery lifespan.
• Same Pinout & Libraries: Drop-in replacement in most circuits - same I2C address (0x68) and compatible with the same Arduino/Raspberry Pi libraries.

How to Connect - Wiring Guide

Frequently Asked Questions

Buy DS3231 Real Time Clock Memory Module with Battery Online in India

Purchase the DS3231 Real Time Clock Memory Module with Battery online at The Engineer Store - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on DS3231 Real Time Clock Memory Module with Battery with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.

Looking to buy DS3231 Real Time Clock Memory Module with Battery at the best price in India? The Engineer Store offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.