MAX805LCSA+ - English Editing Encyclopedia Entry

Product Overview

Category

MAX805LCSA+ belongs to the category of integrated circuits (ICs).

Use

The MAX805LCSA+ is primarily used as a voltage detector and reset circuit.

Characteristics

• Voltage detection range: 1.8V to 5V
• Low supply current: 3µA (typical)
• Precision voltage threshold: ±1.5%
• Open-drain active-low RESET output
• Small package size: SOIC-8
• RoHS compliant

Package and Quantity

The MAX805LCSA+ is available in an SOIC-8 package. It is typically sold in reels or tubes containing a specified quantity of units.

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 3µA (typical)
• Reset Threshold Accuracy: ±1.5%
• Reset Timeout Period: 140ms (typical)

Pin Configuration

The MAX805LCSA+ has the following pin configuration:

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| | --| VCC GND |-- Pin 1: Ground (GND) --| RST OUT |-- Pin 2: Reset Output (Active-Low) --| MR TH |-- Pin 3: Manual Reset Input --| |

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Functional Features

The MAX805LCSA+ offers the following functional features:

1. Voltage Detection: It accurately monitors the input voltage and provides a reset signal when it falls below a predetermined threshold.
2. Active-Low Reset Output: The open-drain RESET output becomes active-low when the voltage drops below the threshold, allowing it to interface with various microcontrollers and digital circuits.
3. Manual Reset Input: The MR pin allows for manual reset control, overriding the voltage detection.

Advantages and Disadvantages

Advantages

• Wide operating voltage range enables compatibility with a variety of systems.
• Low quiescent current minimizes power consumption.
• Precision voltage threshold ensures accurate detection.
• Small package size facilitates space-constrained designs.
• RoHS compliance promotes environmental friendliness.

Disadvantages

• Lack of adjustable voltage threshold limits customization options.
• Limited timeout period may not be suitable for all applications.

Working Principles

The MAX805LCSA+ operates by continuously monitoring the input voltage. When the voltage drops below the preset threshold, the reset output becomes active-low, indicating a power failure or low voltage condition. The reset signal remains active until the voltage rises above the threshold or a manual reset is triggered.

Detailed Application Field Plans

The MAX805LCSA+ finds applications in various fields, including:

1. Battery-Powered Devices: It can be used to detect low battery voltage and initiate appropriate actions, such as shutting down non-essential functions or triggering a warning.
2. Microcontroller Systems: The reset circuit ensures reliable system initialization by holding the microcontroller in a known state until the power supply stabilizes.
3. Industrial Control Systems: It provides a robust reset mechanism for critical control systems, preventing erratic behavior during power fluctuations.

Alternative Models

Below are some alternative models that offer similar functionality:

1. MAX809: This series offers adjustable voltage thresholds and additional features like watchdog timers.
2. MCP100: A cost-effective option with comparable specifications and package options.
3. TPS3808: Provides adjustable voltage thresholds and extended timeout periods for more flexibility.

In conclusion, the MAX805LCSA+ is a voltage detector and reset circuit IC that offers precise voltage detection, low power consumption, and a compact package. It finds applications in various fields, including battery-powered devices, microcontroller systems, and industrial control systems. While it lacks adjustable voltage thresholds, it provides reliable reset functionality. Alternative models like MAX809, MCP100, and TPS3808 offer different features to suit specific requirements.

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