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Microchip Technology MCP7940N-I/SN Environmental and export classification status description

- The MCP7940N-I/SN is a low-power, low-cost, serial interface real-time clock (RTC) module with battery backup. - It offers time and calendar functionality along with a set of versatile alarms. - The module provides binary-coded decimal (BCD) format for time and calendar information. - It operates between 1.8V to 5.5V, making it suitable for a wide range of applications. Functions: - Timekeeping: The MCP7940N-I/SN accurately keeps track of time and calendar information, including seconds, minutes, hours, days, months, and years. It also accounts for leap years. - Alarms: The module features two programmable alarms that can trigger an interrupt or perform a wake-up function. - Battery Backup: It includes backup power supply functionality, allowing it to maintain timekeeping during power loss or interruptions. - I2C Interface: The MCP7940N-I/SN utilizes I2C communication for easy integration into microcontroller-based systems. Applications: - Consumer Electronics: The module can be used in various consumer electronic devices such as digital clocks, home appliances, and audio systems. - Industrial Automation: It is suitable for industrial automation applications that require accurate timekeeping, scheduling, or event triggers. - Automotive: The MCP7940N-I/SN can be utilized in automotive applications where real-time clock functionality is necessary, such as in-vehicle infotainment systems or dashboard displays. Alternative Parts: - DS1307: Another popular real-time clock module with similar functionality. - PCF8523: A low-power real-time clock module that also provides additional features like temperature sensing. Embedded Modules: - The MCP7940N-I/SN can be integrated into various embedded systems using microcontrollers or development boards that support I2C communication. - For example, it can be used with Arduino boards by connecting it to the I2C pins and utilizing the appropriate libraries for controlling the module. - Similarly, it can be integrated into development boards from different manufacturers, including Raspberry Pi or STM32 boards, using the available I2C interfaces. Here are three related Q&A about the MCP7940N-I/SN: 1. Q: Can the MCP7940N-I/SN operate without an external battery? A: No, the module requires an external battery to provide backup power for timekeeping during power loss or interruptions. 2. Q: What is the maximum clock frequency supported by the MCP7940N-I/SN? A: The module supports a maximum I2C clock frequency of 400 kHz. 3. Q: Can the MCP7940N-I/SN be programmed and configured using software? A: Yes, the module can be easily programmed and configured through the I2C interface using software commands sent from a microcontroller or a host system. Please note that it is always recommended to refer to the product datasheet and documentation provided by the manufacturer for detailed and accurate information regarding the MCP7940N-I/SN.