NXP Semiconductors PCF2131 Nano-Power Highly Accurate RTC

NXP Semiconductors PCF2131 Nano-Power Highly Accurate RTC

NXP Semiconductors PCF2131 Nano-Power Highly Accurate Real-Time Clock (RTC) features an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768kHz quartz crystal. The PCF2131 is optimized for very high accuracy and ultra-low power consumption. The PCF2131 offers a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, four timestamps function, and many other features.

The NXP PCF2131 Nano-Power Highly Accurate RTC has an operating temperature range from -40°C to +85°C in an HLSON 16 package.

Features

  • Operating temperature range from -40°C to +85°C
  • Temperature Compensated Crystal Oscillator (TCXO) with trimmed integrated capacitors
  • Ultra-low supply current of typical 64nA at VDD = 3.3V
  • Temperature-compensated RTC, typical accuracy ±3ppm from -40°C to +85°C
  • Integration of a 32.768kHz quartz crystal and oscillator in the same package
  • Provides year, month, day, weekday, hours, minutes, seconds, and 1/100 seconds
  • Provides leap year correction
  • Timestamp function
    • With interrupt capability
    • Detection of four different events on four input pins (for example, for tamper detection)
  • 2-line bidirectional 400kHz Fast-mode I2C-bus interface
  • 4-line SPI-bus with separate data input and output (maximum speed 6.5Mbit/s)
  • Battery backup input pin and switch-over circuitry
  • Battery backed output voltage
  • Battery low detection function
  • Power-On Reset (POR)
  • Power-On Reset Override (PORO) function
  • Software reset function
  • Two interrupt outputs (open-drain)
  • Programmable 1 second or 1-minute interrupt
  • Programmable watchdog timer with interrupt
  • Programmable alarm function with interrupt capability
  • Programmable square output
  • Clock operating voltage of 1.2V to 5.5V

more information: https://www.nxp.com/products/peripherals-and-logic/signal-chain/real-time-clocks/rtcs-with-temperature-compensation/nano-power-highly-accurate-rtc-with-integrated-quartz-crystal:PCF2131

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Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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