MCP79402T-I/ST

Introduction

The MCP79402T-I/ST is a highly versatile and reliable real-time clock/calendar (RTCC) device designed for various electronic applications. This entry provides an in-depth 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.

Basic Information Overview

• Category: Real-Time Clock/Calendar (RTCC) IC
• Use: Timekeeping and calendar functions in electronic devices
• Characteristics: Low power consumption, battery backup, I2C interface
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Accurate timekeeping and date tracking
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Operating Voltage: 1.8V to 5.5V
• Clock Accuracy: ±20 ppm from 0°C to +40°C
• I2C Interface: Up to 400 kHz
• Battery Backup: Automatic switchover and write protection
• Memory: 64 bytes of SRAM

Detailed Pin Configuration

1. VBAT - Battery Input
2. SDA - I2C Data
3. SCL - I2C Clock
4. SQW/INT/SFT - Square Wave Output/Interrupt Output/Software Reset
5. GND - Ground
6. VSS - Ground
7. VDD - Power Supply
8. N/C - No Connection

Functional Features

• Timekeeping: Tracks seconds, minutes, hours, day, date, month, and year
• Alarms: Two programmable alarms with repeat intervals
• Power Management: Low-power modes for extended battery life
• Timestamp: Captures time and date of power failure

Advantages and Disadvantages

Advantages

• Low power consumption
• Wide operating voltage range
• Battery backup for continuous operation
• I2C interface for easy integration

Disadvantages

• Limited SRAM memory (64 bytes)
• Requires external crystal for clock accuracy

Working Principles

The MCP79402T-I/ST utilizes an integrated oscillator circuit to maintain accurate timekeeping and calendar functions. It operates using the I2C interface to communicate with the host microcontroller and can be powered by a backup battery to ensure uninterrupted operation.

Detailed Application Field Plans

The MCP79402T-I/ST is suitable for a wide range of applications, including: - Consumer electronics - Industrial automation - Automotive systems - Medical devices - IoT (Internet of Things) devices

Detailed and Complete Alternative Models

• DS3231: Offers higher precision and temperature-compensated crystal oscillator
• PCF85263A: Provides additional non-volatile memory and tamper detection features
• RX8130CE: Integrates a built-in crystal for simplified design

In conclusion, the MCP79402T-I/ST is a reliable RTCC device with low power consumption, versatile functionality, and broad application potential. Its robust features make it an ideal choice for various electronic systems requiring accurate timekeeping and calendar functions.

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