MAX6423US21+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-Power, Single/Dual Supply, Adjustable Reset Timeout, Active-Low/Active-High Reset Output
• Package: SOT-23-5
• Essence: The MAX6423US21+T is a voltage supervisor IC designed to monitor the power supply voltage of electronic systems and provide a reset signal when the voltage falls below a certain threshold.
• Packaging/Quantity: The MAX6423US21+T is available in a SOT-23-5 package and is typically sold in reels of 3000 units.

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage Options: 2.93V, 3.08V, 4.63V, or adjustable
• Reset Timeout Period Options: 140ms, 560ms, 1120ms, or adjustable
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 1.5µA (typical)

Pin Configuration

The MAX6423US21+T has the following pin configuration:

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

• RESET: Reset Output
• GND: Ground
• NC: No Connection
• VCC: Supply Voltage

Functional Features

• Monitors the power supply voltage and asserts the reset output when the voltage drops below the specified threshold.
• Provides an active-low reset output that remains asserted until the supply voltage rises above the threshold and the reset timeout period elapses.
• Can be configured for active-high reset output by connecting the RESET pin to an external pull-up resistor.
• Offers adjustable reset threshold voltage and timeout period options, allowing customization for specific applications.
• Low quiescent current consumption makes it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Adjustable reset threshold voltage and timeout period provide flexibility. - Low quiescent current consumption helps conserve power in battery-operated devices. - Small SOT-23-5 package enables space-saving integration into compact designs.

Disadvantages: - Limited number of reset threshold voltage options available. - No internal pull-up resistor for active-high reset configuration, requiring an external component.

Working Principles

The MAX6423US21+T operates by continuously monitoring the supply voltage using an internal voltage reference. When the voltage falls below the programmed threshold, the reset output is asserted. The reset output remains active until the supply voltage rises above the threshold and the reset timeout period elapses. The reset threshold voltage and timeout period can be adjusted using external resistors and capacitors.

Detailed Application Field Plans

The MAX6423US21+T is commonly used in various electronic systems where reliable power supply monitoring and reset functionality are required. Some application fields include:

1. Microcontroller Systems: Ensures proper system initialization and prevents erratic behavior during power-up or voltage fluctuations.
2. Industrial Control Systems: Provides a reliable reset signal to restart or reconfigure control systems after power disruptions.
3. Automotive Electronics: Monitors critical voltage levels to prevent damage to sensitive components and ensure safe operation.
4. Battery-Powered Devices: Protects against undervoltage conditions and extends battery life by initiating a controlled shutdown when the voltage drops too low.

Detailed and Complete Alternative Models

• MAX6424US21+T
• MAX6425US21+T
• MAX6426US21+T
• MAX6427US21+T

These alternative models offer similar voltage supervisor functionality with variations in features such as reset threshold voltage options, timeout periods, and package types. It is recommended to refer to the respective datasheets for detailed specifications and pin configurations of these alternatives.

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