MCP7940M-I/P Low-Cost I2C RTCC with SRAM  

RTC Gerçek Zaman Saati


     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


  • Type    Clock/Calendar
  • Features    Alarm, Leap Year, Square Wave Output, SRAM
  • Memory Size    64B
  • Time Format    HH:MM:SS (12/24 hr)
  • Date Format    YY-MM-DD-dd
  • Interface    I²C, 2-Wire Serial
  • Voltage - Supply    1.8 V ~ 5.5 V
  • Voltage - Supply, Battery    -
  • Current - Timekeeping (Max)    1µA @ 5.5V
  • Operating Temperature    -40°C ~ 85°C
  • Mounting Type    Through Hole
  • Package / Case    8-DIP (0.300", 7.62mm)
  • Supplier Device Package    8-PDIP

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  • Brand: Microchip
  • Product Code: MCP7940M-I/P
  • Availability: In Stock
  • Fiyat : 39.00TL
  • KDV Dahil : 46.80TL

Tags: Microchip, MCP7940M-I/P, Low-Cost, I2C, IIC, RTCC with SRAM, Gerçek Zaman Saati