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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
ESD sensitive device, take proper precaution while handling the device.
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Product Specifications, Documents & More

  • Clock Format: HH:MM:SS
  • Clock IC Case Style: DIP
  • Clock IC Type: RTC
  • Date Format: DD:MM:YYYY
  • IC Interface Type: I2C
  • MSL: -
  • Memory Configuration: 64 x 8bit
  • No. of Pins: 8
  • Operating Temperature Max: 85°C
  • Operating Temperature Min: -40°C
  • Packaging: Each
  • SVHC: No SVHC (15-Jun-2015)
  • Supply Voltage Max: 5.5V
  • Supply Voltage Min: 1.8V


Availability:  152

  • 152 in stock for same day shipping
Check stock and lead times
    More stock available week commencing 4/11/16

Price for: Each 1

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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