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

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

Product Details

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.

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
Parametric specs for All Real-Time Clocks
Interface I2C
VSUPPLY (V) 1.6 to 5.5
Date/ Time Format (hh = sec/100) YY-MM-DD/ HH:MM:SS
YY-MM-DD/ HH:MM:SS:hh
YYYY-MM-DD/ HH:MM:SS
Time Keeping Current (nA) (typ) 940
Memory Type NV SRAM
Memory Size (Bytes) 64
Time of Day Alarms 2
Integrated Resonator MEMs
Package/Pins COW/8
TDFN/8
Budgetary
Price (See Notes)
$1.72 @1k
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Simplified Block Diagram

MAX31343: Simplified Block Diagram MAX31343: Simplified Block Diagram Zoom icon

Technical Docs

Design & Development

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Description

The MAX31343 shield is a fully assembled and tested PCB to evaluate the MAX31343, low-cost, extremely accurate, real-time clock (RTC) with I2C interface and power management. The shield operates from a single supply, either from USB or external power supply, and the integrated microelectromechanical systems (MEMS) resonator enhances the long-term accuracy and eliminates the external crystal requirement in the system. This device is accessed through an I2C serial interface provided by a MAX32625 PICO board.

The MAX31343 shield provides the hardware and software user interface (GUI) necessary to evaluate the MAX31343. The shield includes a MAX31343EKA+T. It connects to the PC through a MAX32625 PICO board and a micro-USB cable.

View Details

Features

  • Easy Evaluation of the MAX31343
  • +1.6V to +5.5V Single-Supply Operation
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Arduino®/Mbed® Platform Compatible

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SIMULATION MODELS

MAX31343 IBIS Model

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Support & Training

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Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal.

Parameters

Parametric specs for All Real-Time Clocks
Interface I2C
VSUPPLY (V) 1.6 to 5.5
Date/ Time Format (hh = sec/100) YY-MM-DD/ HH:MM:SS
YY-MM-DD/ HH:MM:SS:hh
YYYY-MM-DD/ HH:MM:SS
Time Keeping Current (nA) (typ) 940
Memory Type NV SRAM
Memory Size (Bytes) 64
Time of Day Alarms 2
Integrated Resonator MEMs
Package/Pins COW/8
TDFN/8
Budgetary
Price (See Notes)
$1.72 @1k

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

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.

Simplified Block Diagram

MAX31343: Simplified Block Diagram MAX31343: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal.