MAX809SN490T1G

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor
• Characteristics: Low-power, Precision, Reset Output
• Package: SOT-23-3
• Essence: Monitors the voltage level and provides a reset signal when the voltage drops below a specified threshold.
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Options: 2.93V, 3.08V, 3.15V, 3.30V, 4.38V, 4.63V, 4.75V, 4.88V
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 1µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX809SN490T1G is a three-pin device with the following pin configuration:

1. GND: Ground connection
2. RESET: Reset output
3. VCC: Supply voltage input

Functional Features

• Monitors the supply voltage continuously
• Generates a reset signal when the voltage drops below the specified threshold
• Provides a stable reset output during power-up and power-down
• Low quiescent current consumption for power-sensitive applications

Advantages and Disadvantages

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

Disadvantages: - Limited reset timeout period may not be suitable for all applications requiring longer delays - Single-channel design may not be suitable for systems with multiple voltage monitoring requirements

Working Principles

The MAX809SN490T1G operates by comparing the supply voltage with a preset threshold. When the voltage drops below the specified threshold, the internal circuitry generates a reset signal. This signal remains active until the supply voltage rises above the threshold and stabilizes.

Detailed Application Field Plans

The MAX809SN490T1G is commonly used in various applications where voltage monitoring and reset functionality are required. Some typical application fields include:

1. Microcontrollers: Ensuring proper operation by resetting the system when the supply voltage falls below a critical level.
2. Battery-Powered Devices: Preventing damage to sensitive components by initiating a reset when the battery voltage drops too low.
3. Industrial Control Systems: Monitoring power supply integrity and providing a reset signal to maintain system reliability.
4. Automotive Electronics: Protecting electronic modules from voltage fluctuations and ensuring safe operation.

Detailed and Complete Alternative Models

1. MAX809SEUR+: Similar to MAX809SN490T1G but available in SOT-23-5 package with additional features such as manual reset input.
2. MAX809TEXR+: Offers adjustable reset threshold options and a wider temperature range compared to MAX809SN490T1G.
3. MAX809MEUR+: Provides a higher reset timeout period and lower quiescent current consumption than MAX809SN490T1G.

These alternative models offer similar voltage monitoring and reset functionalities, but with variations in package type, additional features, or improved specifications.

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