MCP795W22-I/ST

Product Overview

Category

The MCP795W22-I/ST 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
• Small form factor
• I2C interface for easy integration
• Battery backup for uninterrupted operation

Package

The MCP795W22-I/ST comes in a small surface-mount package, making it suitable for compact designs.

Essence

The essence of this product lies in its ability to provide accurate timekeeping functionality with minimal power consumption.

Packaging/Quantity

The MCP795W22-I/ST is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month
• 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 MCP795W22-I/ST has the following pin configuration:

1. VDD - Power supply voltage
2. GND - Ground
3. SDA - I2C data line
4. SCL - I2C clock line
5. SQW/INT - Square wave output or interrupt output
6. VBAT - Battery backup voltage

Functional Features

• Real-time clock with calendar functionality
• Alarm and timer functions
• Battery backup for maintaining timekeeping during power loss
• Programmable square wave output
• Interrupt output for event-driven applications

Advantages

• High accuracy timekeeping ensures precise synchronization
• Low power consumption extends battery life
• Small form factor allows for integration in space-constrained designs
• I2C interface simplifies communication with other devices
• Battery backup ensures uninterrupted operation

Disadvantages

• Limited timekeeping accuracy compared to more advanced RTCs
• Lack of additional features found in higher-end models
• Relatively higher cost compared to basic RTC modules

Working Principles

The MCP795W22-I/ST utilizes an internal oscillator and a real-time clock counter to keep track of time. It communicates with the host microcontroller through the I2C interface, allowing for easy configuration and retrieval of time data. The battery backup ensures that the clock continues to operate even during power loss.

Detailed Application Field Plans

The MCP795W22-I/ST finds applications in various fields, including:

1. Consumer electronics: Used in digital cameras, portable media players, and smartwatches for accurate timekeeping.
2. Industrial automation: Integrated into control systems and data loggers to synchronize events and timestamps.
3. Automotive: Employed in car infotainment systems and dashboard displays for precise time synchronization.
4. Medical devices: Utilized in medical equipment for accurate timing of procedures and medication administration.

Detailed and Complete Alternative Models

1. DS3231 - A highly accurate RTC module with temperature compensation and integrated crystal oscillator.
2. PCF8563 - An ultra-low power RTC with alarm and timer functions, suitable for battery-powered devices.
3. DS1307 - A popular RTC module with simple I2C interface and low cost.

These alternative models offer similar functionality to the MCP795W22-I/ST and can be considered based on specific requirements and budget constraints.

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