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NXP产品 - PCF2129介绍

PCF2129 - Accurate RTC with integrated quartz crystal for industrial applications

PCF2129是NXP恩智浦公司的一款带温度补偿的RTC产品，PCF2129是Accurate RTC with integrated quartz crystal for industrial applications，本站介绍了PCF2129的封装应用图解、特点和优点、功能等，并给出了与PCF2129相关的NXP元器件型号供参考。

PCF2129 - Accurate RTC with integrated quartz crystal for industrial applications - 带温度补偿的RTC - 实时时钟 - 恩智浦

产品描述

The PCF2129 is a CMOS Real Time Clock (RTC) and calendar with an integratedTemperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartzcrystal optimized for very high accuracy and very low power consumption. The PCF2129has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, aprogrammable watchdog function, a timestamp function, and many other features.

产品特性和优势
  • Operating temperature range from -40 °C to +85 °C
  • Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors
  • Typical accuracy:
    • PCF2129AT: ±3 ppm from -15 °C to +60 °C
    • PCF2129T: ±3 ppm from -30 °C to +80 °C
  • Integration of a 32.768 kHz quartz crystal and oscillator in the same package
  • Provides year, month, day, weekday, hours, minutes, seconds, and leap yearcorrection
  • Timestamp function:
    • with interrupt capability
    • detection of two different events on one multilevel input pin (for example, for tamperdetection)
  • Two line bidirectional 400 kHz Fast-mode I2C-bus interface
  • 3 line SPI-bus with separate data input and output (maximum speed 6.5 Mbit/s)
  • Battery backup input pin and switch-over circuitry
  • Battery backed output voltage
  • Battery low detection function
  • Power-On Reset Override (PORO)
  • Oscillator stop detection function
  • Interrupt output (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: 1.8 V to 4.2 V
  • Low supply current: typical 0.70 μA at VDD = 3.3 V
产品应用
  • Electronic metering for electricity, water, and gas
  • Precision timekeeping
  • Access to accurate time of the day
  • GPS equipment to reduce time to first fix
  • Applications that require an accurate process timing
  • Products with long automated unattended operation time
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