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MAX691EWE
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MAX691EWE

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Monitor and Reset Circuit
  • Characteristics: Low-power, precision voltage monitor with a built-in reset timer
  • Package: 16-pin wide SOIC (Small Outline Integrated Circuit) package
  • Essence: Provides reliable power supply monitoring and reset generation for microprocessors and other digital systems
  • Packaging/Quantity: Available in tape and reel packaging, with a quantity of 250 units per reel

Specifications

  • Supply Voltage Range: 1.2V to 5.5V
  • Operating Temperature Range: -40°C to +85°C
  • Reset Threshold Voltage Options: 4.63V, 4.38V, 4.00V, or adjustable
  • Reset Timeout Period Options: 140ms, 280ms, 560ms, or adjustable
  • Quiescent Current: 15µA (typical)

Pin Configuration

The MAX691EWE has the following pin configuration:

  1. VCC: Power supply input
  2. GND: Ground reference
  3. RESET: Active-low reset output
  4. MR: Manual reset input
  5. TH: Threshold adjust input
  6. CT: Capacitor connection for reset timeout period adjustment
  7. GND: Ground reference
  8. RESET: Active-low reset output
  9. RESET: Active-low reset output
  10. GND: Ground reference
  11. GND: Ground reference
  12. GND: Ground reference
  13. GND: Ground reference
  14. GND: Ground reference
  15. GND: Ground reference
  16. VCC: Power supply input

Functional Features

  • Monitors the power supply voltage and generates a reset signal when the voltage falls below a specified threshold.
  • Includes a built-in reset timer that ensures the reset signal remains active for a specific period after the power supply voltage rises above the threshold.
  • Provides a manual reset input for immediate system reset.
  • Offers an adjustable threshold option to accommodate different voltage requirements.
  • Low quiescent current consumption ensures minimal power usage.

Advantages and Disadvantages

Advantages: - Reliable voltage monitoring and reset generation for microprocessors and digital systems. - Adjustable threshold and timeout options provide flexibility in different applications. - Low-power consumption helps conserve energy.

Disadvantages: - Limited to a specific package type (16-pin wide SOIC). - Requires external capacitors for timeout period adjustment.

Working Principles

The MAX691EWE operates by continuously monitoring the power supply voltage. When the voltage falls below the specified threshold, the reset output is activated, indicating a power failure. The built-in reset timer keeps the reset output active for a specific period after the voltage rises above the threshold, ensuring a stable system restart. The manual reset input allows for immediate system reset when required.

Application Field Plans

The MAX691EWE is commonly used in various applications, including:

  1. Microprocessor-based systems
  2. Embedded systems
  3. Industrial control systems
  4. Communication equipment
  5. Automotive electronics
  6. Power management systems

Alternative Models

Alternative models that offer similar functionality to the MAX691EWE include:

  1. MAX811: Voltage monitor and reset circuit with adjustable threshold and timeout options.
  2. MAX1232: Precision voltage monitor and reset circuit with watchdog timer functionality.
  3. ADM708: Supervisory circuit with adjustable reset threshold and timeout options.

These alternative models can be considered based on specific application requirements and compatibility with existing designs.

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Luettele 10 yleistä kysymystä ja vastausta, jotka liittyvät MAX691EWE :n soveltamiseen teknisissä ratkaisuissa

Sure! Here are 10 common questions and answers related to the application of MAX691EWE in technical solutions:

  1. Q: What is MAX691EWE? A: MAX691EWE is a microprocessor supervisory circuit that monitors the power supply voltage of a microcontroller or other digital systems.

  2. Q: What is the purpose of MAX691EWE? A: The purpose of MAX691EWE is to ensure proper operation of the microcontroller by monitoring the power supply voltage and generating a reset signal when it falls below a certain threshold.

  3. Q: How does MAX691EWE work? A: MAX691EWE continuously monitors the power supply voltage using an internal voltage reference and comparator. When the voltage drops below a preset threshold, it asserts the reset signal to the microcontroller.

  4. Q: Can MAX691EWE be used with different microcontrollers? A: Yes, MAX691EWE can be used with a wide range of microcontrollers and digital systems as long as the voltage requirements are within its specified range.

  5. Q: What is the operating voltage range of MAX691EWE? A: The operating voltage range of MAX691EWE is typically between 1.8V and 5.5V.

  6. Q: Does MAX691EWE have any adjustable parameters? A: Yes, MAX691EWE has an adjustable reset threshold voltage, which can be set using external resistors.

  7. Q: Can MAX691EWE generate a power-on reset signal? A: Yes, MAX691EWE has a power-on reset (POR) feature that generates a reset signal when the power supply is first applied.

  8. Q: Is MAX691EWE capable of providing a watchdog timer function? A: No, MAX691EWE does not have a built-in watchdog timer. It is solely designed for power supply monitoring and reset generation.

  9. Q: Can MAX691EWE be used in battery-powered applications? A: Yes, MAX691EWE has a low quiescent current and can be used in battery-powered applications to monitor the power supply voltage.

  10. Q: Are there any specific precautions to consider when using MAX691EWE? A: It is important to ensure that the power supply voltage does not exceed the maximum specified voltage range of MAX691EWE. Additionally, proper decoupling capacitors should be used near the device to minimize noise and ensure stable operation.

I hope these questions and answers provide you with a good understanding of the application of MAX691EWE in technical solutions!