DS3231M
PRODUCTION±5ppm, I2C Real-Time Clock
Industry's First Temperature-Compensated RTC with Internal MEMS Resonator Reduces Crystal Mechanical Failure Susceptibility
- Part Models
- 6
- 1ku List Price
- Starting From $4.63
Part Details
- Highly Accurate RTC With Integrated MEMS Resonator Completely Manages All Timekeeping Functions
- Complete Clock Calendar Functionality Including Seconds, Minutes, Hours, Day, Date, Month, and Year, with Leap-Year Compensation Up to Year 2100
- Timekeeping Accuracy ±5ppm (±0.432 Second/Day) from -45°C to +85°C
- Footprint and Functionally Compatible to DS3231
- Two Time-of-Day Alarms
- 1Hz and 32.768kHz Outputs
- Reset Output and Pushbutton Input with Debounce
- Digital Temp Sensor with ±3°C Accuracy
- +2.3V to +5.5V Supply Voltage
- Simple Serial Interface Connects to Most Microcontrollers
- Fast (400kHz) I2C Interface
- Battery-Backup Input for Continuous Timekeeping
- Low Power Operation Extends Battery-Backup Run Time
- Operating Temperature Range: (-40°C to +85°C)
- 8-Pin or 16-Pin SO Packages
- Underwriters Laboratories® (UL) Recognized
The DS3231M is a low-cost, extremely accurate, I2C real-time clock (RTC). The device incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the microelectromechanical systems (MEMS) resonator enhances the long-term accuracy of the device and reduces the piece-part count in a manufacturing line. The DS3231M is available in the same footprint as the popular DS3231 RTC.
The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an active-low AM/PM indicator. Two programmable time-of-day alarms and a 1Hz output are provided. Address and data are transferred serially through an I2C bidirectional bus. A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the active-low RST pin is monitored as a pushbutton input for generating a microprocessor reset. See the Block Diagram in the full data sheet for more details.
Applications
- Industrial Applications
- Power Meters
Documentation
Data Sheet 1
Reliability Data 1
Design Note 6
Technical Articles 7
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| DS3231M+ | Small-Outline IC, Wide (0.3in) | ||
| DS3231M+TRL | Small-Outline IC, Wide (0.3in) | ||
| DS3231MZ+ | Small-Outline IC, Narrow (0.15in) | ||
| DS3231MZ+TRL | Small-Outline IC, Narrow (0.15in) | ||
| DS3231MZ/V+ | Small-Outline IC, Narrow (0.15in) | ||
| DS3231MZ/V+T | Small-Outline IC, Narrow (0.15in) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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| Parts | Product Life Cycle | Description |
|---|---|---|
| Real Time Clocks & Timers 5 | ||
| DS3231 | PRODUCTION | Extremely Accurate I²C-Integrated RTC/TCXO/Crystal |
| DS3232 | PRODUCTION | Extremely Accurate I²C RTC with Integrated Crystal and SRAM |
| DS3234 | PRODUCTION | Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM |
| DS32B35 | Accurate I²C RTC with Integrated TCXO/Crystal/FRAM | |
| DS32C35 | Accurate I²C RTC with Integrated TCXO/Crystal/FRAM |
Tools & Simulations
Software Development 1
IBIS Model 1
Reference Designs
Pmod Adapter for Arduino Platform
Part Used
Design & Integration Tools
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