MAX6425UK21+T

Product Overview

• Category: Integrated Circuit
• 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: 2.1V
• Reset Timeout Period: 140ms
• Quiescent Current: 3µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX6425UK21+T has a SOT23-5 package with the following pin configuration:

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Pin 1: GND (Ground) Pin 2: RESET (Reset Output) Pin 3: MR (Manual Reset Input) Pin 4: VCC (Supply Voltage) Pin 5: TH (Threshold Voltage)

Functional Features

• Monitors the power supply voltage and generates a reset signal when the voltage drops below the threshold.
• Provides a manual reset input for external reset control.
• Low quiescent current makes it suitable for battery-powered applications.
• Precision voltage monitoring ensures accurate reset timing.

Advantages and Disadvantages

Advantages: - Low-power operation extends battery life. - Small package size allows for space-saving designs. - Accurate voltage monitoring ensures reliable system reset.

Disadvantages: - Limited supply voltage range may not be suitable for all applications. - Fixed reset threshold voltage may not be adjustable for specific requirements.

Working Principles

The MAX6425UK21+T is a voltage supervisor IC that continuously monitors the power supply voltage. When the voltage falls below the threshold voltage (2.1V), the reset output is asserted, indicating a power failure or low voltage condition. The reset output remains active until the voltage rises above the threshold and the timeout period (140ms) elapses.

The manual reset input (MR) allows for external control of the reset signal. Pulling this pin low forces the reset output to be asserted, regardless of the monitored voltage level.

Detailed Application Field Plans

The MAX6425UK21+T is commonly used in various applications where reliable voltage monitoring and system reset functionality are required. Some potential application fields include:

1. Battery-Powered Devices: Portable electronics, IoT devices, and wearable gadgets can benefit from the low-power operation and accurate voltage monitoring provided by the MAX6425UK21+T.

2. Embedded Systems: Microcontroller-based systems, industrial automation equipment, and automotive electronics often require voltage supervision to ensure proper system initialization and reliable operation.

3. Power Management: Power supplies, battery chargers, and voltage regulators can utilize the MAX6425UK21+T to monitor the input voltage and trigger appropriate actions in case of power failures or abnormal conditions.

Detailed and Complete Alternative Models

• MAX6424UK26+T
• MAX6426UK29+T
• MAX6427UK30+T
• MAX6428UK31+T
• MAX6429UK32+T

These alternative models offer similar voltage monitoring and reset functionality with slight variations in specifications and package options. It is recommended to review the datasheets of these alternatives to determine the best fit for specific application requirements.

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