MCP79401T-I/MS

The MCP79401T-I/MS is a battery-backed real-time clock and calendar IC, which includes an integrated temperature-compensated crystal oscillator (TCXO). It offers a power-efficient, cost-effective solution for adding timekeeping and calendar functionality to systems. This device can be configured with alarm and timer functions, making it an ideal choice for applications that require low-power timing and scheduling.

Applications

The MCP79401T-I/MS is designed for many applications, including:

• Network appliances
• Computer clock synchronization
• Energy management systems
• Automotive immobilizers
• High-density servers
• Portable medical devices
• Industrial automation

Working Principle

The MCP79401T-I/MS uses a number of techniques to reduce power consumption while maintaining accurate time keeping. It features an internal oscillator with an accuracy of +/- 1 ppm over the operating temperature range, and uses an external crystal to provide an even more precise frequency reference. The device also utilizes power-saving configurations, such as running in sleep mode with reduced system clock frequency, or running a minimal mission-critical schedule.

The device has a pin (VCC_RTC) that is used to monitor the main power supply voltage. When it drops below 2.5V, the device enters sleep mode and all the associated circuitry is powered down, allowing for a low-power operation. An internal backup battery can be used to maintain data integrity, time, and operation for up to 10 years.

Conclusion

The MCP79401T-I/MS is a low-power, cost-effective real-time clock and calendar IC with an integrated temperature-compensated crystal oscillator (TCXO). It is an ideal solution for applications that require accurate timing and scheduling, and can be used in a variety of applications. The device features low-power configurations and a backup battery for data integrity, making it a reliable and efficient choice for many systems.