MAX31343

±5ppm, I2C Real-Time Clock with Integrated MEMS Oscillator

Industry's Lowest Power MEMS-Based Temperature-Compensated RTC Reduces Crystal Mechanical Failure Susceptibility


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Description

The MAX31343 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 eliminates the external crystal requirement in the system. The MAX31343 is available in the 8-pin WLP and TDFN packages.

The RTC maintains seconds, minutes, hours, day, date, month, year, and century information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year up to year 2199. The clock operates in the 24-hour format. Other features including two programmable time-of-day alarms, interrupt output, uncompensated programmable clock output, and temperature-compensated programmable square-wave output. Address and data are transferred serially through an I2C bidirectional bus. A voltage reference and comparator circuit monitors the status of VCC to detect power failures and automatically switch to the backup supply when necessary. See the Typical Application Circuit for more details.

MAX31343: Simplified Block Diagram MAX31343: Simplified Block Diagram Enlarge+

Key Features

  • Highly Accurate RTC with Integrated MEMS Resonator Completely Manages All Timekeeping Functions
    • Complete Clock Calendar Functionality Including Seconds, Minutes, Hours, Day, Date, Month, Year, and Century with Leap-Year Compensation Up to Year 2199
    • Timekeeping Accuracy ±5ppm (±0.432 second/day) from -40°C to 85°C
    • Two Time-of-Day Alarms
    • Temperature-Compensated Programmable Square-Wave Output
    • Uncompensated Programmable Clock Outputs
    • Automatically Switch over to Backup Battery or Supercapacitor on Power-Fail
    • Digital Temperature Sensor with ±3°C Accuracy
    • +1.6V to +5.5V Supply Voltage
  • 64-Byte RAM for User Data Storage
  • Simple Serial Interface Connects to Most Microcontrollers
    • I2C Interface
  • Battery-Backup Input for Continuous Timekeeping
  • Low-Power Operation Extends Battery-Backup Runtime
  • Operating Temperature Range: -40°C to 85°C
  • 2.1mm x 2.3mm, 8-Pin WLP Package
  • 4mm x 3mm, 8-Pin TDFN Package
  • Underwriters Laboratories® (UL) Recognized

Applications/Uses

  • Action Cameras
  • Communications
  • Handheld Instrumentation
  • Industrial
  • Power Meters
  • Wearables

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX31343SHLD: Evaluation Kit for the MAX31343

Technical Documents

User Guide 7256 MAX31343 Shield Software User Guidece

Tools & Models

  • MAX31343 IBIS Model
  • Request Reliability Report for: MAX31343 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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    MAX31343
    ±5ppm, I2C Real-Time Clock with Integrated MEMS Oscillator

    • Highly Accurate RTC with Integrated MEMS Resonator Completely Manages All Timekeeping Functions
    • 64-Byte RAM for User Data Storage
    • Simple Serial Interface Connects to Most Microcontrollers