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BQ3285ESSTR
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BQ3285ESSTR

Product Overview

Category

The BQ3285ESSTR belongs to the category of real-time clock (RTC) integrated circuits.

Use

This product is primarily used for timekeeping and calendar functions in electronic devices.

Characteristics

  • High accuracy timekeeping
  • Low power consumption
  • Small form factor
  • Integrated crystal oscillator
  • Non-volatile memory for data storage

Package

The BQ3285ESSTR is available in a small surface-mount package, making it suitable for compact electronic devices.

Essence

The essence of the BQ3285ESSTR lies in its ability to provide accurate timekeeping and calendar functionality with minimal power consumption.

Packaging/Quantity

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

Specifications

  • Supply voltage: 2.7V to 5.5V
  • Timekeeping accuracy: ±2 minutes per month
  • Operating temperature range: -40°C to +85°C
  • Data retention: Over 10 years
  • I2C interface compatibility

Detailed Pin Configuration

The BQ3285ESSTR has the following pin configuration:

  1. VCC - Power supply input
  2. GND - Ground connection
  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. VBAT - Backup battery input
  7. X1 - Crystal oscillator input
  8. X2 - Crystal oscillator output

Functional Features

  • Real-time clock with calendar functionality
  • Automatic leap year compensation
  • Alarm function with programmable settings
  • Battery backup for continuous operation during power loss
  • Oscillator stop detection and reset generation

Advantages and Disadvantages

Advantages

  • High accuracy timekeeping
  • Low power consumption
  • Compact form factor
  • Integrated crystal oscillator simplifies design
  • Non-volatile memory ensures data retention during power loss

Disadvantages

  • Limited quantity of units per package
  • Requires an external backup battery for continuous operation

Working Principles

The BQ3285ESSTR utilizes a crystal oscillator to generate clock signals, which are used for timekeeping and calendar functions. It communicates with the host device through the I2C interface, allowing for easy integration into various electronic systems. The integrated non-volatile memory ensures that time and date information is retained even during power loss.

Detailed Application Field Plans

The BQ3285ESSTR can be used in a wide range of applications, including but not limited to:

  1. Consumer electronics: Smartphones, tablets, digital cameras
  2. Automotive: Car infotainment systems, dashboard clocks
  3. Industrial equipment: Programmable logic controllers (PLCs), measurement devices
  4. Medical devices: Patient monitoring systems, medical instruments
  5. Home automation: Smart thermostats, security systems

Detailed and Complete Alternative Models

  1. DS3231 - Real-time clock module with temperature compensation
  2. PCF8563 - Low-power real-time clock with alarm function
  3. MCP7940N - I2C real-time clock/calendar with SRAM

These alternative models offer similar functionality to the BQ3285ESSTR and can be considered as alternatives based on specific requirements.

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10個與BQ3285ESSTR在技術方案中應用相關的常見問題與解答

Sure! Here are 10 common questions and answers related to the application of BQ3285ESSTR in technical solutions:

  1. Question: What is the BQ3285ESSTR?
    Answer: The BQ3285ESSTR is a real-time clock (RTC) and calendar device with an integrated temperature-compensated crystal oscillator (TCXO).

  2. Question: What is the purpose of using the BQ3285ESSTR in technical solutions?
    Answer: The BQ3285ESSTR is commonly used to provide accurate timekeeping and calendar functions in various applications, such as industrial automation, consumer electronics, and automotive systems.

  3. Question: How does the BQ3285ESSTR maintain accurate timekeeping?
    Answer: The BQ3285ESSTR utilizes a TCXO to compensate for temperature variations, ensuring precise timekeeping even in different environmental conditions.

  4. Question: Can the BQ3285ESSTR operate on its own without external components?
    Answer: No, the BQ3285ESSTR requires an external 32.768 kHz crystal oscillator and a backup power source, such as a supercapacitor or battery, to maintain timekeeping during power loss.

  5. Question: What communication interface does the BQ3285ESSTR support?
    Answer: The BQ3285ESSTR supports I2C (Inter-Integrated Circuit) communication protocol, allowing easy integration with microcontrollers and other devices.

  6. Question: Can the BQ3285ESSTR generate alarms or interrupts?
    Answer: Yes, the BQ3285ESSTR has programmable alarm and interrupt features, which can be configured to trigger specific actions based on time or date conditions.

  7. Question: Is the BQ3285ESSTR capable of handling daylight saving time changes?
    Answer: Yes, the BQ3285ESSTR provides automatic daylight saving time adjustment functionality, simplifying timekeeping in regions where DST is observed.

  8. Question: What is the operating voltage range of the BQ3285ESSTR?
    Answer: The BQ3285ESSTR operates within a voltage range of 2.7V to 5.5V, making it compatible with a wide range of power supply systems.

  9. Question: Can the BQ3285ESSTR be used in battery-powered applications?
    Answer: Yes, the low power consumption of the BQ3285ESSTR makes it suitable for battery-powered devices, ensuring extended battery life.

  10. Question: Are there any development tools or software libraries available for the BQ3285ESSTR?
    Answer: Yes, Texas Instruments provides software libraries and development tools, such as the RTC Driver Library, to facilitate the integration and programming of the BQ3285ESSTR in technical solutions.

Please note that these questions and answers are general and may vary depending on specific application requirements and implementation details.