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Name: MCP7940NT-E/SNVAO
Brand: Microchip Technology
SKU: MCP7940NT-E/SNVAO
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Microchip Technology MCP7940NT-E/SNVAO

Part No.:: MCP7940NT-E/SNVAO

Manufacturer:: Microchip Technology

Package:: 8-SOIC (0.154, 3.90mm Width)

Datasheet:: MCP7940NT-E/SNVAO.pdf

Description:: IC RTC CAL I2C/2-WIRE SER 8SOIC

In Stock:: 3601

Quantity:: Add To Cart

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MCP7940NT-E/SNVAO Specifications

Package/Case:
8-SOIC (0.154, 3.90mm Width)
Packaging:
Tape & Reel (TR)
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

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MCP7940NT-E/SNVAO information

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Basic introduction and simple engineering application of MCP7940NT-E/SNVAO

MCP7940NT-E/SNVAO is a highly integrated Real-Time Clock (RTC) module commonly used in electronic projects requiring precise timekeeping and calendar functions. It incorporates a battery-backed RTC with a temperature-compensated crystal oscillator (TCXO), providing accurate timekeeping even in harsh environmental conditions.

Introduction:

The MCP7940NT-E/SNVAO RTC module offers various features, including timekeeping, alarm functions, power-fail timestamp, and battery backup. It communicates with the host microcontroller via an I2C interface, making it easy to integrate into different projects.

Application Scenario:

In a home automation project, MCP7940NT-E/SNVAO can be utilized to schedule events, such as turning on/off lights or controlling temperature based on time. Let's explore how to integrate this module into a simple temperature-controlled LED display project.

Project Setup:

To create a temperature-controlled LED display using MCP7940NT-E/SNVAO, follow these steps:

1. Hardware Connections:

Connect the MCP7940NT-E/SNVAO RTC module to your microcontroller development board using the I2C interface. Ensure proper connections for SDA (data line) and SCL (clock line) pins.

2. Temperature Sensor Integration:

Integrate a temperature sensor, such as the DS18B20, with your microcontroller board. Connect it to the appropriate GPIO pins for data communication.

3. LED Display Setup:

Connect an LED display module to the microcontroller board. Utilize GPIO pins to control the display and show the current temperature or other relevant information.

4. Software Implementation:

Write firmware code to initialize the MCP7940NT-E/SNVAO module, read time from the RTC, and configure alarm settings if needed. Implement temperature reading from the sensor and update the LED display accordingly.

5. Testing and Calibration:

Test the complete setup by simulating different temperature conditions. Ensure the LED display accurately reflects the temperature readings obtained from the sensor and follows the scheduled events programmed through the RTC.

Considerations:

- Calibration: Calibrate the temperature sensor to compensate for any inaccuracies and ensure precise temperature readings.

- Power Management: Implement power-saving techniques to prolong the battery life of the MCP7940NT-E/SNVAO module and minimize overall power consumption.

- Error Handling: Include error-handling mechanisms in the firmware to handle communication errors or sensor failures gracefully.

- User Interface: Optionally, add a user interface, such as buttons or a touchscreen, to allow user interaction for setting alarms or adjusting display settings.

Conclusion:

In conclusion, MCP7940NT-E/SNVAO RTC module offers precise timekeeping and calendar functions, making it suitable for various projects requiring accurate scheduling and event management. By integrating it into a temperature-controlled LED display project, beginners can gain hands-on experience with RTC modules and sensor interfacing, enhancing their understanding of embedded systems design.

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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

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