MAX6420UK29+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics:
  • Monitors the voltage level of a system and generates a reset signal when the voltage falls below a specified threshold.
  • Provides power-on reset (POR) functionality to ensure proper initialization of the system.
  • Offers adjustable threshold voltage for flexibility in different applications.
• Package: SOT23-5
• Essence: Voltage monitoring and reset generation for electronic systems.
• Packaging/Quantity: Available in tape and reel packaging, with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Threshold Voltage Options: Adjustable from 1.2V to 4.63V in 100mV steps
• Reset Timeout Period: Fixed at 140ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 3µA (typical)

Pin Configuration

The MAX6420UK29+T has the following pin configuration:

____ RESET | | GND | | |____| VCC | | |____|

• RESET: Output pin that goes low when the monitored voltage falls below the threshold.
• GND: Ground reference pin.
• VCC: Power supply input pin.

Functional Features

• Monitors the voltage level continuously and compares it with the set threshold voltage.
• Generates a reset signal on the RESET pin when the voltage drops below the threshold.
• The reset signal remains active for the fixed timeout period after the voltage rises above the threshold again.
• Adjustable threshold voltage allows customization for different system requirements.
• Low quiescent current ensures minimal power consumption.

Advantages and Disadvantages

Advantages: - Provides reliable voltage monitoring and reset functionality for electronic systems. - Adjustable threshold voltage offers flexibility in different applications. - Low quiescent current minimizes power consumption. - Small package size (SOT23-5) allows for space-efficient integration into PCB designs.

Disadvantages: - Fixed reset timeout period may not be suitable for all applications. - Limited supply voltage range (1.6V to 5.5V) may restrict compatibility with certain systems.

Working Principles

The MAX6420UK29+T operates by continuously monitoring the voltage level at the VCC pin. It compares this voltage with the set threshold voltage, which can be adjusted using external resistors. When the voltage falls below the threshold, the RESET pin goes low, indicating a system reset condition. The reset signal remains active for a fixed timeout period of 140ms after the voltage rises above the threshold again.

Detailed Application Field Plans

The MAX6420UK29+T is commonly used in various electronic systems where voltage monitoring and reset functionality are required. Some potential application fields include:

1. Microcontroller-based Systems: Ensures proper initialization and reliable operation of microcontroller-based systems by providing power-on reset functionality.

2. Battery-Powered Devices: Monitors battery voltage to prevent damage due to undervoltage conditions and initiate system resets if necessary.

3. Industrial Control Systems: Protects sensitive industrial control equipment from voltage fluctuations and ensures safe operation.

4. Automotive Electronics: Provides voltage supervision for automotive electronic systems, ensuring reliable performance and preventing malfunctions.

Detailed and Complete Alternative Models

Some alternative models that offer similar voltage supervisor functionality are:

1. MAX6412UK26+T
2. MAX6389XS46D3-T
3. MAX6864UK22D3L+

These models have varying specifications and package options, allowing users to choose the most suitable option for their specific application requirements.

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