Maxim Integrated
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DS14285SN
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DS14285SN

Product Overview

  • Category: Integrated Circuit
  • Use: Real-time Clock (RTC)
  • Characteristics: High precision, low power consumption, small package size
  • Package: SOP-8
  • Essence: The DS14285SN is a real-time clock IC that provides accurate timekeeping and calendar functions.
  • Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

  • Supply Voltage: 2.97V to 5.5V
  • Operating Temperature Range: -40°C to +85°C
  • Timekeeping Accuracy: ±2 minutes per month at 25°C
  • Battery Backup Voltage: 2.0V to 5.5V
  • Battery Backup Current: 600nA (typical)

Detailed Pin Configuration

The DS14285SN has the following pin configuration:

  1. VCC - Power supply voltage input
  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. RST - Reset Input
  7. X1 - Crystal Oscillator Input
  8. X2 - Crystal Oscillator Output

Functional Features

  • Real-time clock with calendar functions
  • Automatic leap year compensation
  • Alarm and interrupt capabilities
  • Programmable square wave output
  • Battery backup support
  • Power-on reset circuitry
  • I2C interface for easy integration with microcontrollers

Advantages and Disadvantages

Advantages

  • High accuracy timekeeping
  • Low power consumption
  • Small package size
  • Easy integration with microcontrollers
  • Battery backup support ensures data retention during power loss

Disadvantages

  • Limited temperature range (-40°C to +85°C)
  • Requires an external crystal oscillator for clock accuracy

Working Principles

The DS14285SN utilizes a crystal oscillator to generate accurate timekeeping signals. It incorporates a real-time clock and calendar circuitry, which is powered by the main supply voltage or a backup battery. The I2C interface allows easy communication with microcontrollers, enabling precise timekeeping and calendar functions.

Detailed Application Field Plans

The DS14285SN is commonly used in various applications, including:

  1. Consumer Electronics: Used in digital cameras, portable media players, and smartwatches for accurate timekeeping.
  2. Industrial Automation: Integrated into industrial control systems for time synchronization and event scheduling.
  3. Automotive: Incorporated in automotive dashboards and infotainment systems for displaying accurate time and date information.
  4. Medical Devices: Utilized in medical equipment for timestamping events and data logging.
  5. Security Systems: Integrated into access control systems and surveillance devices for accurate time-stamping of events.

Detailed and Complete Alternative Models

  1. DS3231 - Real-time clock module with higher timekeeping accuracy and temperature compensation.
  2. PCF8563 - Low-power real-time clock IC with I2C interface and alarm functionality.
  3. MCP7940N - Real-time clock/calendar IC with battery backup support and I2C/SPI interface.

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Énumérez 10 questions et réponses courantes liées à l'application de DS14285SN dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of DS14285SN in technical solutions:

  1. Q: What is DS14285SN? A: DS14285SN is a real-time clock (RTC) chip manufactured by Maxim Integrated. It provides accurate timekeeping and calendar functions for various technical applications.

  2. Q: What are the key features of DS14285SN? A: Some key features of DS14285SN include battery backup, programmable alarms, power management, I2C interface, and temperature compensation.

  3. Q: How does DS14285SN maintain accurate timekeeping? A: DS14285SN uses an internal oscillator and a crystal to maintain accurate timekeeping. It compensates for temperature variations to ensure precise timekeeping.

  4. Q: Can DS14285SN be used in battery-powered devices? A: Yes, DS14285SN has a battery backup feature that allows it to continue timekeeping even when the main power source is disconnected.

  5. Q: How can DS14285SN be programmed? A: DS14285SN can be programmed using the I2C interface. The device supports various registers that can be accessed and configured through I2C commands.

  6. Q: What are the typical applications of DS14285SN? A: DS14285SN is commonly used in applications such as industrial automation, medical devices, data loggers, network equipment, and embedded systems that require accurate timekeeping.

  7. Q: Does DS14285SN have any built-in alarm functionality? A: Yes, DS14285SN supports multiple programmable alarms. These alarms can trigger interrupts or other actions based on specific date and time conditions.

  8. Q: Can DS14285SN synchronize with external time sources? A: DS14285SN does not have built-in synchronization capabilities. However, it can be externally synchronized by periodically updating its time registers from an external source.

  9. Q: What is the operating voltage range of DS14285SN? A: DS14285SN operates within a voltage range of 2.97V to 5.5V, making it compatible with a wide range of power supply systems.

  10. Q: Is DS14285SN RoHS compliant? A: Yes, DS14285SN is RoHS (Restriction of Hazardous Substances) compliant, ensuring that it meets environmental regulations regarding the use of hazardous materials.

Please note that these answers are general and may vary depending on specific technical requirements and implementations.