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

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Microchip Technology MCP7940N-E/MS

Part No.:: MCP7940N-E/MS

Manufacturer:: Microchip Technology

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

Datasheet:: MCP7940N-E/MS.pdf

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

In Stock:: 2574

Quantity:: Add To Cart

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MCP7940N-E/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 ~ 125°C
MountingType:
Surface Mount

MCP7940N-E/MS this integrated circuit is available in factory sealed anti static packs. at icwhale.com. Please read product page below detail information. including MCP7940N-E/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-E/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-E/MS information

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

MCP7940N-E/MS is a highly versatile real-time clock (RTC) chip commonly used in various electronic projects and embedded systems. It offers precise timekeeping capabilities and multiple alarm functions, making it ideal for applications requiring accurate timekeeping and event scheduling.

Application Scenario:

In a weather monitoring system, MCP7940N-E/MS can be utilized to timestamp data readings and trigger alarms for specific weather conditions, such as temperature thresholds or rainfall levels.

Circuit Design:

To incorporate MCP7940N-E/MS into a weather monitoring project, follow these steps:

1. RTC Connection:

Connect MCP7940N-E/MS to the microcontroller's I2C interface. Ensure proper pull-up resistors are connected to the SDA and SCL lines for reliable communication.

2. Power Supply:

Provide a stable power supply to MCP7940N-E/MS within its specified voltage range. Utilize voltage regulators and capacitors to filter out noise and ensure consistent operation.

3. Sensor Integration:

Integrate sensors such as temperature sensors, humidity sensors, and rain sensors to gather environmental data. Use GPIO pins of the microcontroller to interface with these sensors.

4. Alarm Configuration:

Configure alarm settings in MCP7940N-E/MS to trigger interrupts based on predefined conditions, such as exceeding temperature thresholds or detecting significant changes in weather parameters.

5. Data Logging:

Implement data logging functionality to store timestamped sensor readings in non-volatile memory. Utilize MCP7940N-E/MS's EEPROM to store critical data even during power loss.

Experiment Procedure:

To understand the functionality of MCP7940N-E/MS, perform the following experiment:

1. Circuit Setup:

Connect MCP7940N-E/MS to an Arduino microcontroller using the I2C interface. Ensure proper wiring and connections are made according to the datasheet.

2. Timekeeping Test:

Program the Arduino to read the current time from MCP7940N-E/MS and display it on an LCD screen. Verify the accuracy of the RTC by comparing it with an external time source.

3. Alarm Triggering:

Set up an alarm in MCP7940N-E/MS to trigger an interrupt when a specific time is reached. Use LEDs or a buzzer to indicate when the alarm is activated.

4. Data Logging:

Log sensor readings along with timestamps provided by MCP7940N-E/MS into its EEPROM. Retrieve and display the logged data to verify the functionality of the data logging feature.

5. Power Interruption Test:

Simulate a power loss scenario and verify that MCP7940N-E/MS retains the correct time and alarm settings after power is restored.

Considerations:

When working with MCP7940N-E/MS, consider the following factors:

- I2C Communication: Ensure proper configuration of I2C communication parameters and address settings for MCP7940N-E/MS.

- Power Supply Stability: Maintain a stable power supply to prevent data corruption and ensure reliable operation of the RTC.

- Alarm Accuracy: Calibrate alarm settings to ensure accurate triggering based on predefined conditions.

- Data Integrity: Implement error-checking mechanisms to verify the integrity of stored data in MCP7940N-E/MS's EEPROM.

- Compatibility: Check the compatibility of MCP7940N-E/MS with the chosen microcontroller and sensor modules to avoid compatibility issues.

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