DS1811R-15+T&R

Product Overview

Category

The DS1811R-15+T&R belongs to the category of electronic components.

Use

It is primarily used in electronic circuits for various applications.

Characteristics

• Package: The DS1811R-15+T&R comes in a small surface-mount package.
• Essence: It is a voltage supervisor and watchdog timer.
• Packaging/Quantity: It is typically packaged in reels and available in large quantities.

Specifications

The DS1811R-15+T&R has the following specifications:

• Supply Voltage Range: 2.7V to 5.5V
• Reset Threshold Voltage: 1.575V
• Watchdog Timeout Period: 1.6s
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The DS1811R-15+T&R has the following pin configuration:

1. GND (Ground)
2. RESET (Reset Output)
3. MR (Manual Reset Input)
4. VCC (Supply Voltage)

Functional Features

The DS1811R-15+T&R offers the following functional features:

• Voltage Supervision: Monitors the supply voltage and asserts reset when it falls below the threshold.
• Watchdog Timer: Provides a timeout period to detect system malfunctions and initiate a reset if necessary.
• Manual Reset: Allows for an external reset signal to be applied, overriding the internal monitoring circuitry.

Advantages and Disadvantages

Advantages: - Small package size enables space-saving designs. - Wide supply voltage range allows for compatibility with various systems. - Reliable voltage supervision and watchdog functionality enhance system reliability.

Disadvantages: - Limited timeout period may not be suitable for certain applications requiring longer monitoring intervals. - Lack of additional features compared to more advanced supervisory ICs.

Working Principles

The DS1811R-15+T&R operates by continuously monitoring the supply voltage. If the voltage falls below the reset threshold, the device asserts the reset output, initiating a system reset. Additionally, the watchdog timer ensures that the system is functioning properly by requiring periodic communication from the microcontroller. Failure to communicate within the specified timeout period results in a reset.

Detailed Application Field Plans

The DS1811R-15+T&R finds applications in various fields, including:

1. Embedded Systems: Provides reliable power-on reset functionality for microcontrollers and other digital components.
2. Industrial Control Systems: Ensures proper operation of critical control systems by monitoring the supply voltage and detecting faults.
3. Automotive Electronics: Enhances the safety and reliability of automotive electronics by resetting the system in case of voltage fluctuations or malfunctions.

Detailed and Complete Alternative Models

Some alternative models to the DS1811R-15+T&R include:

1. MAX811R: Similar voltage supervisor and watchdog timer with adjustable reset threshold.
2. LTC2937: Advanced supervisory IC with additional features such as power supply sequencing and margining.
3. TPS3839: Low-power voltage supervisor with adjustable reset threshold and long timeout period.

(Note: The above list is not exhaustive and serves as an example of alternative models.)

In conclusion, the DS1811R-15+T&R is a voltage supervisor and watchdog timer used in electronic circuits. It offers reliable voltage monitoring and reset functionality, making it suitable for various applications in embedded systems, industrial control systems, and automotive electronics. While it has certain limitations, there are alternative models available with additional features to suit specific requirements.