R2043 系列


  • 概述

    The R2043 is a CMOS real-time clock IC connected to the CPU by four signal lines, CE, SCLK, SI, SO, and configured to perform serial transmission of time and calendar data to the CPU. The periodic interrupt circuit is configured to generate interrupt signals with six selectable interrupts ranging from 0.5 seconds to 1 month. The 2 alarm interrupt circuits generate interrupt signals at preset times. As the oscillation circuit is driven under constant voltage, fluctuation of the oscillator frequency due to supply voltage is small, and the time keeping current is small (TYP. 0.45 µA at 3V). The oscillation halt sensing circuit can be used to judge the validity of internal data in such events as power-on; The supply voltage monitoring circuit is configured to record a drop in supply voltage below two selectable supply voltage monitoring threshold settings. The 32.768 kHz clock output function (N-channel open drain output) is intended to output sub-clock pulses for the external microcomputer. The oscillation adjustment circuit is intended to adjust time counts with high precision by correcting deviations in the oscillation frequency of the crystal oscillator. Since the package for these ICs are TSSOP10G or QFN023023-16, high density mounting of ICs on boards is possible.

  • 规格
    计时电源电压范围 1.0 V to 5.5 V
    最小计时电源电压 Typ. 0.66 V
    电源电流 Typ. 0.45 µA (32 kHz Clock Output Disabled, VDD = 3 V)
    连接到CPU Four Signal Lines (CE ,SCLK, SI, SO)
    时钟输出 32.768 kHz (Nch Open Drain Output Controllable by command)
    封装 QFN023023-16, TSSOP10G


    ECO Clock Adjust OSC Halt Sensing Supply Voltage Monitoring Circuit Automatic Identification of Leap Years Selectable 12-hour and 24-hour Backup Switch
  • 技术资料
  • 品质&封装
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ECO ECO Function
Clock Adjust Clock Adjust Function
OSC Halt Sensing OSC Halt Sensing Function
Supply Voltage Monitoring Circuit Supply Voltage Monitoring Function
Automatic Identification of Leap Years Automatic Identification of Leap Years
Selectable 12-hour and 24-hour Selectable 12-hour and 24-hour
Built-in VD with Delay Time Built-in VD with Delay Time



接口 4-wire
min (V)
max (V)