MCP79412T-I/ST

Product Overview

Category

The MCP79412T-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

• Low power consumption
• High accuracy
• Integrated battery backup
• I2C interface for easy communication with microcontrollers

Package

The MCP79412T-I/ST is available in a small surface-mount package, making it suitable for compact designs.

Essence

The essence of this product lies in its ability to accurately keep track of time and date, even during power interruptions.

Packaging/Quantity

The MCP79412T-I/ST is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Timekeeping Accuracy: ±1 minute per month
• Operating Temperature Range: -40°C to +85°C
• Battery Backup Voltage: 1.3V to 5.5V
• I2C Bus Frequency: Up to 400 kHz

Detailed Pin Configuration

The MCP79412T-I/ST has a total of 20 pins, which are as follows:

1. VBAT - Battery Backup Input
2. GND - Ground
3. VDD - Power Supply
4. SDA - I2C Serial Data Line
5. SCL - I2C Serial Clock Line
6. SQW/OUT - Square Wave Output
7. VSS - Ground
8. OSC1 - Oscillator Input
9. OSC2 - Oscillator Output
10. VBAT - Battery Backup Input
11. GND - Ground
12. VDD - Power Supply
13. SDA - I2C Serial Data Line
14. SCL - I2C Serial Clock Line
15. SQW/OUT - Square Wave Output
16. VSS - Ground
17. OSC1 - Oscillator Input
18. OSC2 - Oscillator Output
19. VBAT - Battery Backup Input
20. GND - Ground

Functional Features

• Real-time clock with calendar functions
• Alarm and timer functions
• Battery backup for uninterrupted timekeeping
• Programmable square wave output
• Power-fail timestamp

Advantages and Disadvantages

Advantages

• High accuracy timekeeping
• Low power consumption
• Integrated battery backup ensures uninterrupted operation
• Easy integration with microcontrollers through the I2C interface

Disadvantages

• Limited quantity of square wave output frequencies
• Relatively small package size may require additional space considerations in certain designs

Working Principles

The MCP79412T-I/ST utilizes an internal oscillator to keep track of time and date. It can be powered by a main power supply or a backup battery, ensuring continuous operation even during power interruptions. The device communicates with a microcontroller through the I2C interface, allowing for easy configuration and retrieval of time information.

Detailed Application Field Plans

The MCP79412T-I/ST finds applications in various electronic devices that require accurate timekeeping and calendar functions. Some potential application fields include:

1. Consumer Electronics: Smartphones, tablets, digital cameras
2. Industrial Automation: Programmable logic controllers (PLCs), data loggers
3. Automotive: Dashboard displays, infotainment systems
4. Medical Devices: Patient monitoring systems, medical equipment
5. Home Automation: Smart thermostats, security systems

Detailed and Complete Alternative Models

1. DS3231 - Real-Time Clock Module
2. PCF8563 - I2C Real-Time Clock
3. DS1307 - Serial Real-Time Clock

These alternative models offer similar functionality and can be considered as alternatives to the MCP79412T-I/ST.

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