Maxim Integrated
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DS1832
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DS1832

Product Overview

  • Category: Integrated Circuit
  • Use: Watchdog Timer
  • Characteristics: Low-power, programmable, reset generation
  • Package: 8-pin SOIC (Small Outline Integrated Circuit)
  • Essence: Monolithic CMOS IC
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 2.7V to 5.5V
  • Operating Temperature Range: -40°C to +85°C
  • Watchdog Timeout Periods: Programmable from 15ms to 1280ms
  • Reset Pulse Width: 200ms minimum
  • Power-On Reset Delay: 200ms minimum
  • Quiescent Current: 10µA typical
  • Active Current: 1mA maximum

Detailed Pin Configuration

The DS1832 has the following pin configuration:

  1. GND: Ground
  2. RESET: Active-low reset output
  3. VCC: Supply voltage
  4. MR: Master Reset input
  5. WDI: Watchdog Input
  6. TOUT: Watchdog Timeout Output
  7. NC: No Connection
  8. NC: No Connection

Functional Features

  • Watchdog Timer: Monitors system activity and generates a reset signal if necessary.
  • Programmable Timeout Period: Allows customization of the watchdog timeout period according to system requirements.
  • Power-On Reset: Generates a reset pulse upon power-up to ensure proper initialization.
  • Manual Reset: Provides a master reset input for manual system reset.
  • Watchdog Input: Allows external monitoring of system activity.
  • Watchdog Timeout Output: Indicates when the watchdog timer has expired.

Advantages and Disadvantages

Advantages: - Low-power consumption - Customizable timeout period - Small form factor - Easy integration into existing systems

Disadvantages: - Limited number of timeout period options - Lack of advanced features compared to more advanced watchdog timers

Working Principles

The DS1832 operates by continuously monitoring the system's activity through the watchdog input (WDI). If the system fails to provide a signal within the programmed timeout period, the DS1832 generates a reset pulse on the RESET pin. This ensures that the system is reset and brought back to a known state.

Detailed Application Field Plans

The DS1832 is commonly used in various applications where system reliability is crucial. Some of the typical application fields include:

  1. Embedded Systems: Provides a safety net for microcontroller-based systems, ensuring proper operation even in the presence of software or hardware failures.
  2. Industrial Automation: Ensures continuous operation of critical industrial processes by resetting malfunctioning systems.
  3. Medical Devices: Guarantees the reliable functioning of medical equipment, preventing potential hazards caused by system failures.
  4. Automotive Electronics: Enhances the safety and reliability of automotive electronics by monitoring and resetting malfunctioning systems.

Detailed and Complete Alternative Models

  1. MAX6816: Watchdog Timer with Programmable Timeout Periods and Manual Reset Input.
  2. LTC6905: Precision Programmable Oscillator with Watchdog Timer Functionality.
  3. TPS3820: Supervisory Circuit with Watchdog Timer and Manual Reset Input.

These alternative models offer similar functionality to the DS1832 and can be considered as alternatives based on specific requirements and design constraints.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací DS1832 v technických řešeních

Sure! Here are 10 common questions and answers related to the application of DS1832 in technical solutions:

  1. Q: What is DS1832? A: DS1832 is a watchdog timer IC (Integrated Circuit) used to monitor and reset microcontrollers or other digital systems.

  2. Q: How does DS1832 work? A: DS1832 monitors the system by periodically receiving a pulse from the microcontroller. If the pulse is not received within a specified time, it triggers a reset signal to restart the system.

  3. Q: What is the purpose of using DS1832 in technical solutions? A: The main purpose of using DS1832 is to ensure the reliability and stability of a system by preventing it from getting stuck or freezing due to software or hardware issues.

  4. Q: Can DS1832 be used with any microcontroller? A: Yes, DS1832 can be used with most microcontrollers as long as they have a pulse output that can be monitored by the watchdog timer.

  5. Q: How do I connect DS1832 to a microcontroller? A: DS1832 typically requires three connections - VCC (power supply), GND (ground), and a pulse input pin connected to the microcontroller's output pin.

  6. Q: What is the typical timeout period for DS1832? A: The timeout period can be set using external resistors and capacitors. It can range from a few milliseconds to several seconds, depending on the specific requirements of the system.

  7. Q: Can DS1832 be used in battery-powered applications? A: Yes, DS1832 can be used in battery-powered applications as it has low power consumption and can operate at low voltages.

  8. Q: Is DS1832 resistant to false triggering? A: Yes, DS1832 has built-in noise immunity and hysteresis to prevent false triggering due to electrical noise or transient voltage fluctuations.

  9. Q: Can DS1832 be used in safety-critical systems? A: Yes, DS1832 is commonly used in safety-critical systems where reliable operation is crucial, such as medical devices, industrial control systems, and automotive applications.

  10. Q: Are there any additional features of DS1832? A: Yes, DS1832 also provides a manual reset input pin, which allows for external triggering of the reset signal if required.

Please note that these answers are general and may vary depending on the specific implementation and requirements of the technical solution.