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Maxim Integrated

 

Maxim Integrated MAX31343 Real-Time Clock (RTC)

Industry's Lowest Power MEMS-Based Temperature-Compensated RTC

The Maxim Integrated MAX31343 is a low-cost, extremely accurate, I2C real-time clock (RTC) that reduces crystal mechanical failure susceptibility with ease. The real-time-clock device incorporates a battery input and maintains accurate ±5ppm timekeeping when main power to the device is interrupted. The integration of the microelectromechanical systems (MEMS) resonator enhances the long-term accuracy of the MAX31343 and eliminates the external crystal requirement in the system. The Maxim MAX31343 is available in the 8-pin WLP and TDFN packages.

The MAX31343 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 of the RTC include: Two programmable time-of-day alarms, interrupt output, uncompensated programmable clock output, and temperature-compensated programmable square-wave output. The MAX31343 real-time-clock serially transfers the address and data 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 all real-time-clocks by Maxim Integrated.
 

MAX31343 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
  • 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

MAX31343 Applications/Uses

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

 

MAX31343 Block Diagram

Maxim Integrated -MAX31343 Real-Time Clock Block Diagram