MAX809LEUR+TG002

Product Overview

• Category: Integrated Circuit
• Use: Voltage Monitor and Reset Circuit
• Characteristics: Low-power, Precision, Supervisor with Manual Reset Input
• Package: SOT-23-3
• Essence: Monitors the power supply voltage of a microcontroller or other digital system and asserts a reset signal if the voltage drops below a preset threshold.
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Threshold Voltage Options: 2.93V, 3.08V, 3.15V, 3.30V, 4.38V, 4.63V, 4.75V, 4.88V
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 3µA (typical)
• Manual Reset Input: Active-Low
• Reset Timeout Period: 140ms (typical)

Detailed Pin Configuration

The MAX809LEUR+TG002 is a three-pin device with the following pin configuration:

1. GND: Ground connection
2. MR: Manual Reset input (active-low)
3. RESET: Reset output

Functional Features

• Monitors the supply voltage and asserts a reset signal when it falls below the programmed threshold.
• Provides a manual reset input for immediate system reset.
• Low quiescent current consumption, making it suitable for battery-powered applications.
• Precision voltage monitoring with selectable threshold options.
• Built-in glitch immunity ensures reliable operation in noisy environments.

Advantages

• Small package size allows for space-efficient designs.
• Wide supply voltage range enables compatibility with various systems.
• Low quiescent current prolongs battery life in portable devices.
• Accurate voltage monitoring helps prevent system malfunctions.
• Manual reset input provides flexibility in system control.

Disadvantages

• Limited threshold voltage options may not cover all application requirements.
• Lack of adjustable timeout period may not suit all system needs.
• SOT-23-3 package may be challenging for hand soldering.

Working Principles

The MAX809LEUR+TG002 operates by continuously monitoring the supply voltage using an internal voltage reference and comparator. When the voltage drops below the programmed threshold, the reset output is asserted, indicating a power failure or low voltage condition. The manual reset input allows the system to be reset immediately, overriding the voltage monitoring function.

Detailed Application Field Plans

The MAX809LEUR+TG002 is commonly used in various applications where reliable voltage monitoring and system reset functionality are required. Some typical application fields include:

1. Microcontroller-based systems
2. Industrial automation equipment
3. Battery-powered devices
4. Embedded systems
5. Communication devices

Detailed and Complete Alternative Models

• MAX809SEUR+TG002: Same functionality with different threshold voltage options (2.63V, 2.93V, 3.08V, 3.15V, 3.30V)
• MAX809MEUR+TG002: Same functionality with higher threshold voltage options (4.38V, 4.63V, 4.75V, 4.88V)

These alternative models provide flexibility in selecting the appropriate threshold voltage for specific application requirements.

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