MAX6422US26+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-Power, Precision, Reset Output
• Package: SOT23-6
• Essence: Monitors the voltage level of a system and provides a reset signal when the voltage falls below a certain threshold.
• Packaging/Quantity: Tape & Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.5V to 5.5V
• Reset Threshold Voltage: 2.63V
• Reset Timeout Period: 140ms
• Quiescent Current: 3µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX6422US26+T has a total of six pins arranged as follows:

___________ | | VCC | 1 6 | GND RST | 2 5 | RESET GND | 3 4 | MR |___________|

1. VCC: Power supply input pin.
2. RST: Active-low reset output pin.
3. GND: Ground reference pin.
4. MR: Manual reset input pin.
5. RESET: Open-drain reset output pin.

Functional Features

• Monitors the system voltage and generates a reset signal when the voltage drops below the specified threshold.
• Provides a manual reset option through the MR pin.
• The reset output is open-drain, allowing for easy interfacing with other devices.
• Low quiescent current makes it suitable for battery-powered applications.
• Precision voltage monitoring ensures accurate detection of voltage variations.

Advantages and Disadvantages

Advantages

• Low-power consumption extends battery life in portable devices.
• Precision voltage monitoring ensures reliable system operation.
• Small package size allows for space-efficient designs.
• Open-drain reset output simplifies interfacing with other components.

Disadvantages

• Limited to a specific voltage threshold (2.63V) and timeout period (140ms).
• Not suitable for applications requiring different voltage thresholds or longer timeout periods.

Working Principles

The MAX6422US26+T operates by continuously monitoring the voltage level at the VCC pin. When the voltage falls below the preset threshold of 2.63V, the reset output (RST) is activated, indicating a low-voltage condition. The reset output remains active until the voltage rises above the threshold or a manual reset signal is applied to the MR pin.

Detailed Application Field Plans

The MAX6422US26+T is commonly used in various electronic systems where voltage supervision is critical. Some typical application fields include:

1. Battery-Powered Devices: Ensures proper shutdown or system reset when the battery voltage drops below a safe level.
2. Microcontroller Systems: Provides a reliable reset signal during power-up or voltage fluctuations, ensuring stable operation.
3. Industrial Control Systems: Monitors power supply voltages in control panels, preventing malfunctions due to voltage variations.
4. Automotive Electronics: Protects sensitive components from voltage dips or spikes, enhancing overall system reliability.

Detailed and Complete Alternative Models

1. MAX6423US26+T: Similar to MAX6422US26+T but with a different reset threshold voltage (2.93V).
2. MAX6424US26+T: Offers adjustable reset threshold voltage through an external resistor.
3. MAX6425US26+T: Provides additional features like watchdog timer and manual reset input debounce.

These alternative models offer flexibility in terms of voltage thresholds and additional functionalities, catering to a wider range of application requirements.

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