
Precision Real Time Clock Module DS3231 AT24C32 I2C
The Precision Real Time Clock Module DS3231 AT24C32 I2C keeps accurate date and time even after your project loses power, combining a temperature-compensated crystal oscillator (TCXO) with a 32KB AT24C32 EEPROM on one small board. Checking the DS3231 price in Bangladesh is worthwhile whenever a build needs timekeeping accurate to roughly two minutes per year instead of the drift-prone DS1307. Robotics teams, automation builders, and engineering students buy the DS3231 RTC module in Bangladesh for data loggers, timers, alarm systems, scheduled controllers, and clock displays on Arduino or ESP32. An onboard CR2032 battery holder lets the clock survive power cuts, while the I2C interface needs only two data wires.
Key Features:
• DS3231 TCXO real-time clock with ±2ppm accuracy (about ±1 minute per year)
• AT24C32 32KB I2C EEPROM on board for saving settings or small data logs
• CR2032 coin cell holder keeps time running through power outages
• Tracks seconds, minutes, hours, day, date, month, and year with leap-year logic
• Two programmable time-of-day alarms plus a 32kHz square-wave output
• Operates from 3.3V to 5.5V on a standard I2C bus
• Automatic battery switchover with built-in power-fail detection
Not sure it will work? Test your circuit free in Tekko Sim — on your phone, in Bangla or English.
| Category | Modules |
| Model no. | DS3231-AT24C32 |
| Availability | In stock |
| In stock | 5 pcs |
| Delivery | Cash on Delivery, nationwide Bangladesh |
| Main IC | DS3231SN high-precision RTC (integrated TCXO and crystal) |
| Memory IC | AT24C32, 32KB serial I2C EEPROM |
| Timekeeping Accuracy | ±2ppm from 0C to +40C (approximately ±1 minute per year) |
| Interface | I2C, up to 400kHz |
| I2C Address | 0x68 (DS3231), 0x57 (AT24C32) |
| Supply Voltage | 3.3V to 5.5V |
| Backup Battery | CR2032 coin cell (holder on board; battery may not be included) |
| Alarms | 2 programmable time-of-day alarms, INT/SQW pin |
| Additional Pins | 32.768kHz output, reset input |
| Timestamp Resolution | Seconds, with leap-year compensation valid up to 2100 |
| Operating Temperature | DS3231 rated -40C to +85C |
| Applications | Data loggers, schedulers, timed relays, clock displays, sunrise/sunset controllers |
| Compatible With | Arduino, ESP32, ESP8266, STM32, Raspberry Pi |
