BQ4847YMT

Product Overview

Category

BQ4847YMT belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for real-time clock (RTC) applications.

Characteristics

• Low power consumption
• High accuracy timekeeping
• Small form factor
• Wide operating voltage range

Package

BQ4847YMT is available in a small surface mount package.

Essence

The essence of BQ4847YMT lies in its ability to accurately keep track of time and provide real-time clock functionality.

Packaging/Quantity

This IC is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Timekeeping Accuracy: ±2 minutes per month
• Clock Frequency: 32.768 kHz
• Battery Backup Voltage: 1.8V to 5.5V

Detailed Pin Configuration

The BQ4847YMT IC has the following pin configuration:

1. VCC - Power supply input
2. GND - Ground connection
3. SDA - Serial data input/output
4. SCL - Serial clock input
5. XOUT - Crystal oscillator output
6. XIN - Crystal oscillator input
7. VBAT - Battery backup input
8. IRQ - Interrupt request output

Functional Features

• Real-time clock with calendar functionality
• Alarm and timer functions
• Battery backup for timekeeping during power loss
• I2C interface for communication with microcontrollers

Advantages and Disadvantages

Advantages

• High accuracy timekeeping
• Low power consumption
• Compact size
• Easy integration with microcontrollers

Disadvantages

• Limited timekeeping accuracy compared to more advanced RTCs
• Lack of additional features found in higher-end RTCs

Working Principles

BQ4847YMT utilizes a crystal oscillator to generate a precise clock frequency of 32.768 kHz. This clock signal is then divided and processed to keep track of time accurately. The IC also incorporates battery backup functionality, allowing it to maintain timekeeping during power interruptions.

Detailed Application Field Plans

BQ4847YMT finds applications in various fields, including:

1. Consumer electronics - Used in digital watches, clocks, and timers.
2. Industrial automation - Integrated into control systems for accurate time synchronization.
3. Automotive - Employed in car dashboard clocks and event logging systems.
4. Medical devices - Utilized in medical equipment that requires precise timekeeping.

Detailed and Complete Alternative Models

1. DS3231 - A highly accurate RTC with temperature compensation.
2. PCF8563 - An RTC with integrated alarm and timer functions.
3. MCP7940N - A low-power RTC with battery backup and I2C interface.

These alternative models offer similar functionalities to BQ4847YMT and can be considered as alternatives based on specific requirements.

In conclusion, BQ4847YMT is an integrated circuit designed for real-time clock applications. It offers high accuracy timekeeping, low power consumption, and compact size. While it may have some limitations compared to more advanced RTCs, it provides reliable timekeeping functionality for various applications across different industries.

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