MAX809LEUR-T

Product Overview

• Category: Integrated Circuits (ICs)
• Use: Voltage Supervisors
• Characteristics: Low Power, Reset Timer, Active-Low Reset Output
• Package: SOT-23-3
• Essence: This product is a voltage supervisor IC that monitors the power supply voltage of a system and provides a reset signal when the voltage drops below a certain threshold.
• 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, 3.15V, 3.30V, 4.38V
• Reset Timeout Period Options: 140ms, 560ms, 1120ms, 2240ms
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX809LEUR-T has three pins:

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

Functional Features

• Monitors the power supply voltage and generates a reset signal when the voltage falls below the specified threshold.
• The reset signal remains active until the supply voltage rises above the threshold and the reset timeout period elapses.
• Low quiescent current consumption, making it suitable for battery-powered applications.
• Small package size allows for space-efficient designs.

Advantages and Disadvantages

Advantages: - Provides reliable power supply monitoring and reset functionality. - Wide supply voltage range allows for versatile use in various systems. - Multiple threshold voltage and timeout period options provide flexibility. - Low power consumption extends battery life in portable devices.

Disadvantages: - Limited number of threshold voltage and timeout period options may not meet the requirements of all applications. - SOT-23-3 package may be challenging to solder for some users.

Working Principles

The MAX809LEUR-T operates by comparing the supply voltage with a reference voltage internally generated. When the supply voltage drops below the threshold voltage, the reset output is activated, indicating a power failure. The reset signal remains active until the supply voltage rises above the threshold and the specified timeout period elapses.

Detailed Application Field Plans

The MAX809LEUR-T is commonly used in various electronic systems where reliable power supply monitoring and reset functionality are required. Some application fields include:

1. Microcontrollers: Ensuring proper system initialization and preventing erratic behavior during power-up or voltage fluctuations.
2. Industrial Control Systems: Providing fault detection and system reset capabilities in critical control applications.
3. Automotive Electronics: Monitoring vehicle battery voltage and initiating system resets in case of voltage drops.
4. Medical Devices: Ensuring safe operation by detecting power supply failures and triggering appropriate actions.
5. Consumer Electronics: Preventing data corruption and ensuring stable operation in devices such as smartphones, tablets, and gaming consoles.

Detailed and Complete Alternative Models

1. MAX803/MAX809 Series: Similar voltage supervisor ICs with different package options and additional features like manual reset input.
2. ADM1060: Programmable supervisory circuit with multiple voltage monitoring channels and configurable reset outputs.
3. TPS3808: Ultra-low-power voltage supervisor with adjustable threshold voltage and watchdog timer functionality.

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