MAX6831SHUT+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, high-accuracy, reset output, watchdog timer
• Package: SOT-23-6
• Essence: Monitors the power supply voltage and provides a reset signal to the microcontroller or other digital system when the voltage drops below a specified threshold.
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage Options: 2.5V, 3.0V, 3.3V, 3.6V
• Reset Timeout Period: Adjustable from 1.6ms to 6.4s
• Quiescent Current: 1.5µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX6831SHUT+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) --| WDI |-- Pin 4: Watchdog Timer Input (WDI) --| TH |-- Pin 5: Threshold Voltage Selection (TH) --| VCC |-- Pin 6: Positive Power Supply (VCC) |___________| ```

Functional Features

1. Voltage Monitoring: The MAX6831SHUT+T continuously monitors the power supply voltage and generates a reset signal when it falls below the selected threshold voltage.
2. Reset Output: The device provides an active-low reset output signal that can be connected to the microcontroller or other digital system to initiate a reset.
3. Watchdog Timer: The MAX6831SHUT+T includes a watchdog timer input (WDI) that can be used to monitor the activity of the microcontroller. If the WDI input is not toggled within the specified timeout period, a reset signal is generated.
4. Manual Reset Input: The MR pin allows for manual resetting of the device by pulling it low.
5. Adjustable Timeout Period: The reset timeout period can be adjusted using an external capacitor, allowing flexibility in setting the desired delay time.

Advantages and Disadvantages

Advantages

• Low-power operation, suitable for battery-powered applications.
• High accuracy in voltage monitoring.
• Small package size enables space-saving designs.
• Adjustable reset timeout period provides flexibility.

Disadvantages

• Limited number of threshold voltage options.
• Requires an external capacitor for adjusting the timeout period.

Working Principles

The MAX6831SHUT+T operates by comparing the power supply voltage with the selected threshold voltage. When the voltage drops below the threshold, the reset output is activated, initiating a system reset. The device also includes a watchdog timer that monitors the activity of the microcontroller. If the WDI input is not toggled within the specified timeout period, a reset signal is generated.

Application Field Plans

The MAX6831SHUT+T is commonly used in various electronic systems where reliable voltage monitoring and reset functionality are required. Some potential application fields include:

1. Microcontrollers and Digital Systems: Ensuring proper system initialization and preventing erratic behavior due to voltage fluctuations.
2. Battery-Powered Devices: Protecting against undervoltage conditions that could lead to data corruption or system malfunction.
3. Industrial Control Systems: Providing a fail-safe mechanism to ensure stable operation and prevent damage to equipment.
4. Automotive Electronics: Monitoring the power supply voltage in automotive applications to prevent system failures.

Alternative Models

1. MAX6830SHUT+T: Similar to MAX6831SHUT+T but with a different package (SOT-23-5) and fewer features.
2. MAX6832SHUT+T: Offers additional features such as a manual reset input and adjustable threshold voltage options.
3. MAX6833SHUT+T: Provides a higher number of threshold voltage options and a wider operating temperature range.

Note: The above alternative models are suggested based on similar functionality and specifications, but it is recommended to refer to the manufacturer's datasheets for detailed information.

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