MCP795B22T-I/ST

Product Overview

• Category: Integrated Circuit (IC)
• Use: Real-Time Clock (RTC) with EEPROM
• Characteristics:
  • Low power consumption
  • High accuracy timekeeping
  • Non-volatile memory for data storage
  • Small package size
• Package: TSSOP-8
• Essence: The MCP795B22T-I/ST is a real-time clock IC with built-in EEPROM, designed to provide accurate timekeeping and non-volatile memory storage in various electronic devices.
• Packaging/Quantity: The MCP795B22T-I/ST is typically sold in reels of 2500 units.

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
• Memory Size: 2Kb EEPROM
• I/O Pins: 8
• Communication Interface: I2C
• Clock Frequency: Up to 400kHz

Detailed Pin Configuration

The MCP795B22T-I/ST has the following pin configuration:

| Pin Number | Pin Name | Function | |------------|----------|----------| | 1 | VDD | Power Supply (1.8V to 5.5V) | | 2 | SDA | I2C Serial Data Line | | 3 | SCL | I2C Serial Clock Line | | 4 | VSS | Ground | | 5 | WP | Write Protect (EEPROM) | | 6 | VBAT | Battery Backup Input | | 7 | SQW/INT | Square Wave Output / Interrupt Output | | 8 | VOUT | Voltage Output (EEPROM) |

Functional Features

• Real-time clock with calendar and alarm functions
• Battery backup for timekeeping during power loss
• EEPROM memory for data storage
• I2C interface for communication with the host microcontroller
• Square wave output for timing applications
• Interrupt output for triggering events based on time or alarms

Advantages and Disadvantages

Advantages: - High accuracy timekeeping - Low power consumption - Small package size - Non-volatile memory for data storage

Disadvantages: - Limited memory size (2Kb) - Requires an external battery for backup

Working Principles

The MCP795B22T-I/ST utilizes a quartz crystal oscillator to generate accurate timekeeping signals. It uses a combination of hardware and software algorithms to maintain precise timekeeping, even during power loss. The built-in EEPROM allows for non-volatile storage of important data, such as configuration settings or event logs.

Detailed Application Field Plans

The MCP795B22T-I/ST is commonly used in various electronic devices that require accurate timekeeping and data storage capabilities. Some application fields include:

1. Consumer Electronics: Used in digital cameras, audio/video recorders, and home automation systems.
2. Industrial Automation: Integrated into programmable logic controllers (PLCs), industrial timers, and data loggers.
3. Automotive: Incorporated into car infotainment systems, dashboard clocks, and vehicle tracking devices.
4. Medical Devices: Utilized in patient monitoring systems, medical equipment timers, and drug dispensing machines.
5. Internet of Things (IoT): Integrated into smart home devices, wearable technology, and environmental sensors.

Detailed and Complete Alternative Models

1. DS3231 - Real-Time Clock IC with I2C interface and temperature compensation.
2. PCF8563 - Real-Time Clock IC with I2C interface and alarm functions.
3. DS1307 - Real-Time Clock IC with I2C interface and 56 bytes of non-volatile RAM.

These alternative models offer similar functionalities to the MCP795B22T-I/ST and can be considered as alternatives based on specific requirements and design constraints.

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