MCP79412T-I/MNY

Product Overview

• Category: Real-Time Clock (RTC)
• Use: Timekeeping and calendar functions
• Characteristics:
  • Low-power consumption
  • I2C interface
  • Battery backup
• Package: 8-pin SOIC
• Essence: Accurate timekeeping and calendar functionality
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage: 1.8V to 5.5V
• Timekeeping Accuracy: ±1 minute per month at 25°C
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Frequency: 100 kHz and 400 kHz
• Battery Backup Voltage: 1.3V to 5.5V

Detailed Pin Configuration

The MCP79412T-I/MNY has the following pin configuration:

1. VSS - Ground
2. VBAT - Battery backup supply voltage
3. SDA - I2C data line
4. SCL - I2C clock line
5. SQW/OUT - Square wave output or interrupt output
6. RST - Reset input
7. VDD - Power supply voltage
8. X1/X2 - Crystal oscillator connections

Functional Features

• Real-time clock with calendar functionality
• Battery backup for continuous operation during power loss
• Alarm and timer functions
• Programmable square wave output
• Power-fail timestamp
• 64 bytes of general-purpose SRAM
• I2C interface for communication with microcontrollers

Advantages and Disadvantages

Advantages: - Low-power consumption extends battery life - Accurate timekeeping and calendar functions - Flexible programming options - Small package size for space-constrained applications

Disadvantages: - Limited SRAM capacity - Requires an external crystal oscillator for accurate timekeeping

Working Principles

The MCP79412T-I/MNY is a real-time clock that uses an external crystal oscillator to maintain accurate timekeeping. It operates on a low supply voltage and consumes minimal power, making it suitable for battery-powered devices. The device communicates with a microcontroller through the I2C interface, allowing for easy integration into various systems.

Detailed Application Field Plans

The MCP79412T-I/MNY can be used in a wide range of applications, including:

1. Consumer electronics: Clocks, watches, and timers
2. Industrial automation: Programmable logic controllers (PLCs) and data loggers
3. Automotive: Dashboard clocks and event recorders
4. Medical devices: Patient monitoring systems and infusion pumps
5. Home automation: Smart thermostats and security systems

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 Real-Time Clock from Maxim Integrated
4. RV-8803-C7 - Real-Time Clock from Micro Crystal AG

These alternative models offer similar functionality and can be considered as alternatives to the MCP79412T-I/MNY.

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