MAX809REXR+T

Product Overview

• Category: Integrated Circuits (ICs)
• Use: Voltage Supervisors
• Characteristics: Low Power, Reset Timer, Active-Low Output, Push-Pull, Open Drain, SOT-23-3 Package
• Package: SOT-23-3
• Essence: Voltage Supervisor with Manual Reset Input
• Packaging/Quantity: Tape & Reel (3000 pieces per reel)

Specifications

• Supply Voltage Range: 1.0V to 5.5V
• Reset Threshold Voltage Options: 2.93V, 3.08V, 3.33V, 4.38V
• Manual Reset Input: Active-Low
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 3µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX809REXR+T has a SOT-23-3 package with the following pin configuration:

• Pin 1: GND (Ground)
• Pin 2: MR (Manual Reset Input)
• Pin 3: RESET (Reset Output)

Functional Features

• Monitors the power supply voltage and asserts a reset signal when the voltage drops below the specified threshold.
• Provides a manual reset input for immediate system reset.
• Offers a push-pull or open-drain reset output, depending on the application requirements.
• Low quiescent current consumption makes it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Multiple reset threshold voltage options provide flexibility in different applications. - Low power consumption extends battery life in portable devices. - Small SOT-23-3 package saves board space.

Disadvantages: - The reset timeout period may not be adjustable, limiting customization options. - Limited number of available alternative models.

Working Principles

The MAX809REXR+T is a voltage supervisor IC that continuously monitors the power supply voltage. When the voltage drops below the specified threshold, it asserts a reset signal to initiate a system reset. The manual reset input allows for an immediate reset, overriding the voltage monitoring function. The push-pull or open-drain reset output can be selected based on the application requirements. The low quiescent current consumption ensures minimal power drain from the power supply.

Detailed Application Field Plans

The MAX809REXR+T finds applications in various fields, including:

1. Microcontrollers and Processors: Ensures reliable system startup by monitoring the power supply voltage during power-on and brownout conditions.
2. Industrial Control Systems: Provides a reset signal to reset microcontrollers and other critical components in industrial automation systems.
3. Automotive Electronics: Monitors the vehicle's power supply voltage to ensure proper operation of electronic control units (ECUs) and safety systems.
4. Portable Devices: Protects battery-powered devices from undervoltage conditions, preventing data loss and ensuring safe shutdown.

Detailed and Complete Alternative Models

While the MAX809REXR+T is a popular choice, there are alternative models available from different manufacturers. Some notable alternatives include:

1. MAX811SEUS+T
2. ADM708TARZ
3. TPS3808G01DBVR
4. MCP101T-450I/TT

These alternative models offer similar functionality and features, providing options for different design requirements.

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