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Name: MCP7940N-I/MS
Brand: Microchip Technology
SKU: MCP7940N-I/MS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Microchip Technology MCP7940N-I/MS

Part No.:: MCP7940N-I/MS

Manufacturer:: Microchip Technology

Package:: 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)

Datasheet:: MCP7940N-I/MS.pdf

Description:: IC RTC CLK/CALENDAR I2C 8-MSOP

In Stock:: 2636

Quantity:: Add To Cart

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MCP7940N-I/MS Specifications

Package/Case:
8-TSSOP, 8-MSOP (0.118, 3.00mm Width)
Packaging:
Tube
Series:
Automotive, AEC-Q100
ProductStatus:
Active
Type:
Clock/Calendar
Features:
Alarm, Leap Year, Square Wave Output, SRAM
MemorySize:
64B
TimeFormat:
HH:MM:SS (12/24 hr)
DateFormat:
YY-MM-DD-dd
Interface:
I²C, 2-Wire Serial
Voltage-Supply:
1.8V ~ 5.5V
Voltage-SupplyBattery:
1.3V ~ 5.5V
Current-Timekeeping(Max):
1.2µA @ 3.3V
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

MCP7940N-I/MS this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including MCP7940N-I/MS price, data-sheet, in-stock availability, technical difficulties. Also. Quickly Enter the access of compare listing to find out replaceable electronic parts. If you want to retrieve comprehensive data for MCP7940N-I/MS to optimize the supply chain (including cross references, life-cycle, parametric, counterfeit risk, obsolescence managements forecasts), please contact to our Tech-supports team.

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MCP7940N-I/MS information

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Basic introduction and simple engineering application of MCP7940N-I/MS

MCP7940N-I/MS is a highly integrated Real-Time Clock (RTC) device with I2C interface, manufactured by Microchip Technology. It is designed to provide accurate timekeeping and calendar functions for various applications, including consumer electronics, industrial automation, and automotive systems.

Application Scenario:

In a home automation project, MCP7940N-I/MS can be utilized to schedule and trigger specific events based on the current time, such as turning on/off lights, controlling heating systems, or activating security alarms.

Circuit Design:

To incorporate MCP7940N-I/MS into a simple project, follow these steps:

1. Connection Setup:

Connect MCP7940N-I/MS to a microcontroller, such as an Arduino, using the I2C communication protocol. Connect the SDA pin of MCP7940N-I/MS to the microcontroller's SDA pin and the SCL pin to the microcontroller's SCL pin. Ensure proper pull-up resistors (typically 4.7kΩ) are connected between the SDA and SCL lines and the power supply voltage.

2. Power Supply:

Provide power to MCP7940N-I/MS by connecting the VCC pin to a regulated 5V power supply. Ensure proper decoupling capacitors are placed near the VCC and GND pins to stabilize the power supply.

3. Crystal Oscillator:

Connect an external 32.768 kHz crystal oscillator to the X1 and X2 pins of MCP7940N-I/MS to ensure accurate timekeeping. Ensure proper load capacitors (typically 12.5 pF) are connected between each crystal pin and the ground.

4. Initialization:

Initialize the MCP7940N-I/MS device by writing the appropriate configuration values to its control registers. Configure the clock settings, including time, date, alarm, and calibration values, as per the project requirements.

5. Function Integration:

Integrate the RTC functionalities into the project's firmware code. Utilize the I2C communication library to communicate with MCP7940N-I/MS and read/write time and date values. Implement event scheduling and triggering logic based on the RTC's timekeeping capabilities.

Considerations:

When working with MCP7940N-I/MS, consider the following aspects:

- Backup Power Supply: Implement a backup power supply, such as a coin cell battery, to maintain the RTC's timekeeping functionality during main power interruptions.

- Temperature Compensation: Account for temperature variations by calibrating the RTC periodically or implementing temperature compensation algorithms to ensure accurate timekeeping over a wide temperature range.

- Error Handling: Implement error handling mechanisms in the firmware code to handle communication errors or RTC malfunction scenarios gracefully.

- Integration with Other Sensors: Integrate additional sensors, such as temperature or light sensors, with MCP7940N-I/MS to enhance the project's functionality and enable more sophisticated automation scenarios.

- Testing and Validation: Thoroughly test the project to validate the accuracy and reliability of the RTC's timekeeping performance under various operating conditions.

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