MAX709LESA+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, Precision, Adjustable Threshold
• Package: 8-pin Small Outline Integrated Circuit (SOIC)
• Essence: Monitors Power Supply Voltage
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Threshold Voltage Options: Adjustable or Fixed
• Reset Timeout Period: 140ms (typical)
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 3µA (typical)

Pin Configuration

The MAX709LESA+T has the following pin configuration:

```

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| | --| VCC | --| GND | --| RESET | --| MR | --| THRESHOLD | --| RESET OUT | --| GND | |___________| ```

Functional Features

• Monitors the power supply voltage and generates a reset signal when the voltage falls below a certain threshold.
• Provides an adjustable threshold option, allowing customization based on specific application requirements.
• Offers a reset timeout period to ensure proper system initialization.
• Low quiescent current consumption makes it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Adjustable threshold provides flexibility in voltage monitoring. - Low-power operation prolongs battery life in portable devices.

Disadvantages: - Fixed reset timeout period may not be suitable for all applications. - Limited number of pins restricts additional functionality integration.

Working Principles

The MAX709LESA+T is designed to monitor the power supply voltage in electronic systems. It compares the supply voltage with a user-defined threshold voltage. If the supply voltage drops below this threshold, the IC generates a reset signal to initiate system recovery or shutdown.

The threshold voltage can be set either by using an external resistor or through an internal reference voltage. This adjustable feature allows the IC to accommodate different voltage levels required by various applications.

The reset timeout period ensures that the system remains in a reset state for a specific duration after the power supply voltage returns to normal. This prevents premature system operation during power fluctuations or transients.

Detailed Application Field Plans

The MAX709LESA+T finds applications in various fields, including:

1. Microcontroller Systems: Provides reliable power-on reset functionality to ensure proper initialization of microcontrollers.
2. Industrial Automation: Monitors power supply voltage in control systems to prevent erratic behavior caused by voltage fluctuations.
3. Automotive Electronics: Ensures stable operation of automotive electronic modules by monitoring the vehicle's power supply voltage.
4. Portable Devices: Protects battery-powered devices from damage due to low voltage conditions and provides a controlled restart when the voltage is restored.

Alternative Models

• MAX708LESA+T: Similar voltage supervisor IC with fixed threshold voltage options.
• MAX703LESA+T: Low-power voltage supervisor IC with a smaller package size.
• MAX710LESA+T: Voltage supervisor IC with additional features like manual reset input and watchdog timer.

Note: The above alternative models are suggested based on similar functionality and specifications but may require further evaluation for compatibility with specific applications.

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