MAX6439UTDHSD3+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 specified threshold.
  • Provides a reliable way to ensure proper operation of electronic devices by preventing them from operating in an undervoltage condition.
• Package: Thin SOT23-6 package
• Essence: Voltage monitoring and reset functionality in a compact form factor
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.5V to 5.5V
• Threshold Voltage Options: 2.63V, 2.93V, 3.08V, 4.38V, 4.63V, 4.88V
• Reset Timeout Period: Adjustable or Fixed options available
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 7µA (typical)

Detailed Pin Configuration

The MAX6439UTDHSD3+T has the following pin configuration:

1. GND: Ground connection
2. MR: Manual Reset input pin
3. RESET: Reset output pin
4. VCC: Power supply input
5. TH: Threshold voltage selection pin
6. NC: No Connection

Functional Features

• Voltage Monitoring: The MAX6439UTDHSD3+T continuously monitors the voltage level at the VCC pin.
• Reset Generation: When the voltage falls below the selected threshold voltage, the device generates a reset signal on the RESET pin.
• Manual Reset: The MR pin allows for manual reset control, overriding the automatic reset generation.
• Adjustable Timeout Period: Some variants of the MAX6439UTDHSD3+T allow for the adjustment of the reset timeout period.
• Low Power Consumption: The device operates with low quiescent current, minimizing power consumption.

Advantages and Disadvantages

Advantages: - Compact form factor - Wide supply voltage range - Multiple threshold voltage options - Adjustable or fixed reset timeout period - Manual reset capability - Low power consumption

Disadvantages: - Limited pin configuration options - Not suitable for high-voltage applications

Working Principles

The MAX6439UTDHSD3+T works by continuously monitoring the voltage level at the VCC pin. When the voltage falls below the selected threshold voltage, the device generates a reset signal on the RESET pin. This reset signal can be used to trigger a system reset, ensuring proper operation of electronic devices. The MR pin allows for manual reset control, overriding the automatic reset generation. The device operates with low quiescent current, making it suitable for battery-powered applications.

Detailed Application Field Plans

The MAX6439UTDHSD3+T is commonly used in various applications where voltage monitoring and reset functionality are required. Some typical application fields include:

1. Microcontrollers: Ensuring reliable operation of microcontroller-based systems by providing a reset signal when the power supply voltage drops below a certain threshold.
2. Industrial Control Systems: Preventing malfunction or data corruption in industrial control systems by resetting them in case of an undervoltage condition.
3. Embedded Systems: Protecting embedded systems from operating in an undervoltage state, which could lead to unpredictable behavior or damage.
4. Battery-Powered Devices: Monitoring battery voltage levels and initiating a reset when the battery voltage drops too low, preventing unreliable operation.

Detailed and Complete Alternative Models

Some alternative models that offer similar voltage monitoring and reset functionality are:

1. MAX809: Voltage Monitor with Manual Reset
2. LTC2937: Adjustable Voltage Supervisor with Power-Fail Output
3. TPS3808: Precision Voltage Supervisor with Programmable Delay Time

These alternative models provide different features and specifications, allowing designers to choose the most suitable option for their specific application requirements.

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