MAX800LEUE+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)

Use: The MAX800LEUE+ is a voltage detector and reset IC designed for use in various electronic devices. It provides accurate monitoring of power supply voltages and generates a reset signal when the voltage falls below a specified threshold.

Characteristics: - Voltage detection range: 1.6V to 5.5V - Low quiescent current: 3µA (typical) - Adjustable reset threshold voltage - Open-drain active-low reset output - Small package size: SOT-23-3 - RoHS compliant

Package and Quantity: The MAX800LEUE+ is available in a small SOT-23-3 package. It is typically sold in reels of 3000 units.

Specifications

The following are the specifications of the MAX800LEUE+:

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage Range: 1.2V to VDD-0.2V
• Quiescent Current: 3µA (typical), 10µA (maximum)
• Reset Timeout Period: 140ms (typical), 560ms (maximum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX800LEUE+ has a simple three-pin configuration:

• Pin 1: GND (Ground)
• Pin 2: VDD (Supply Voltage)
• Pin 3: RESET (Reset Output)

Functional Features

The MAX800LEUE+ offers the following functional features:

1. Voltage Monitoring: It continuously monitors the supply voltage and compares it with the user-adjustable threshold voltage.
2. Reset Generation: When the supply voltage drops below the threshold, the MAX800LEUE+ generates an active-low reset signal.
3. Reset Timeout: The IC includes a built-in reset timeout period to ensure that the reset signal is held for a specific duration after the voltage rises above the threshold.

Advantages and Disadvantages

Advantages: - Wide operating voltage range allows compatibility with various power supply systems. - Low quiescent current minimizes power consumption. - Adjustable reset threshold provides flexibility in different applications. - Small package size enables space-saving designs.

Disadvantages: - Lack of additional features such as hysteresis or adjustable timeout period limits its suitability for certain specialized applications. - Limited availability of alternative models from the same manufacturer.

Working Principles

The MAX800LEUE+ operates based on a voltage comparator circuit. It compares the supply voltage with the user-adjustable threshold voltage using an internal reference. When the supply voltage falls below the threshold, the comparator output triggers the reset circuitry, generating an active-low reset signal. The reset signal remains active for the specified timeout period after the voltage rises above the threshold.

Application Field Plans

The MAX800LEUE+ finds applications in various electronic devices where accurate voltage monitoring and reset functionality are required. Some potential application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper system initialization and preventing data corruption during power-up or brownout conditions.
2. Battery-Powered Devices: Protecting sensitive circuits from undervoltage conditions and providing controlled resets.
3. Industrial Control Systems: Monitoring power supply integrity and initiating system recovery in case of voltage fluctuations.
4. Automotive Electronics: Enabling reliable operation of automotive modules by detecting and responding to voltage variations.

Alternative Models

While the MAX800LEUE+ is a popular choice for voltage detection and reset applications, there are alternative models available from other manufacturers. Some notable alternatives include:

1. Texas Instruments TPS3808G01: Offers adjustable threshold voltage and additional features like hysteresis.
2. Analog Devices ADM803/ADM809: Provides a wide range of reset timeout options and various package options.
3. ON Semiconductor NCP302: Features low quiescent current and adjustable reset threshold voltage.

These alternative models offer similar functionality and can be considered based on specific application requirements.

In conclusion, the MAX800LEUE+ is a versatile voltage detector and reset IC that provides accurate monitoring and reset functionality in electronic devices. Its compact size, adjustable threshold, and low power consumption make it suitable for a wide range of applications.