The MCP79400-I/ST from Microchip Technology is a highly integrated Real-Time Clock/Calendar (RTCC) with a wealth of features designed for a broad range of applications. This compact device, available in a TSSOP package, offers accurate timekeeping with a leap year compensator and ample memory for data storage.

Key Features

• Real-Time Clock/Calendar: Tracks time with hours, minutes, and seconds, and maintains a calendar with date, month, and year.
• On-Chip EEPROM: 64 bytes of EEPROM provide storage for data that must be preserved during power loss, along with 128 bytes of SRAM.
• Battery-Backed Operation: An integrated battery backup input pin ensures continuous timekeeping during power outages.
• Unique ID: Comes with a factory-programmed, globally unique MAC address, eliminating the need for external network controller chips with MAC addresses.
• I2C Interface: Features an I2C interface for communication with microcontrollers and other digital devices, with clock speeds up to 400 kHz.
• Digital Trimming: Provides digital trimming capability to compensate for crystal frequency drift and maintain accurate timekeeping.
• Multiple Alarms: Includes multi-functional alarms that can be configured for various timing events, such as wake-up alarms or reminders.
• Power-Fail Time-Stamp: Records the time when power is lost, aiding in data recovery and diagnostics.

Applications

The MCP79400-I/ST is ideal for a wide range of applications, including:

• Smart energy and metering
• Consumer electronics
• Industrial and factory automation
• Automotive systems
• Networking and telecommunications

With its combination of precision timekeeping, memory storage, and unique identification capabilities, the MCP79400-I/ST is a versatile component that enhances the functionality of any time-sensitive electronic system.