MCP79521T-I/MS

Product Overview

Category

The MCP79521T-I/MS belongs to the category of Real-Time Clocks (RTCs).

Use

This product is primarily used for timekeeping and synchronization purposes in various electronic devices.

Characteristics

• High accuracy timekeeping
• Low power consumption
• Integrated oscillator compensation
• Battery backup support
• I2C interface for communication

Package

The MCP79521T-I/MS is available in a small MSOP package, which ensures easy integration into compact electronic designs.

Essence

The essence of this product lies in its ability to provide accurate timekeeping functionality with minimal power consumption, making it suitable for battery-powered devices.

Packaging/Quantity

The MCP79521T-I/MS is typically packaged in reels or tubes, containing a specific quantity of units per package. The exact packaging and quantity can vary depending on the supplier.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Timekeeping Accuracy: ±1 minute per month (at 25°C)
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Frequency: Up to 400 kHz
• Battery Backup Voltage: 1.3V to 5.5V

Detailed Pin Configuration

The MCP79521T-I/MS has a total of 8 pins, each serving a specific function:

1. VSS: Ground connection.
2. VBAT: Battery backup voltage input.
3. SDA: Serial Data Line for I2C communication.
4. SCL: Serial Clock Line for I2C communication.
5. VDD: Power supply voltage input.
6. SQW/INT: Square Wave Output / Interrupt output pin.
7. OSC2: Oscillator output pin.
8. OSC1: Oscillator input pin.

Functional Features

• Real-time clock with calendar functionality
• Alarm and timer functions
• Battery backup support for uninterrupted timekeeping
• Integrated oscillator compensation for improved accuracy
• Configurable square wave output
• Interrupt output for event-driven applications

Advantages and Disadvantages

Advantages

• High accuracy timekeeping ensures precise synchronization.
• Low power consumption extends battery life in portable devices.
• Integrated oscillator compensation eliminates the need for external components.
• Flexible configuration options for various applications.

Disadvantages

• Limited temperature range may not be suitable for extreme environments.
• Relatively small package size may require careful PCB layout considerations.

Working Principles

The MCP79521T-I/MS utilizes an internal oscillator to generate accurate timekeeping signals. It communicates with the host microcontroller through the I2C interface, allowing for easy integration into existing systems. The device can operate from a power supply or switch to battery backup mode when the main power source is unavailable.

Detailed Application Field Plans

The MCP79521T-I/MS finds applications in various fields, including:

1. Consumer Electronics: Used in digital cameras, smartwatches, and home automation systems for accurate timekeeping and scheduling functions.
2. Industrial Automation: Integrated into industrial control systems for precise timing and synchronization of processes.
3. Automotive: Utilized in vehicle dashboard displays and infotainment systems to maintain accurate time and date information.
4. Medical Devices: Incorporated into medical equipment for time-sensitive operations and data logging.

Detailed and Complete Alternative Models

1. DS3231 - Real-Time Clock Module with I2C Interface
2. PCF8563 - Low Power Real-Time Clock with I2C-Bus Interface
3. DS1307 - Serial Real-Time Clock with I2C Interface
4. RV-8803-C7 - Ultra-Low Power Real-Time Clock Module

These alternative models offer similar functionality and can be considered as alternatives to the MCP79521T-I/MS.

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