MCP795W20-I/SL

Product Overview

• Category: Integrated Circuit (IC)
• Use: Real-Time Clock (RTC) with EEPROM
• Characteristics: Low-power, I2C interface, 64-byte EEPROM, battery backup, programmable alarms
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Provides accurate timekeeping and non-volatile memory storage in various applications.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Clock Accuracy: ±2 minutes per month at 25°C
• Operating Temperature Range: -40°C to +85°C
• Memory Size: 64 bytes of EEPROM
• I2C Bus Speed: Up to 400 kHz
• Battery Backup: Integrated power-fail timestamp and battery switchover circuitry

Detailed Pin Configuration

The MCP795W20-I/SL has a total of 8 pins:

1. VSS: Ground
2. VDD: Power Supply
3. SDA: Serial Data Line (I2C)
4. SCL: Serial Clock Line (I2C)
5. WP: Write Protect (EEPROM)
6. VBAT: Battery Input for Backup Power
7. SQW/ALM: Square Wave Output / Alarm Output
8. INT/SQW: Interrupt Output / Square Wave Output

Functional Features

• Accurate Timekeeping: The MCP795W20-I/SL provides precise timekeeping with low power consumption.
• Non-Volatile Memory: It includes a 64-byte EEPROM for storing critical data even when power is lost.
• Programmable Alarms: Users can set up to two programmable alarms for specific time-based events.
• Battery Backup: The integrated power-fail timestamp and battery switchover circuitry ensure uninterrupted operation during power outages.

Advantages and Disadvantages

Advantages: - Low-power consumption - Accurate timekeeping - Non-volatile memory storage - Programmable alarms

Disadvantages: - Limited EEPROM capacity (64 bytes) - Requires an external battery for backup power

Working Principles

The MCP795W20-I/SL utilizes a quartz crystal oscillator to generate accurate clock signals. It communicates with the host microcontroller through the I2C interface, allowing easy integration into various systems. The built-in EEPROM provides non-volatile memory storage for critical data. In case of a power failure, the device seamlessly switches to battery backup, ensuring uninterrupted timekeeping and data retention.

Detailed Application Field Plans

The MCP795W20-I/SL is widely used in applications that require precise timekeeping and non-volatile memory storage. Some common application fields include:

1. Industrial Automation: Used in programmable logic controllers (PLCs) and industrial control systems for accurate time synchronization and event logging.
2. Consumer Electronics: Integrated into smart home devices, digital appliances, and wearable technology for time-sensitive functions and data storage.
3. Automotive: Employed in vehicle tracking systems, infotainment systems, and dashboard clocks for accurate time display and event scheduling.
4. Medical Devices: Utilized in medical equipment such as patient monitors, infusion pumps, and diagnostic devices for accurate time stamping and data logging.

Detailed and Complete Alternative Models

1. DS1307: Real-Time Clock IC with 56-byte EEPROM, I2C interface, and battery backup.
2. PCF8563: Low-power RTC IC with 240-byte EEPROM, I2C interface, and alarm functionality.
3. DS3231: Highly accurate RTC IC with temperature-compensated crystal oscillator, I2C interface, and battery backup.

(Note: These alternative models are provided for reference purposes and may have different specifications and features.)

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