MCP79402T-I/MS

Product Overview

Category

The MCP79402T-I/MS 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 MCP79402T-I/MS comes in a small MSOP-8 package, which is suitable for space-constrained applications.

Essence

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

Packaging/Quantity

The MCP79402T-I/MS is typically packaged in reels and available in quantities of 2500 units per reel.

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: 100 kHz and 400 kHz

Detailed Pin Configuration

The MCP79402T-I/MS has the following pin configuration:

1. VSS - Ground
2. SDA - Serial Data Line
3. SCL - Serial Clock Line
4. SQW/OUT - Square Wave Output
5. VBAT - Battery Backup Input
6. VDD - Power Supply
7. X1 - Crystal Connection
8. X2 - Crystal Connection

Functional Features

• Real-time clock with calendar functionality
• Alarm and timer functions
• Battery backup for uninterrupted timekeeping
• Programmable square wave output
• 64 bytes of non-volatile SRAM for data storage

Advantages and Disadvantages

Advantages

• High accuracy timekeeping
• Low power consumption
• Compact package size
• Easy integration with microcontrollers

Disadvantages

• Limited non-volatile memory capacity
• Requires an external crystal for operation

Working Principles

The MCP79402T-I/MS utilizes an internal oscillator and an external crystal to accurately measure time. It communicates with a microcontroller through the I2C interface, allowing for easy configuration and retrieval of time and date information. The battery backup ensures uninterrupted timekeeping even during power loss.

Detailed Application Field Plans

The MCP79402T-I/MS finds applications in various electronic devices that require accurate timekeeping and calendar functionality. Some potential application fields include:

1. Consumer Electronics: Smartphones, tablets, digital cameras
2. Industrial Automation: Programmable logic controllers (PLCs), data loggers
3. Automotive: Dashboard clocks, car audio systems
4. Medical Devices: Patient monitoring systems, infusion pumps
5. Home Automation: Smart thermostats, security systems

Detailed and Complete Alternative Models

1. DS1307 - Real-Time Clock IC by Maxim Integrated
2. PCF8563 - Real-Time Clock Module by NXP Semiconductors
3. DS3231 - Extremely Accurate RTC by Maxim Integrated
4. RV-8803-C7 - Ultra-Low Power RTC by Micro Crystal AG

These alternative models offer similar functionalities and can be considered as alternatives to the MCP79402T-I/MS.

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