MCP79412-I/ST

Product Overview

Category

The MCP79412-I/ST belongs to the category of Real-Time Clocks (RTCs).

Use

This product is primarily used for timekeeping and calendar functions in various electronic devices.

Characteristics

• The MCP79412-I/ST is a low-power, real-time clock/calendar with an integrated 64-byte EEPROM.
• It operates on a wide voltage range of 1.8V to 5.5V, making it suitable for different applications.
• The device offers accurate timekeeping with a typical accuracy of ±2 minutes per month.
• It supports both 12-hour and 24-hour formats for time display.
• The MCP79412-I/ST includes battery backup functionality, ensuring uninterrupted operation during power loss.
• It features a programmable square wave output that can be used as an interrupt or clock source.

Package and Quantity

The MCP79412-I/ST is available in a small 8-pin SOIC (Small Outline Integrated Circuit) package. It is typically sold in reels containing a quantity of 250 units.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Interface: Supports standard and fast mode (up to 400 kHz)
• Battery Backup Voltage: 1.3V to 5.5V
• EEPROM Size: 64 bytes

Pin Configuration

The MCP79412-I/ST has the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VSS | Ground | | 2 | VBAT | Battery Input | | 3 | SDA | I2C Serial Data | | 4 | SCL | I2C Serial Clock | | 5 | SQW/INT | Square Wave Output / Interrupt Output | | 6 | VCC | Power Supply Voltage | | 7 | X1 | Crystal Connection | | 8 | X2 | Crystal Connection |

Functional Features

• Real-time clock with calendar functions
• Battery backup for uninterrupted operation
• Programmable square wave output
• Alarm and timer functions
• 64-byte EEPROM for data storage
• I2C interface for communication

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows for flexibility in different applications.
• Accurate timekeeping ensures reliable performance.
• Battery backup feature prevents data loss during power outages.
• Small package size enables space-saving designs.
• Integrated EEPROM provides additional data storage capability.

Disadvantages

• Limited EEPROM size may be insufficient for certain applications requiring extensive data storage.
• Lack of additional advanced features compared to some other RTCs in the market.

Working Principles

The MCP79412-I/ST utilizes an internal oscillator and a crystal to generate accurate timekeeping signals. It communicates with the host microcontroller through the I2C bus interface, allowing for easy integration into various systems. The battery backup feature ensures that the device continues to operate and retain its settings even when the main power supply is disconnected.

Detailed Application Field Plans

The MCP79412-I/ST finds applications in a wide range of electronic devices that require precise timekeeping and calendar functionality. Some potential application fields include:

1. Consumer Electronics: Used in digital cameras, portable media players, and smartwatches to maintain accurate time and date information.
2. Industrial Automation: Integrated into industrial control systems, programmable logic controllers (PLCs), and data loggers for time synchronization and event logging.
3. Automotive: Incorporated into automotive systems for tasks such as event timestamping, data logging, and alarm functions.
4. Medical Devices: Utilized in medical equipment like patient monitors, infusion pumps, and diagnostic devices to ensure accurate time tracking and synchronization.

Detailed Alternative Models

1. DS3231 - Real-Time Clock Module with Temperature Compensation
2. PCF8563 - I2C Real-Time Clock/Calendar with Alarm Function
3. DS1307 - Low-Power Serial Real-Time Clock

These alternative models offer similar functionalities to the MCP79412-I/ST and can be considered as alternatives based on specific requirements.

In conclusion, the MCP79412-I/ST is a versatile real-time clock/calendar device that provides accurate timekeeping and calendar functions. Its wide voltage range, battery backup feature, and integrated EEPROM make it suitable for various applications in consumer electronics, industrial automation, automotive, and medical devices. While it may have some limitations in terms of EEPROM size and advanced features compared to other RTCs, it remains a reliable choice for many time-sensitive applications.