MCP79400T-I/MS

Product Overview

Category

The MCP79400T-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 MCP79400T-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 provide accurate timekeeping and calendar functionality with minimal power consumption.

Packaging/Quantity

The MCP79400T-I/MS is typically packaged in reels, containing 2500 units per reel.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month at 25°C
• 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 MCP79400T-I/MS has the following pin configuration:

| Pin Name | Function | |----------|----------| | VSS | Ground | | VBAT | Battery Backup Voltage Input | | SDA | I2C Serial Data Line | | SCL | I2C Serial Clock Line | | SQW/OUT | Square Wave Output or Interrupt Output | | RST | Reset Input | | VDD | Power Supply 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
• 64 bytes of non-volatile SRAM for data storage

Advantages and Disadvantages

Advantages

• Low power consumption extends battery life
• High accuracy ensures precise timekeeping
• Integrated battery backup eliminates the need for external components
• I2C interface simplifies communication with microcontrollers

Disadvantages

• Limited non-volatile SRAM capacity (64 bytes)
• Relatively higher cost compared to some other RTCs in the market

Working Principles

The MCP79400T-I/MS utilizes an internal oscillator to keep track of time. It synchronizes with an external crystal or resonator for accurate timekeeping. The device can be powered by a primary power source or a backup battery, ensuring uninterrupted operation even during power outages.

Detailed Application Field Plans

The MCP79400T-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), industrial timers
3. Automotive: Dashboard clocks, infotainment systems
4. Medical Devices: Patient monitoring systems, medical equipment with time-sensitive operations
5. Internet of Things (IoT): Smart home automation, wearable devices

Detailed and Complete Alternative Models

1. DS1307 - Real-Time Clock from Maxim Integrated
2. PCF8563 - Real-Time Clock from NXP Semiconductors
3. DS3231 - Extremely Accurate I2C RTC from Maxim Integrated

These alternative models offer similar functionalities and can be considered as alternatives to the MCP79400T-I/MS.

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