MAX803LEXR/V+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor and Reset Circuit
• Characteristics:
  • Low-power consumption
  • Precision voltage monitoring
  • Wide operating voltage range
  • Small package size
• Package: SOT23-3
• Essence: The MAX803LEXR/V+T is a voltage monitor and reset circuit that provides accurate monitoring of the power supply voltage in electronic systems.
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.0V to 5.5V
• Threshold Voltage Options:
  • MAX803LEXR: 2.93V
  • MAX803LEXR+: 3.08V
  • MAX803LEXR/T: 4.63V
  • MAX803LEXR+/T: 4.88V
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 1µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX803LEXR/V+T has three pins:

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

Functional Features

• Accurate Voltage Monitoring: The MAX803LEXR/V+T monitors the power supply voltage and asserts the reset signal when the voltage drops below the threshold level.
• Reset Output: The active-low reset output signal remains asserted until the power supply voltage rises above the threshold level and the reset timeout period elapses.
• Low-Power Consumption: The IC operates with a quiescent current of only 1µA, making it suitable for battery-powered applications.
• Wide Operating Voltage Range: The MAX803LEXR/V+T can operate with a supply voltage ranging from 1.0V to 5.5V, providing flexibility in various electronic systems.

Advantages and Disadvantages

Advantages

• Precise voltage monitoring ensures reliable system operation.
• Low-power consumption extends battery life in portable devices.
• Small package size allows for space-saving PCB designs.
• Wide operating voltage range accommodates different power supply configurations.

Disadvantages

• Limited threshold voltage options may not suit all applications.
• Reset timeout period may not be adjustable, limiting customization.

Working Principles

The MAX803LEXR/V+T utilizes an internal voltage reference and comparator to monitor the power supply voltage. When the voltage drops below the threshold level, the reset output is asserted, indicating a low-voltage condition. The reset signal remains active until the voltage rises above the threshold level and the reset timeout period elapses. This ensures that the system is properly reset and ready for operation.

Detailed Application Field Plans

The MAX803LEXR/V+T is widely used in various electronic systems where accurate voltage monitoring and reset functionality are crucial. Some application fields include:

1. Microcontrollers: Ensuring proper initialization and reliable operation of microcontroller-based systems.
2. Embedded Systems: Providing voltage supervision for embedded systems to prevent erratic behavior during power fluctuations.
3. Industrial Control Systems: Monitoring power supply voltage in industrial control systems to maintain stable operation and prevent data loss.
4. Medical Devices: Ensuring safe and reliable operation of medical devices by monitoring power supply integrity.
5. Automotive Electronics: Voltage monitoring and reset circuitry for automotive electronics to prevent malfunctions and ensure safety.

Detailed and Complete Alternative Models

• MAX803REXR/V+T
• MAX803SEXR/V+T
• MAX803TEXR/V+T
• MAX803U/MAX803V/MAX803W

These alternative models offer similar voltage monitoring and reset circuit functionality, with variations in threshold voltage options, package types, or additional features.

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