DS3231 RTC Module I2C Real Time Clock with CR2032 Battery Holder

The DS3231 RTC Module is a highly accurate I2C Real Time Clock module based on the DS3231 chip, featuring a built-in temperature-compensated crystal oscillator (TCXO) for exceptional timekeeping precision. With an onboard CR2032 coin cell battery holder, it maintains accurate time even when the main power is disconnected — making it essential for Arduino, Raspberry Pi, and embedded system projects.

Key Features:

• DS3231 high-accuracy RTC IC with built-in TCXO
• I2C interface (SDA, SCL) — easy to connect to any microcontroller
• Onboard CR2032 coin cell battery holder for backup power
• Pins: SQ, DS, SCL, SDA, VCC, GND, BAT (both sides)
• Accuracy: ±2ppm from 0°C to +40°C
• Tracks seconds, minutes, hours, day, date, month, and year
• Automatic leap year compensation up to year 2100
• 3.3V and 5V compatible
• Compact blue PCB with gold-plated pads

Specifications:

• IC: DS3231
• Interface: I2C (400kHz)
• Supply Voltage: 3.3V – 5.5V
• Accuracy: ±2ppm (0°C to +40°C)
• Battery: CR2032 (not included)
• Pins: SQ, DS, SCL, SDA, VCC, GND, BAT
• PCB Color: Blue

Never lose track of time in your project — the DS3231 RTC module keeps ticking accurately even through power cuts, resets, and long idle periods.