BQ3287EMT - English Editing Encyclopedia Entry

Product Overview

Category

The BQ3287EMT belongs to the category of integrated circuits (ICs) specifically designed for real-time clock (RTC) applications.

Use

This IC is primarily used to provide accurate timekeeping and calendar functions in various electronic devices, such as computers, consumer electronics, industrial equipment, and automotive systems.

Characteristics

• High precision: The BQ3287EMT offers exceptional accuracy in timekeeping, ensuring reliable and precise time information.
• Low power consumption: This IC is designed to operate efficiently with minimal power consumption, making it suitable for battery-powered devices.
• Small form factor: The compact size of the BQ3287EMT allows for easy integration into space-constrained electronic designs.
• Wide operating voltage range: It can operate within a broad voltage range, providing flexibility in different applications.

Package

The BQ3287EMT is available in a small outline integrated circuit (SOIC) package, which provides ease of handling during assembly and ensures mechanical stability.

Essence

The essence of the BQ3287EMT lies in its ability to accurately keep track of time and date, enabling synchronized operations in various electronic systems.

Packaging/Quantity

The BQ3287EMT is typically packaged in reels or tubes, containing a specific quantity of ICs per package. The exact packaging and quantity may vary depending on the manufacturer's specifications.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month at 25°C
• Operating Temperature Range: -40°C to +85°C
• Clock Format: 24-hour or 12-hour format
• Alarm Function: Programmable alarms with interrupt capability
• Serial Interface: I2C bus-compatible interface for communication with microcontrollers

Detailed Pin Configuration

The BQ3287EMT IC has the following pin configuration:

1. VCC - Power supply voltage
2. GND - Ground reference
3. SDA - Serial data line for I2C communication
4. SCL - Serial clock line for I2C communication
5. SQW/OUT - Square wave output or interrupt output
6. X1 - Crystal oscillator input
7. X2 - Crystal oscillator output
8. VBAT - Backup battery input for maintaining timekeeping during power loss

Functional Features

• Real-time clock: The BQ3287EMT provides accurate timekeeping with support for leap years and automatic compensation for months with fewer than 31 days.
• Calendar functions: It includes a calendar with day, date, month, and year information, allowing for comprehensive date tracking.
• Alarm capabilities: The IC supports programmable alarms, enabling the triggering of specific events at predefined times.
• Battery backup: The BQ3287EMT features a backup battery input, ensuring uninterrupted timekeeping even during power outages.

Advantages and Disadvantages

Advantages

• High accuracy in timekeeping
• Low power consumption
• Compact form factor
• Wide operating voltage range
• Comprehensive calendar functions

Disadvantages

• Limited availability of alternative models
• Relatively higher cost compared to some other RTC ICs

Working Principles

The BQ3287EMT utilizes an internal quartz crystal oscillator to generate precise clock signals. It employs an integrated counter circuitry to keep track of time and date based on these clock signals. The IC also incorporates non-volatile memory to store time and date information, which is retained using a backup battery during power loss.

Detailed Application Field Plans

The BQ3287EMT finds applications in various fields, including: 1. Computers and laptops for accurate timekeeping and synchronization. 2. Consumer electronics, such as digital cameras and audio players, to maintain accurate timestamps. 3. Industrial equipment and automation systems for synchronized operations and event scheduling. 4. Automotive systems, including dashboard clocks and event-triggered functions.

Detailed and Complete Alternative Models

While the BQ3287EMT is a reliable RTC IC, alternative models with similar functionalities include: 1. DS3231 - A popular RTC IC known for its high accuracy and low power consumption. 2. PCF8563 - Another widely used RTC IC offering comprehensive calendar functions and low power operation. 3. MCP7940N - An RTC IC with additional features like battery-backed SRAM and tamper detection.

These alternative models provide options for designers based on specific requirements and availability.

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