The MM58274N is a low-power real-time clock (RTC) integrated circuit manufactured by National Semiconductor (now Texas Instruments). It provides accurate timekeeping and calendar functions, making it suitable for applications requiring precise time tracking, such as data loggers, industrial controllers, and embedded systems.

Applications:

• Data Loggers: Time-stamps data for accurate record-keeping.
• Industrial Controllers: Provides time-based control in industrial automation systems.
• Embedded Systems: Integrates timekeeping functionality into embedded devices.
• Electronic Calendars: Used in electronic calendars and personal organizers.
• Alarm Clocks: Provides timekeeping for alarm clock applications.
• Metering Devices: Time-stamps energy consumption in metering devices.

Features:

• Accurate Timekeeping: Provides accurate timekeeping with minimal drift.
• Calendar Functions: Includes calendar functions for date and day-of-week tracking.
• Low Power Consumption: Consumes minimal power for extended battery life.
• Serial Interface: Communicates with microcontrollers via a serial interface.
• Programmable Alarm: Offers a programmable alarm for time-based events.
• Battery Backup: Supports battery backup for continuous timekeeping during power outages.

Benefits:

• Precise Time Tracking: Accurate timekeeping ensures reliable time-stamping and scheduling.
• Extended Battery Life: Low power consumption extends battery life in portable devices.
• Easy Integration: Serial interface simplifies integration with microcontrollers.
• Flexible Alarm Functionality: Programmable alarm enables time-based event triggering.
• Continuous Timekeeping: Battery backup ensures continuous timekeeping during power outages.

Additional Details:

The MM58274N is available in a DIP (Dual In-line Package) and typically operates at a supply voltage of 3V. It communicates with a microcontroller via a simple serial interface, such as SPI or I2C. The RTC features a built-in oscillator and requires an external crystal for accurate timekeeping. It also supports various interrupt outputs for alarm and periodic time events. The data sheet provides detailed information on interfacing, configuration, and timing characteristics.