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  • Manufacturer:
  • Newark Part No.: 94T7491
  • Manufacturer Part No MCP7940M-I/P

Product Overview

The MCP7940M-I/P is an I²C™ Real-time Clock/Calendar (RTCC) tracks time using internal counters for hours, minutes, seconds, days, months, years and day of week. Alarms can be configured on all counters up to and including months. For usage and configuration, the MCP7940M supports I²C communications up to 400kHz. The open-drain, multi-functional output can be configured to assert on an alarm match, to output a selectable frequency square wave or as a general purpose output. The MCP7940M is designed to operate using a 32.768kHz tuning fork crystal with external crystal load capacitors. On-chip digital trimming can be used to adjust for frequency variance caused by crystal tolerance and temperature.
  • On-chip digital trimming/calibration - ±1PPM resolution, ±129PPM range
  • Dual programmable alarms
  • Versatile output pin - Clock output with selectable frequency
  • 1.2μA at 3.3V Operating from VCC, low typical timekeeping current
  • 64-byte SRAM User memory
  • 2-wire serial interface, I²C™ compatible


Industrial; Clock & Timing; Industrial; Automotive
ESD sensitive device, take proper precaution while handling the device.
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Product Information

  • Date Format DD:MM:YYYY
  • Clock Format HH:MM:SS
  • Clock IC Type RTC
  • Supply Voltage Min 1.8V
  • Supply Voltage Max 5.5V
  • Clock IC Case Style DIP
  • No. of Pins 8Pins
  • IC Interface Type I2C
  • Operating Temperature Min -40°C
  • Operating Temperature Max 85°C
  • Packaging Each
  • MSL -
  • Memory Configuration 64 x 8bit
  • SVHC No SVHC (17-Dec-2015)
  • CAD CadSoft_EAGLE (2.65KB) EN
  • Availability

    Availability:  141

    • 141 in stock for same day shipping
    Check stock and lead times
      More stock available week commencing 7/25/16

    Price for: Each

    Minimum order quantity: 1

    Order multiple quantity: 1

    Price: $0.594 $0.594



    Quantity List Price
    1+ $0.594

    Legislation and Environmental

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