DS1811-5/T&R

Product Overview

Category

DS1811-5/T&R belongs to the category of integrated circuits (ICs).

Use

This product is primarily used for voltage monitoring and reset functions in electronic devices.

Characteristics

• Voltage monitoring: DS1811-5/T&R monitors the supply voltage and provides a reset signal when it falls below a specified threshold.
• Reset function: It ensures that the microcontroller or other digital circuitry starts operating correctly after power-up or brownout conditions.
• Low power consumption: The DS1811-5/T&R operates with low power requirements, making it suitable for battery-powered applications.
• Small form factor: This IC comes in a compact package, allowing for space-efficient integration into various electronic designs.

Package and Quantity

The DS1811-5/T&R is available in a small SOT-23 package. It is typically sold in reels containing a quantity of 3000 units.

Specifications

• Supply voltage range: 1.6V to 5.5V
• Reset threshold voltage: 4.63V
• Reset timeout period: 140ms
• Operating temperature range: -40°C to +85°C

Pin Configuration

The DS1811-5/T&R has three pins:

1. VCC: Power supply input pin.
2. GND: Ground connection pin.
3. RESET: Output pin for the reset signal.

Functional Features

1. Voltage Monitoring: The DS1811-5/T&R continuously monitors the supply voltage and compares it to the preset threshold voltage.
2. Reset Signal Generation: When the supply voltage drops below the threshold, the DS1811-5/T&R generates a reset signal to ensure proper system initialization.
3. Adjustable Timeout Period: The reset signal remains active for a fixed timeout period, allowing sufficient time for the system to stabilize before normal operation resumes.
4. Manual Reset Input: The DS1811-5/T&R includes a manual reset input pin that can be used to force a system reset externally.

Advantages and Disadvantages

Advantages

• Reliable voltage monitoring and reset functionality.
• Low power consumption, suitable for battery-powered applications.
• Compact form factor for space-constrained designs.
• Adjustable timeout period for flexibility in different applications.

Disadvantages

• Limited reset threshold options.
• Lack of advanced features compared to more specialized voltage monitoring ICs.

Working Principles

The DS1811-5/T&R operates by continuously monitoring the supply voltage using an internal voltage comparator. When the voltage falls below the preset threshold, the comparator triggers the generation of a reset signal. This signal remains active for a fixed timeout period, allowing the system to stabilize before resuming normal operation.

Application Field Plans

The DS1811-5/T&R finds application in various electronic devices where reliable voltage monitoring and reset functions are essential. Some potential application fields include:

1. Microcontrollers: Ensuring proper initialization and reliable operation of microcontroller-based systems.
2. Embedded Systems: Providing voltage monitoring and reset capabilities in embedded systems for enhanced reliability.
3. Industrial Control Systems: Safeguarding critical industrial control systems against power fluctuations and ensuring proper system restart after power interruptions.
4. Consumer Electronics: Incorporating voltage monitoring and reset functionality in consumer electronic devices to prevent data corruption and ensure smooth operation.

Alternative Models

1. MAX811: A similar voltage monitoring and reset IC offered by Maxim Integrated.
2. MCP809: Another alternative from Microchip Technology, providing voltage monitoring and reset features.
3. TPS3808: Texas Instruments offers this IC with adjustable voltage monitoring and reset capabilities.

These alternative models offer similar functionalities to the DS1811-5/T&R and can be considered based on specific design requirements.

In conclusion, the DS1811-5/T&R is a versatile integrated circuit that provides reliable voltage monitoring and reset functions. Its low power consumption, compact form factor, and adjustable timeout period make it suitable for various electronic applications. However, designers should consider alternative models based on specific requirements and desired features.