MAX809SEXR+T

Product Overview

• Category: Integrated Circuits (ICs)
• Use: Voltage Supervisors
• Characteristics:
  • Low Power Consumption
  • Precision Voltage Monitoring
  • Reset Output with Adjustable Delay Time
  • Active-High and Active-Low Reset Outputs
  • Manual Reset Input
• Package: SOT-23-3
• Essence: MAX809SEXR+T 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, 3.63V, 4.38V
• Reset Timeout Period Options: 140ms, 560ms, 1120ms, 2240ms
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX809SEXR+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

• Voltage Monitoring: The MAX809SEXR+T continuously monitors the supply voltage and compares it to the preset threshold voltage.
• Reset Signal Generation: When the supply voltage drops below the threshold voltage, the MAX809SEXR+T generates a reset signal.
• Adjustable Delay Time: The delay time between the supply voltage falling below the threshold and the generation of the reset signal can be adjusted using an external capacitor.
• Reset Output Options: The MAX809SEXR+T provides both active-high and active-low reset outputs, allowing flexibility in system design.
• Manual Reset Input: A manual reset input pin is provided to override the voltage monitoring and generate a reset signal.

Advantages and Disadvantages

Advantages: - Low power consumption - Precision voltage monitoring - Adjustable delay time for reset signal generation - Multiple reset output options

Disadvantages: - Limited supply voltage range (1.0V to 5.5V) - Limited threshold voltage and timeout period options

Working Principles

The MAX809SEXR+T operates by continuously monitoring the supply voltage using an internal voltage reference. When the supply voltage drops below the preset threshold voltage, the IC generates a reset signal. The delay time between the voltage drop and the reset signal can be adjusted using an external capacitor. The reset signal can be either active-high or active-low, depending on the system requirements. Additionally, a manual reset input allows for an external trigger to generate a reset signal.

Detailed Application Field Plans

The MAX809SEXR+T is commonly used in various applications where voltage monitoring and reset functionality are required. Some of the typical application fields include:

1. Microcontrollers: Ensuring proper system initialization and recovery after power supply fluctuations.
2. Industrial Control Systems: Monitoring critical voltage levels to prevent system failures.
3. Automotive Electronics: Providing reliable reset signals for safety-critical systems.
4. Battery-Powered Devices: Protecting battery life by initiating a reset when the voltage drops below a certain level.
5. Communication Systems: Ensuring stable operation by resetting the system in case of power supply disturbances.

Detailed and Complete Alternative Models

1. MAX809SEUR+T: Similar to MAX809SEXR+T but with different reset threshold voltage options.
2. MAX809MEUR+T: Voltage supervisor IC with additional features like watchdog timer and adjustable reset timeout period.
3. MAX811SEUS+T: Voltage supervisor IC with push-pull reset output and adjustable reset threshold voltage.

These alternative models offer similar functionality to the MAX809SEXR+T but may have different specifications or additional features to suit specific application requirements.

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