DS1811R-5+T&R

Product Overview

Category: Integrated Circuits (ICs)

Use: The DS1811R-5+T&R is a voltage monitor and reset circuit designed for use in various electronic systems. It ensures proper system operation by monitoring the supply voltage and generating a reset signal when the voltage falls below a specified threshold.

Characteristics: - Voltage monitoring range: 0V to 5.5V - Reset threshold accuracy: ±5% - Low power consumption: <10µA - Small package size: SOT-23-5 - RoHS compliant

Package: The DS1811R-5+T&R is available in a tape and reel packaging, denoted by the "T&R" suffix. This packaging method provides convenience in automated assembly processes.

Essence: The essence of the DS1811R-5+T&R lies in its ability to monitor the supply voltage and ensure reliable system operation by generating a reset signal when necessary.

Packaging/Quantity: The DS1811R-5+T&R is typically packaged in reels containing 3000 units.

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage: 4.63V to 4.88V (adjustable)
• Reset Timeout Period: 140ms (typical)
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA (maximum)

Detailed Pin Configuration

The DS1811R-5+T&R features a standard SOT-23-5 package with the following pin configuration:

____ VCC |1 5| GND RST |2 4| N/C GND |3___|

Functional Features

1. Voltage Monitoring: The DS1811R-5+T&R continuously monitors the supply voltage and compares it to the preset threshold voltage.
2. Reset Generation: When the supply voltage falls below the threshold, the DS1811R-5+T&R generates a reset signal to initiate system reset or shutdown.
3. Adjustable Threshold: The reset threshold voltage can be adjusted within a specified range to suit different system requirements.
4. Reset Timeout: The DS1811R-5+T&R includes a built-in reset timeout period to prevent false resets during power-up or transient voltage fluctuations.
5. Low Power Consumption: With a quiescent current of less than 10µA, the DS1811R-5+T&R minimizes power consumption in battery-powered applications.

Advantages and Disadvantages

Advantages: - Accurate voltage monitoring ensures reliable system operation. - Adjustable threshold allows customization for different voltage levels. - Small package size enables space-saving integration into compact designs. - Low power consumption prolongs battery life in portable devices.

Disadvantages: - Lack of additional features such as hysteresis or adjustable timeout period limits its versatility in certain applications. - Limited operating temperature range may restrict usage in extreme environments.

Working Principles

The DS1811R-5+T&R operates by comparing the supply voltage with the preset threshold voltage. When the supply voltage drops below the threshold, the internal circuitry triggers the generation of a reset signal. This signal can be used to initiate a system reset or perform other necessary actions to ensure proper system operation.

Detailed Application Field Plans

The DS1811R-5+T&R finds application in various electronic systems where voltage monitoring and reliable operation are critical. Some potential application fields include:

1. Microcontrollers and Microprocessors: Ensuring stable operation and preventing data corruption during power supply fluctuations.
2. Industrial Control Systems: Monitoring power supply integrity to prevent equipment damage or malfunction.
3. Automotive Electronics: Providing reliable reset functionality in automotive control units to ensure safe operation.
4. Medical Devices: Ensuring proper functioning and patient safety by monitoring power supply stability.
5. Consumer Electronics: Preventing data loss and system crashes in devices such as routers, modems, and gaming consoles.

Detailed and Complete Alternative Models

1. DS1811R-10+T&R: Similar to DS1811R-5+T&R but with a higher reset threshold voltage of 4.88V to 5.13V.
2. DS1811R-3+T&R: Similar to DS1811R-5+T&R but with a lower reset threshold voltage of 4.38V to 4.63V.
3. DS1811R-ADJ+T&R: Adjustable threshold version allowing precise customization of the reset threshold voltage within a specified range.

These alternative models provide flexibility in choosing the appropriate voltage monitor and reset circuit based on specific system requirements.

In conclusion, the DS1811R-5