MAX821SUS+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor
• Characteristics: Low-power, Precision, Adjustable Threshold
• Package: SOT-143
• Essence: Monitors voltage levels and provides an output signal based on the threshold set by the user.
• Packaging/Quantity: Tape & Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Threshold Voltage Range: 1.25V to 5V
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 3µA (typical)
• Output Type: Active-Low Open-Drain
• Accuracy: ±1.5% (typical)

Pin Configuration

The MAX821SUS+T has a total of 4 pins in the SOT-143 package:

1. GND: Ground connection
2. TH: Threshold pin for setting the voltage threshold
3. OUT: Output pin that provides the monitored voltage status
4. VCC: Supply voltage input

Functional Features

• Monitors the voltage level at the TH pin and compares it with the threshold voltage set by the user.
• Provides an active-low open-drain output signal at the OUT pin when the monitored voltage falls below the threshold.
• Adjustable threshold voltage allows flexibility in monitoring different voltage levels.
• Low quiescent current makes it suitable for battery-powered applications.
• Wide supply voltage range enables compatibility with various power sources.

Advantages and Disadvantages

Advantages

• Precise voltage monitoring with adjustable threshold.
• Low power consumption.
• Small form factor package.
• Wide operating temperature range.
• Easy integration into existing circuits.

Disadvantages

• Limited number of pins for additional functionality.
• Output signal is active-low open-drain, requiring external pull-up resistor.

Working Principles

The MAX821SUS+T operates by comparing the voltage at the TH pin with the threshold voltage set by the user. When the monitored voltage falls below the threshold, the OUT pin provides an active-low open-drain output signal. This signal can be used to trigger other circuitry or devices based on the voltage level.

Detailed Application Field Plans

The MAX821SUS+T finds applications in various fields where voltage monitoring is crucial. Some potential application areas include:

1. Battery-Powered Devices: Ensuring proper battery voltage levels to prevent over-discharge and damage.
2. Power Management Systems: Monitoring power supply voltages to protect sensitive components from voltage fluctuations.
3. Industrial Control Systems: Detecting abnormal voltage conditions in machinery and triggering appropriate actions.
4. Automotive Electronics: Monitoring vehicle battery voltage to prevent starting issues and ensure proper charging.

Detailed and Complete Alternative Models

1. MAX823SUS+T: Similar to MAX821SUS+T but with a higher accuracy of ±1% (typical).
2. MAX824SUS+T: Offers adjustable hysteresis feature in addition to voltage monitoring.
3. MAX825SUS+T: Provides a push-pull output instead of open-drain, eliminating the need for an external pull-up resistor.

These alternative models offer similar functionality with slight variations to cater to specific requirements.

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