MAX809REUR-T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, microprocessor reset circuit
• Package: SOT-23-3
• Essence: Ensures reliable system startup by monitoring the power supply voltage
• 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, 3.33V, 4.38V
• Reset Timeout Period: 140ms (min)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX809REUR-T has three pins:

1. GND: Ground connection.
2. RESET: Active-low reset output.
3. VCC: Power supply input.

Functional Features

• Monitors the VCC voltage and asserts the RESET pin low when the voltage drops below the specified threshold.
• Keeps the RESET pin low for a minimum timeout period after VCC rises above the threshold, ensuring proper system reset.
• Provides a debounced manual reset input (MR) for external reset control.

Advantages

• Low-power consumption, suitable for battery-powered applications.
• Small package size allows for space-efficient designs.
• Wide operating voltage range enables compatibility with various systems.
• Accurate reset threshold options provide flexibility for different voltage requirements.

Disadvantages

• Limited number of reset threshold options available.
• Lack of additional features like adjustable reset timeout or hysteresis.

Working Principles

The MAX809REUR-T is designed to monitor the power supply voltage of a system. When the voltage drops below the specified threshold, the IC asserts the RESET pin low, indicating a reset condition. This ensures that the system remains in a known state during power-up or voltage fluctuations. Once the VCC voltage rises above the threshold and remains stable for the reset timeout period, the RESET pin is released, allowing the system to resume normal operation.

Detailed Application Field Plans

The MAX809REUR-T is commonly used in various electronic systems where reliable power supply monitoring is critical. Some application fields include:

1. Microcontrollers and microprocessors: Ensures proper initialization and prevents erratic behavior during power-up.
2. Communication devices: Provides a controlled reset to maintain system stability after power interruptions.
3. Industrial control systems: Monitors power supply integrity to prevent data corruption or equipment malfunction.
4. Automotive electronics: Protects sensitive components from voltage fluctuations and ensures safe operation.

Detailed and Complete Alternative Models

1. MAX803/MAX809: Similar voltage supervisor ICs with different package options (SOT23-5, SOT23-6).
2. MAX811: Voltage supervisor IC with adjustable reset threshold and timeout options.
3. MAX6316: Voltage supervisor IC with additional features like manual reset input and watchdog timer functionality.

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

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