MAX809ZEXR+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
• Package: SOT-23-3
• Essence: MAX809ZEXR+T is a voltage supervisor IC that monitors the power supply voltage of a system and provides a reset signal to the microcontroller or other digital circuits when the voltage drops below a specified threshold.
• Packaging/Quantity: Tape & Reel (3000 pieces per reel)

Specifications

• Supply Voltage Range: 1.0V to 5.5V
• Threshold Voltage Options: 2.93V, 3.08V, 3.63V, 4.38V
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 3µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX809ZEXR+T has three pins in the SOT-23-3 package:

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

Functional Features

• Monitors the power supply voltage and generates a reset signal when it falls below the threshold voltage.
• Provides a stable reset output during power-up and power-down sequences.
• Offers a choice between active high push-pull or active low open-drain/reset output options.
• 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 consumption helps conserve power in battery-operated devices. - 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 requiring longer delays.

Working Principles

The MAX809ZEXR+T operates by comparing the supply voltage with a fixed threshold voltage. When the supply voltage drops below the threshold, the reset output is activated, indicating a power failure or an out-of-range condition. The reset output remains active until the supply voltage rises above the threshold and the reset timeout period elapses.

Detailed Application Field Plans

The MAX809ZEXR+T is commonly used in various electronic systems where reliable voltage monitoring and reset functionality are required. Some application fields include:

1. Microcontroller-based Systems: Provides a reset signal to microcontrollers during power-up and power-down sequences, ensuring proper initialization and preventing erratic behavior.
2. Industrial Control Systems: Monitors power supply voltages in industrial control equipment to ensure stable operation and prevent damage due to voltage fluctuations.
3. Automotive Electronics: Used in automotive applications to monitor critical voltages and trigger system resets in case of voltage anomalies.
4. Battery-Powered Devices: Enables low-power voltage monitoring in portable devices, extending battery life by minimizing power consumption.

Detailed and Complete Alternative Models

1. MAX809SEXR+T: Similar to MAX809ZEXR+T but with different threshold voltage options (2.63V, 2.93V, 3.08V, 3.63V).
2. MAX809TEXR+T: Offers a wider range of threshold voltage options (1.58V, 1.80V, 2.31V, 2.63V, 2.93V, 3.08V, 3.63V, 4.38V).
3. MAX809WEXR+T: Provides a higher reset timeout period of 560ms (typical) for applications requiring longer delays.

(Note: The above alternative models are just a few examples and not an exhaustive list.)

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