MAX6834FXRD0+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Supply Supervisor
• Characteristics: Low-power, voltage monitoring, watchdog timer
• Package: 6-pin SOT23
• Essence: Provides power supply supervision and reset generation for microprocessors and other digital systems.
• Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Reset Threshold Voltage Options: 2.63V, 3.08V, 3.30V, 4.38V
• Watchdog Timeout Period: 1.6s, 3.2s, 6.4s, 12.8s
• Quiescent Current: 7µA (typical)

Pin Configuration

The MAX6834FXRD0+T has the following pin configuration:

```

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| | --|1 |-- GND --|2 |-- RESET --|3 |-- MR --|4 |-- VCC --|5 |-- WDI |____| ```

1. GND: Ground connection
2. RESET: Active-low reset output
3. MR: Manual reset input
4. VCC: Positive power supply
5. WDI: Watchdog input

Functional Features

• Monitors the power supply voltage and generates a reset signal when it falls below a specified threshold.
• Includes a watchdog timer that requires periodic input pulses to prevent system lock-up.
• Provides manual reset capability through the MR pin.
• Low quiescent current consumption for power-sensitive applications.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Multiple reset threshold voltage options provide flexibility in different applications. - Low-power operation helps conserve energy. - Small package size enables space-saving designs.

Disadvantages: - Limited number of pin configurations may restrict certain system requirements. - Lack of advanced features compared to more specialized power supply supervisor ICs.

Working Principles

The MAX6834FXRD0+T monitors the power supply voltage using an internal voltage reference and comparator. When the voltage falls below the selected threshold, the RESET pin is asserted low, indicating a system reset. The watchdog timer requires periodic input pulses on the WDI pin to prevent system lock-up. If the pulses are not received within the specified timeout period, the RESET pin is activated. The MR pin provides manual reset capability by asserting it low.

Detailed Application Field Plans

The MAX6834FXRD0+T is commonly used in various applications where reliable power supply monitoring and reset generation are critical. Some potential application fields include:

1. Microcontroller-based Systems: Provides essential supervision for microcontrollers, ensuring proper operation and preventing system crashes due to power supply issues.
2. Industrial Control Systems: Ensures continuous operation of industrial control systems by monitoring power supply integrity and generating resets when necessary.
3. Embedded Systems: Offers reliable power supply supervision for embedded systems, enhancing overall system reliability and stability.
4. Automotive Electronics: Used in automotive electronics to monitor power supply voltages and generate resets to prevent malfunctions or damage.
5. Consumer Electronics: Suitable for consumer electronic devices that require robust power supply monitoring, such as smart home appliances and portable devices.

Detailed and Complete Alternative Models

1. MAX6816EUS+T: Similar power supply supervisor IC with additional features like adjustable reset timeout and active-low push-pull reset output.
2. MAX6820UK+T: Power supply supervisor IC with adjustable reset threshold voltage and watchdog timer, available in a SOT23-5 package.
3. MAX6384XS26D3+: Voltage monitor with adjustable reset threshold and watchdog timer, offered in a SOT143 package.
4. MAX811SEUS+T: Microprocessor supervisory circuit with adjustable reset threshold voltage and watchdog timer, available in a SOT143 package.

These alternative models provide similar functionality to the MAX6834FXRD0+T but may offer additional features or different package options to suit specific application requirements.

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