DS3231 RTC Module with EEPROM
Temperature-compensated real-time clock that stays accurate to about a minute a year, plus 4 KB of EEPROM. Keeps time on a coin cell when the power is off – for data loggers, alarms and timer
- RTC IC
- DS3231
- Accuracy
- ±2 ppm (0 to 40 °C)
- EEPROM
- AT24C32, 32 Kbit
- Interface
- I2C
- I2C Addresses
- 0x68 (RTC), 0x57 (EEPROM)
- Supply Voltage
- 3.3–5 V
Specifications
- Manufacturer Part Number
- DS3231
- RTC IC
- DS3231
- Accuracy
- ±2 ppm (0 to 40 °C)
- EEPROM
- AT24C32, 32 Kbit
- Interface
- I2C
- I2C Addresses
- 0x68 (RTC), 0x57 (EEPROM)
- Supply Voltage
- 3.3–5 V
- Backup Battery
- CR2032 / LIR2032 holder (battery not included)
- Extras
- 2 alarms, SQW/INT output, temperature sensor
- Board Size
- 38 × 22 mm
Description
Microcontrollers lose track of time when they reset. The DS3231 keeps counting seconds, minutes, hours, date, month and year on its own coin cell, and its built-in temperature-compensated crystal makes it far more accurate than the older DS1307.
Features
- DS3231 RTC with integrated TCXO: ±2 ppm from 0 to 40 °C (about ±1 minute per year)
- Two programmable alarms and a square-wave / interrupt output
- Built-in temperature sensor (±3 °C)
- AT24C32 EEPROM – 32 Kbit (4 KB) for settings or logs
- I2C interface: RTC at 0x68, EEPROM at 0x57
- 3.3–5 V supply, CR2032 battery holder
Battery note
Coin cell not included. This common module has a trickle-charge circuit meant for a rechargeable LIR2032. If you use a normal CR2032, remove the small charging resistor (or diode) next to the battery holder – a quick search for 'DS3231 ZS-042 charging resistor' shows which one.
Package includes
1 × DS3231 RTC module (battery not included)