MAX6421XS28+T

Product Overview

• Category: Integrated Circuits (ICs)
• Use: Voltage Supervisors
• Characteristics: Low-Power, Single/Dual/Triple-Voltage Monitoring Circuit
• Package: SC-70-3
• Essence: The MAX6421XS28+T is a voltage supervisor IC designed to monitor the power supply voltage levels in electronic systems and provide reset signals when the voltage falls below or rises above predefined thresholds.
• Packaging/Quantity: Tape & Reel (3000 pieces per reel)

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Options: 2.8V
• Reset Timeout Period: 140ms
• Quiescent Current: 1µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX6421XS28+T has three pins:

1. GND: Ground connection.
2. RESET: Output pin that provides a reset signal when the monitored voltage falls below the threshold.
3. VCC: Power supply input.

Functional Features

• Monitors the power supply voltage and generates a reset signal when it goes below the specified threshold.
• Provides a stable reset output during power-up and power-down sequences.
• Offers a fixed reset timeout period to ensure proper system initialization.
• Low quiescent current consumption for power-sensitive applications.
• Wide operating voltage range allows compatibility with various power supply levels.

Advantages and Disadvantages

Advantages: - Compact SC-70-3 package for space-constrained designs. - Low-power operation extends battery life in portable devices. - Fixed reset timeout period ensures reliable system startup.

Disadvantages: - Limited reset threshold options may not suit all voltage monitoring requirements. - Single voltage monitoring capability may not be sufficient for complex systems.

Working Principles

The MAX6421XS28+T operates by comparing the monitored voltage with a predefined threshold. When the voltage falls below the threshold, the reset output is activated, indicating a power failure or an unstable voltage level. The reset signal remains active until the voltage rises above the threshold and the reset timeout period elapses.

Detailed Application Field Plans

The MAX6421XS28+T is commonly used in various electronic systems where reliable voltage monitoring is crucial. Some application fields include:

1. Battery-Powered Devices: Portable electronics, such as smartphones, tablets, and wearables, benefit from the low-power operation and stable reset functionality of the MAX6421XS28+T.
2. Industrial Control Systems: Voltage supervision is essential in industrial control systems to ensure proper operation and prevent damage due to power fluctuations.
3. Automotive Electronics: The MAX6421XS28+T can be employed in automotive applications to monitor the vehicle's power supply and trigger appropriate actions in case of voltage anomalies.

Detailed and Complete Alternative Models

• MAX6421US26+T
• MAX6421XS23+T
• MAX6421XS29+T
• MAX6421XS30+T
• MAX6421XS31+T

These alternative models offer different reset threshold options and package configurations, allowing designers to choose the most suitable option for their specific requirements.

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