DS3231M
±5ppm, I2C Real-Time Clock
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Industry's First Temperature-Compensated RTC with Internal MEMS Resonator Reduces Crystal Mechanical Failure Susceptibility
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Features
- 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
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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
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Search
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Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
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DS3231M
Documentation
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Data Sheet
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DS3231M: ±5ppm, I2C Real-Time Clock Data Sheet (Rev.7)
DS3231M: ±5ppm, I²C实时时钟 Data Sheet (Rev.7)
Reliability Data
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123.06K
Technical Articles
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Data Sheet 1
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Design Note 6
Design Considerations for Analog Devices Real-Time Clocks
Feature Comparison of the DS323x Real-Time Clocks
Implementing Flawless Designs with Accurate I²C Real-Time Clocks
Selecting a Backup Source for Real-Time Clocks
Interfacing a DS3231 with an 8051-Type Microcontroller
Power Considerations for Accurate Real-Time Clocks
Technical Articles 7
Stuxnet and Other Things that Go Bump in the Night
The What, Why, When, Where and How of Real-Time Clocks (RTCs)
Industry Turns to MEMS for Accurate Real-Time Clocks
Driving Microelectromechanical Systems (MEMS) with Precision Control
State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks
Tips for Writing Bulletproof Real-Time Clock Control Code
MEMS Technology Provides Tangible Benefits for Real-Time Clocks
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.
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| DS3231M+ |
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| DS3231M+TRL |
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| DS3231MZ+ |
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| DS3231MZ+TRL |
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| DS3231MZ/V+ |
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SamacSys
- DS3231M+TRL
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Material Declaration
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- DS3231MZ+
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Small-Outline IC, Narrow (0.15in)
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- DS3231MZ+TRL
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Small-Outline IC, Narrow (0.15in)
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- DS3231MZ/V+
- Pin/Package Drawing
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Software & Part Ecosystem
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Accurate I²C RTC with Integrated TCXO/Crystal/FRAM |
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Accurate I²C RTC with Integrated TCXO/Crystal/FRAM |
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Serial Address RTCs3 |
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PRODUCTION |
Extremely Accurate I²C-Integrated RTC/TCXO/Crystal |
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PRODUCTION |
Extremely Accurate I²C RTC with Integrated Crystal and SRAM |
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PRODUCTION |
Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM |
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Evaluation Kits 3
DS3231MZEVKIT
Evaluation Kits for the DS3231M or DS3232M
Product Detail
Applications
- Building Automation
- High-Definition Video Security
- Industrial Application
- Power Meters
DS3232MEVKIT
Evaluation Kits for the DS3231M or DS3232M
Product Detail
Applications
- Building Automation
- High-Definition Video Security
- Industrial Application
- Power Meters
DS3231MPMB1
DS3231MPMB1 Peripheral Module
Features and Benefits
- High Accuracy Time-of-Day and Date (±5ppm) from -40°C to +85°C
- 32.768kHz Square-Wave Output
- Digital Temp Sensor with ±3°C Accuracy
- 6-Pin Pmod-Compatible Connector (I²C)
- Example Software Written in C for Portability
- Secondary Header Allows Daisy-Chaining of Additional Modules on the I²C Bus
- RoHS Compliant
- Proven PCB Layout
- Fully Assembled and Tested
Product Detail
The DS3231MPMB1 peripheral module provides the necessary hardware to interface the DS3231M real-time clock (RTC) to any system that utilizes Pmod™-compatible expansion ports configurable for I²C communication. The IC is a low-cost and extremely accurate I²C RTC. The device incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the micro-electromechanical systems (MEMS) resonator enhances the long-term accuracy of the device and reduces the piece-part count in a manufacturing line. The device is available in the same footprint as the popular DS3231 RTC.
Refer to the DS3231M IC data sheet for detailed information regarding operation of the IC.
Applications
- Industrial Applications
- Portable Instruments
- Power Meters
Tools & Simulations 2
Software Development 1
IBIS Model 1
IBIS Model
Reference Designs 1
MAXREFDES72
Pmod Adapter for Arduino Platform
Features and Benefits
Features
- Arduino® UNO R3 compatible
- IOREF support for 3.3V or 5V signal levels
- 2x6 Digilent® Pmod™ compatible interface
- Supports Pmod types 1, 2, 3, and 4, I2C and nonstandard pinouts
- Level shifting between Pmod and Arduino pins
- Precision RTC with integrated MEMS resonator
Applications
- Prototyping
- Science fair projects
- Maker and hobbyist projects
- Science and electronics education
- Analog peripheral testing and integration
