DS3231 is a low-cost, extremely accurate I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The Module adds timestamp and event scheduling information to your microcontroller projects. This module generates seconds, minutes, hours, days, dates, months, and years, and provides timekeeping until 2100 while compensating for leap years. DS3231 incorporates a battery input and maintains accurate timekeeping when the main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device.
RTC modules, in essence, are TIME and DATE memorization systems which have a battery setup that in the absence of external power keeps the module running. This keeps the TIME and DATE up to date. So we can have accurate TIME and DATE from the RTC module whenever we want.
DS3231 Key Features
- Highly Accurate RTC Completely Manages All
- Register for Aging Trim
- RST Output/Pushbutton Reset Debounce Input
- Two Time-of-Day Alarms
- Programmable Square-Wave Output Signal
- Low power consumption
- Automatic power failure battery switch circuitry
- CR2032 battery backup with two to three-year life
- Potable size
- Simple Serial Interface Connects to Most Microcontrollers
- Battery-Backup Input for Continuous Timekeeping
- Low Power Operation Extends Battery-Backup Run Time
- Underwriters Laboratories® (UL) Recognized
DS3231 Pinout
| Pin Name | Description |
|---|---|
| VCC | Connected to a positive power source. |
| GND | Connected to ground. |
| SDA | Serial Data pin (I2C interface) |
| SCL | Serial Clock pin (I2C interface) |
| SQW | Square Wave output pin |
| 32K | 32K oscillator output |
Specifications DS3231
- Timekeeping Functions
- Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year, with Leap-Year Compensation Valid Up to 2100
- Accuracy ±2ppm from 0°C to +40°C
- Operating voltage of DS3231 MODULE: 2.3V – 5.5V
- Can operate on LOW voltages
- Consumes 500nA on battery backup
- The maximum voltage at SDA, SCL : VCC + 0.3V
- Operating temperature: -45ºC to +80ºC
- Accuracy ±3.5ppm from -40°C to +85°C
- Digital Temp Sensor Output: ±3°C Accuracy
Applications DS3231
- Keeps track of the current time and can be used in any device which needs to keep accurate time.
- Used for accurate measurement of date and time independent of any external supply due to the CR2302 3.3V cell.
- DS3231 Real-time clocks are also used to maintain accurate time measurements within an embedded system.
Datasheet DS3231
You can download the datasheet for the DS3231 Precision I2C Real-Time Clock Module by clicking the link given below:
See Also: CD4059 Program Divide-by-N Counter | MT8870D Integrated ISO2-CMOS DTMF Receiver Module | YX5300 MP3 Music Player UART Control Serial Module
