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Home » NEWEST Products » New by Manufacturer » STMicroelectronics » STMicroelectronics M41T62LC6F Serial RTC with Alarm
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STMicroelectronics M41T62LC6F Real-Time Clock

The STMicroelectronics M41T62LC6F Serial Real-Time Clock is the industry's smallest RTC with embedded crystal saves space and battery life in portable electronics. The M41T62LC6F integrated RTC/crystal measures only 3.2x1.5mm and offers ultra-low power consumption. The STMicroelectronics M41T62LC6F RTC is ideally suited to the needs of battery-power designs. By operating at low voltages from 1.3 to 4.4V, this RTC can be driven directly from an Li-ion battery and draws only 350nA.

  • Serial real-time clock (RTC) with alarm functions
    • 400kHz I²C serial interface
    • Memory mapped registers for seconds, minutes, hours, day, date, month, year, and century
  • Tenths/hundredths of seconds register
  • 350nA timekeeping current at 3V
  • Timekeeping down to 1.0V
  • 1.3V to 4.4V I²C bus operating voltage
    • 4.4V max VCC suitable for lithium-ion battery operation
  • Low operating current of 35μA (at 400kHz)
  • 32KHz square wave output is on at power-up. Suitable for driving a microcontroller in low-power mode. Can be disabled.
  • Programmable 1Hz to 32KHz square wave output
  • Programmable alarm with interrupt function
  • 32KHz crystal oscillator integrates crystal load capacitors, works with high series resistance crystals
  • Accurate programmable watchdog
  • 62.5 ms to 31 min timeout
  • Software clock calibration. Can adjust timekeeping to within ±2 parts per million (±5 seconds per month)
  • Automatic leap year compensation
  • -40 to +85°C operation
  • Battery-Powered Electronics

Additional Resources

M41T62 Product Info
Block Diagram
Block Diagram
  • STMicroelectronics
  • Semiconductors|Integrated Circuits|IC-Clock & Timer