MAX6421US30+T

Product Overview

• Category: Integrated Circuit
• Use: Voltage Supervisor
• Characteristics: Low-power, precision voltage monitoring
• Package: SOT23-6
• Essence: Monitors the power supply voltage and provides a reset signal when the voltage falls below a specified threshold.
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Reset Threshold Voltage: 3.0V
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 2µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX6421US30+T has a total of six pins arranged as follows:

```

---

| | --| VCC GND |-- Pin 1: Ground (GND) --| RESET OUT |-- Pin 2: Reset Output (RESET OUT) --| MR |-- Pin 3: Manual Reset Input (MR) --| TH |-- Pin 4: Threshold Input (TH) --| VCC |-- Pin 5: Power Supply (VCC) --| GND |-- Pin 6: Ground (GND) |___________| ```

Functional Features

• Monitors the power supply voltage continuously.
• Provides a reset signal when the voltage falls below the specified threshold.
• Offers a manual reset input for immediate system reset.
• Low quiescent current ensures minimal power consumption.
• Wide operating temperature range allows usage in various environments.

Advantages and Disadvantages

Advantages: - Precise voltage monitoring ensures reliable operation. - Low-power design minimizes energy consumption. - Small package size enables space-saving integration. - Wide supply voltage range offers flexibility in different applications.

Disadvantages: - Limited reset timeout period may not be suitable for all scenarios. - SOT23-6 package may require additional handling precautions during assembly.

Working Principles

The MAX6421US30+T is a voltage supervisor integrated circuit that monitors the power supply voltage of a system. It compares the supply voltage with a preset threshold voltage and generates a reset signal when the voltage falls below this threshold. The reset signal remains active until the supply voltage rises above the threshold and a timeout period elapses.

The device also includes a manual reset input (MR) that allows an immediate system reset when triggered. This feature provides flexibility in controlling the reset operation.

Detailed Application Field Plans

The MAX6421US30+T finds applications in various fields where reliable voltage monitoring and system reset functionality are required. Some potential application areas include:

1. Microcontrollers: Ensuring proper operation by monitoring the power supply voltage and initiating a reset if necessary.
2. Industrial Control Systems: Providing voltage supervision to critical components, preventing malfunctions due to low supply voltage.
3. Battery-Powered Devices: Monitoring battery voltage to prevent damage caused by excessive discharge.
4. Automotive Electronics: Ensuring stable power supply to sensitive electronic systems, enhancing overall reliability.

Detailed and Complete Alternative Models

1. MAX6422US30+T: Similar to MAX6421US30+T but with a different reset threshold voltage of 3.08V.
2. MAX6423US30+T: Voltage supervisor with adjustable reset threshold voltage.
3. MAX6424US30+T: Dual voltage supervisor with two independent reset outputs.

These alternative models offer similar functionality with slight variations in specifications, providing options to suit specific requirements.

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