MAX809LEUR+T

Product Overview

• Category: Integrated Circuits (ICs)
• Use: Voltage Supervisors
• Characteristics: Low Power, Reset Output, Active High, Open Drain or Open Collector, Push-Pull, SOT-23-3 Package
• Essence: MAX809LEUR+T is a voltage supervisor IC that monitors the power supply voltage of a system and generates a reset signal when the voltage drops below a predetermined threshold.
• Packaging/Quantity: SOT-23-3 package, available in tape and reel packaging with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.0V to 5.5V
• Threshold Voltage Options: 2.93V, 3.08V, 3.15V, 3.30V, 4.38V
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 3µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX809LEUR+T has three pins:

1. GND: Ground pin
2. RESET: Reset output pin
3. VCC: Power supply input pin

Functional Features

• Monitors the power supply voltage and asserts the reset output when the voltage falls below the threshold.
• Provides a reset signal to ensure proper system initialization after power-up or brownout conditions.
• Offers a choice between active high, open drain, or push-pull reset outputs.
• Low quiescent current consumption makes it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Multiple threshold voltage options provide flexibility for different voltage monitoring requirements. - Low quiescent current minimizes power consumption. - Small SOT-23-3 package enables space-saving designs.

Disadvantages: - Lack of adjustable threshold voltage limits customization options. - Limited reset timeout period may not be suitable for all applications.

Working Principles

The MAX809LEUR+T operates by comparing the power supply voltage with a fixed threshold voltage. When the supply voltage drops below the threshold, the reset output is asserted, indicating a power failure or brownout condition. The reset signal remains active until the supply voltage rises above the threshold and the reset timeout period elapses.

Detailed Application Field Plans

The MAX809LEUR+T finds applications in various fields, including:

1. Microcontrollers: Ensures proper initialization and reliable operation of microcontroller-based systems.
2. Embedded Systems: Provides voltage monitoring and reset functionality for embedded systems.
3. Industrial Control Systems: Guards against power supply fluctuations to maintain stable operation of industrial control systems.
4. Automotive Electronics: Protects automotive electronic components from voltage dips and ensures safe operation.
5. Portable Devices: Enables graceful shutdown or recovery in battery-powered portable devices during low voltage conditions.

Detailed and Complete Alternative Models

Some alternative models to the MAX809LEUR+T include:

1. MAX803/MAX809 Series: Similar voltage supervisor ICs with different package options and features.
2. ADM708/ADM809 Series: Voltage supervisors from Analog Devices offering comparable functionality.
3. TPS380x Series: Texas Instruments' voltage supervisors with additional features like manual reset input.

Note: This is not an exhaustive list, and there are several other alternatives available in the market.

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