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    首页产品索引MCP7940M

    MCP7940M

    购买收藏
    RTCC with SRAM (no battery backing)

     

    产品信息

    The MCP7940M I2CTM compatible real-time clock/calendar (RTCC) includes SRAM and a digital trimming circuit for accuracy which is normally found in higher priced devices. Using a low-cost 32,768 kHz crystal or other clock source, time is tracked in either a 12-hour or 24-hour format with an AM/PM indicator and timing to the second, minute, hour, day of the week, day, month and year. As an interrupt or wakeup signal, a multifunction open drain output can be programmed as an Alarm Out or as a Clock Out that supports 4 selectable frequencies.

    Timekeeping

      Real-Time Clock/Calendar (RTCC)

      Hours, Minutes, Seconds, Day of Week, Day, Month, Year

      Leap year compensated  to 2399

      12/24 hour modes

      On-Chip Digital Trimming/Calibration

      1 PPM Resolution

      ±129 PPM Range

      Dual Programmable Alarms

      Versatile Output Pin

      Clock output with selectable frequency

      Alarm output

      General Purpose output

      64 Bytes SRAM

      2-Wire Serial Interface, I2C™Compatible

      I2C Clock Frequency up to 400 kHz

    Low-Power

      Wide Voltage Range

      Operating Voltage 1.8V to 5.5V

      Low Typical Timekeeping Current

    电路图、引脚图和封装图

    在线购买

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    应用案例更多案例

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