MAX6428ORUR+T

Product Overview

• Category: Integrated Circuits (ICs)
• Use: Voltage Supervisors
• Characteristics: Low Power, Precision, Adjustable Threshold
• Package: SOT-23-5
• Essence: Voltage Monitoring and Reset Generation
• Packaging/Quantity: Tape & Reel (3000 pieces per reel)

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Output Type: Active-Low Push-Pull
• Threshold Voltage Options: Adjustable or Fixed
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 3µA (typical)
• Power-On Reset Delay: 20ms (typical)

Detailed Pin Configuration

The MAX6428ORUR+T has a total of 5 pins:

1. GND: Ground pin
2. RESET: Active-low reset output
3. MR: Manual reset input
4. TH: Threshold voltage adjust pin
5. VCC: Positive supply voltage input

Functional Features

• Voltage monitoring with adjustable or fixed threshold options
• Active-low push-pull reset output
• Manual reset input for immediate system reset
• Low quiescent current for power efficiency
• Power-on reset delay for stable operation during power-up

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows flexibility in various applications - Adjustable threshold voltage provides customization for different voltage levels - Low quiescent current minimizes power consumption - Small package size (SOT-23-5) enables space-saving designs

Disadvantages: - Limited reset timeout period may not be suitable for all applications requiring longer delays - Fixed threshold voltage option may not be ideal for systems with varying voltage requirements

Working Principles

The MAX6428ORUR+T is a voltage supervisor IC that monitors the supply voltage and generates a reset signal when the voltage falls below a certain threshold. It operates by comparing the input voltage with an internally set reference voltage. The threshold voltage can be adjusted using the TH pin or set to a fixed value.

When the supply voltage drops below the threshold, the active-low reset output is asserted, indicating a power failure or voltage drop. The reset remains active until the supply voltage rises above the threshold and a timeout period elapses. The reset can also be manually triggered by applying a low-level signal to the MR pin.

The low quiescent current of the MAX6428ORUR+T ensures minimal power consumption during normal operation, making it suitable for battery-powered applications. The power-on reset delay feature provides a stable reset signal during power-up, preventing false resets caused by voltage fluctuations.

Detailed Application Field Plans

The MAX6428ORUR+T is commonly used in various electronic systems where reliable voltage monitoring and reset generation are critical. Some application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper system initialization and preventing data corruption during power-up or voltage fluctuations.
2. Industrial Control Systems: Monitoring power supply integrity in industrial automation equipment to prevent malfunctions or damage.
3. Automotive Electronics: Providing voltage supervision for automotive control units, ensuring safe and reliable operation.
4. Battery-Powered Devices: Extending battery life by efficiently managing power consumption and generating resets during low battery conditions.
5. Communication Systems: Maintaining system stability by monitoring power supply voltages in networking equipment, routers, and switches.

Detailed and Complete Alternative Models

• MAX6429MRURT+: Similar to MAX6428ORUR+T but with an active-high reset output.
• MAX6430UT+: Voltage supervisor with adjustable threshold and open-drain reset output.
• MAX6381XR26D3-T: Precision voltage monitor with fixed 2.6V threshold and active-low reset output.
• MAX6384XS23D1-T: Voltage supervisor with adjustable threshold and push-pull reset output.

(Note: This is not an exhaustive list of alternative models. Please refer to the manufacturer's datasheet for a complete list of alternatives.)

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