MAX6381XR29D3-T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor and Reset Circuit
• Characteristics:
  • Monitors the voltage level of a power supply and generates a reset signal when the voltage falls below a certain threshold.
  • Provides a reliable way to ensure proper system operation by resetting the microcontroller or other digital circuits during power-up, power-down, or brownout conditions.
• Package: XR29 (6-pin SOT23)
• Essence: Voltage monitoring and reset functionality in a compact package.
• Packaging/Quantity: Available in tape and reel packaging with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Threshold Voltage Options: 2.93V
• Reset Timeout Period: Fixed 140ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 7µA (typical)

Pin Configuration

The MAX6381XR29D3-T has the following pin configuration:

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Pin Description: 1. GND: Ground connection 2. RESET: Active-low reset output 3. MR: Manual reset input 4. VCC: Positive supply voltage 5. TH: Threshold voltage selection 6. NC: No connection

Functional Features

1. Voltage Monitoring: The MAX6381XR29D3-T continuously monitors the supply voltage and compares it with the threshold voltage.
2. Reset Generation: When the supply voltage drops below the threshold voltage, the IC generates an active-low reset signal on the RESET pin.
3. Manual Reset: The MR pin allows for manual reset capability, overriding the automatic reset function.
4. Fixed Reset Timeout: The reset signal remains active for a fixed timeout period of 140ms after the supply voltage rises above the threshold voltage.
5. Low Quiescent Current: The IC consumes minimal current (7µA typical) during normal operation, ensuring power efficiency.

Advantages and Disadvantages

Advantages: - Compact package size allows for space-saving integration into various electronic systems. - Reliable voltage monitoring and reset functionality ensure proper system operation. - Manual reset capability provides flexibility in system control. - Low quiescent current minimizes power consumption.

Disadvantages: - Fixed reset timeout period may not be suitable for all applications requiring different timeout durations. - Limited threshold voltage options may restrict compatibility with specific voltage levels.

Working Principles

The MAX6381XR29D3-T operates by continuously monitoring the supply voltage using an internal voltage reference. When the supply voltage falls below the threshold voltage set by the TH pin, the IC generates an active-low reset signal on the RESET pin. This reset signal remains active for a fixed timeout period of 140ms after the supply voltage rises above the threshold voltage. The MR pin allows for manual reset capability, overriding the automatic reset function.

Detailed Application Field Plans

The MAX6381XR29D3-T finds applications in various electronic systems where reliable voltage monitoring and reset functionality are crucial. Some potential application fields include:

1. Microcontroller Systems: Ensuring proper initialization and system stability during power-up and brownout conditions.
2. Industrial Control Systems: Providing reliable reset functionality for critical digital circuits in industrial automation equipment.
3. Automotive Electronics: Monitoring and resetting microcontrollers or other digital components in automotive systems to prevent malfunctions.
4. Battery-Powered Devices: Protecting sensitive electronics from voltage drops during battery discharge.

Detailed and Complete Alternative Models

1. MAX6381XR29D5-T: Similar to MAX6381XR29D3-T but with a threshold voltage option of 2.93V.
2. MAX6381XR29D6-T: Similar to MAX6381XR29D3-T but with a threshold voltage option of 2.93V and a longer reset timeout period of 280ms.
3. MAX6381XR29D7-T: Similar to MAX6381XR29D3-T but with a threshold voltage option of 2.93V and a shorter reset timeout period of 70ms.

These alternative models provide flexibility in selecting the desired threshold voltage and reset timeout period based on specific application requirements.

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