MCP79402T-I/MNY

Introduction

The MCP79402T-I/MNY is a real-time clock/calendar (RTCC) device manufactured by Microchip Technology. This entry provides an overview of the product, including its category, use, characteristics, package, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.

Product Overview

• Category: Real-time Clock/Calendar (RTCC)
• Use: The MCP79402T-I/MNY is designed to provide accurate timekeeping and calendar functions for various applications, including consumer electronics, industrial equipment, automotive systems, and more.
• Characteristics: The device offers low-power operation, battery backup, alarm functions, and I2C interface for communication.
• Package: The MCP79402T-I/MNY is available in a small 8-pin SOIC package, making it suitable for space-constrained designs.
• Essence: The essence of this product lies in its ability to maintain accurate timekeeping and calendar functions with minimal power consumption.
• Packaging/Quantity: The device is typically supplied in tape and reel packaging, with quantities varying based on customer requirements.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Clock Accuracy: ±20 ppm from 0°C to +40°C
• I2C Interface: Supports standard (100 kHz) and fast (400 kHz) modes

Detailed Pin Configuration

The MCP79402T-I/MNY features the following pin configuration: 1. VBAT - Battery Input 2. SDA - I2C Serial Data 3. SCL - I2C Serial Clock 4. SQW/INT/SFT - Square Wave Output/Interrupt Output/Software Reset 5. GND - Ground 6. VSS - Ground 7. VDD - Power Supply 8. NC - No Connect

Functional Features

• Timekeeping: The device maintains seconds, minutes, hours, day, date, month, and year information.
• Alarm Functions: Allows for the setting of alarms for specific times or dates.
• Battery Backup: Integrated battery input ensures continuous operation during power loss.
• I2C Interface: Enables easy integration with microcontrollers and other devices.

Advantages and Disadvantages

Advantages

• Low power consumption
• Accurate timekeeping
• Small form factor
• Battery backup for reliable operation

Disadvantages

• Limited temperature range compared to some alternatives
• May require external crystal for enhanced accuracy

Working Principles

The MCP79402T-I/MNY utilizes an internal oscillator and a dedicated counter to keep track of time. It also incorporates registers for alarm settings and control registers for configuration. The device communicates with a host microcontroller through the I2C interface, allowing for seamless integration into various systems.

Detailed Application Field Plans

The MCP79402T-I/MNY is well-suited for applications requiring precise timekeeping and calendar functions, such as: - Digital clocks and timers - Data logging systems - Automotive dashboard displays - Industrial automation equipment - Smart home devices

Detailed and Complete Alternative Models

• DS3231: Offers higher temperature range and integrated temperature-compensated crystal oscillator (TCXO).
• PCF85263A: Provides additional tamper detection features and extended battery backup support.

In conclusion, the MCP79402T-I/MNY from Microchip Technology is a versatile RTCC device offering accurate timekeeping, low power consumption, and seamless integration capabilities. Its compact form factor and essential features make it an ideal choice for a wide range of applications.

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