Computer Controls

Maxim Integrated presents MAX31342

The MAX31342 low-current, real-time clock (RTC) is a time-keeping device that provides an extremely low time-keeping current, permitting longer life from a power supply. The MAX31342 supports 6pF high-ESR crystals, which broaden the pool of usable crystals for the devices. This device is accessed through an I2C serial interface. An integrated power-on reset function ensures deterministic default register status upon power-up. Other features include two time-of-day alarms, interrupt outputs, a programmable square-wave output, and a serial bus timeout mechanism. The clock/calendar provides 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 24-hour mode. The MAX31342 also includes an input for synchronization. When a reference clock (e.g., 32kHz, 50Hz/60Hz Power Line, GPS 1PPS) is present at the CLKIN pin and the enable external clock input bit (ECLK) is set to 1, the MAX31342 RTC is frequency-locked to the external clock and the clock accuracy is determined by the external source. The device is available in lead(Pb)-free/RoHS-compliant, 8-pin wafer-level package (WLP) 1mm x 2mm package with 0.5mm pitch. The device supports the -40°C to +85°C extended temperature range.


Key features:

  • Increased battery life (150nA timekeeping current) allowing use of wide range of external crystals
    (with 6pF load and up 100kOhm ESR)
  • Programmable square wave output for clock monitoring
  • Integrated load capacitors for crystal oscillator
  • Ultra-small package – 8 pin 1x2mm WLP with 0.5mm pitch
  • +1.6V to 3.6V Operating voltage range
  • Countdown timer with repeat function
  • Power-on-Reset for default configuration
  • Lockup-free operation with bus timeout

MAX31342 RTC product could be used in a wide range of applications requiring long operation time on battery and small size:

  • Medical devices
  • POS (point-of-sale)
  • Portable audio
  • Portable instruments
  • Power meter
  • Telematics
  • Wearables

Download Datasheet [PDF]

As an evaluation platform for MAX31342 RTC product Maxim Integrated offers Evaluation Kit – MAX31342SHLD

Please use the form or call +41 44 308 66 66 for more information: