MAX6420UK31+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, precision voltage monitoring
• Package: SOT23-5
• Essence: Monitors the power supply voltage and provides a reset signal when the voltage falls below a certain threshold.
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage: 3.1V
• Reset Timeout Period: Adjustable from 1ms to 640ms
• Quiescent Current: 2µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX6420UK31+T has a total of 5 pins arranged as follows:

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Pin Number | Pin Name | Description --- | --- | --- 1 | GND | Ground 2 | MR | Manual Reset Input 3 | RESET | Reset Output 4 | VCC | Power Supply Voltage 5 | TH | Threshold Adjust

Functional Features

• Monitors the power supply voltage and generates a reset signal when the voltage drops below the preset threshold.
• Provides an adjustable timeout period for the reset signal.
• Low quiescent current consumption makes it suitable for battery-powered applications.
• Manual reset input allows for external control of the reset function.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows for use in various applications. - Adjustable reset timeout period offers flexibility. - Low quiescent current minimizes power consumption. - Small package size enables space-saving designs.

Disadvantages: - Limited number of pins may restrict functionality in complex systems. - Fixed reset threshold voltage may not be suitable for all applications.

Working Principles

The MAX6420UK31+T operates by continuously monitoring the power supply voltage. When the voltage falls below the preset threshold, the device generates a reset signal. The reset signal remains active until the voltage rises above the threshold or the timeout period elapses. The timeout period can be adjusted using an external resistor and capacitor connected to the TH pin.

Detailed Application Field Plans

The MAX6420UK31+T is commonly used in various applications where reliable voltage monitoring and reset functionality are required. Some typical application fields include:

1. Microcontrollers: Ensuring proper system initialization and preventing erratic behavior during power-up.
2. Industrial Control Systems: Providing fault detection and system reset capabilities in critical control circuits.
3. Automotive Electronics: Monitoring battery voltage and initiating system resets in case of voltage drops.
4. Portable Devices: Protecting sensitive components from voltage fluctuations and ensuring safe operation.

Detailed and Complete Alternative Models

1. MAX6421UK26+T: Similar voltage supervisor IC with a lower reset threshold voltage of 2.6V.
2. MAX6422UK29+T: Voltage supervisor IC with an adjustable reset threshold voltage ranging from 2.9V to 4.63V.
3. MAX6423UK31+T: Voltage supervisor IC with a higher reset threshold voltage of 3.1V and an adjustable timeout period.

These alternative models offer different features and specifications to cater to specific application requirements.

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