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MAX638AESA-T
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MAX638AESA-T

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: 8-pin small outline integrated circuit (SOIC)
  • Essence: Monitors the voltage level of a power supply and generates a reset signal when the voltage falls below a specified threshold
  • Packaging/Quantity: Available in tape and reel packaging, with a quantity of 2500 units per reel

Specifications

  • Supply Voltage Range: 1.2V to 5.5V
  • Threshold Voltage Options: 2.5V, 3.0V, 3.3V, 5.0V
  • Reset Timeout Period: Adjustable from 1ms to 640ms
  • Operating Temperature Range: -40°C to +85°C
  • Quiescent Current: 10µA (typical)

Pin Configuration

The MAX638AESA-T has the following pin configuration:

  1. GND (Ground)
  2. MR (Manual Reset Input)
  3. RESET (Reset Output)
  4. VCC (Supply Voltage)
  5. TH (Threshold Voltage Selection)
  6. CT (Reset Timeout Period Selection)
  7. TR (Trigger Input)
  8. OUT (Output)

Functional Features

  • Voltage Monitoring: The MAX638AESA-T continuously monitors the supply voltage and compares it to the selected threshold voltage.
  • Reset Generation: When the supply voltage falls below the threshold voltage, the MAX638AESA-T generates a reset signal on the RESET pin.
  • Manual Reset: The MR pin allows for manual resetting of the device.
  • Adjustable Timeout Period: The CT pin enables the user to adjust the reset timeout period according to their application requirements.
  • Trigger Input: The TR pin provides an external trigger input to initiate a reset signal.

Advantages and Disadvantages

Advantages: - Low-power consumption - Precision voltage monitoring - Adjustable reset timeout period - Manual reset capability - Small package size

Disadvantages: - Limited threshold voltage options - Single-channel monitoring (not suitable for multi-channel applications)

Working Principles

The MAX638AESA-T operates by continuously monitoring the supply voltage using an internal voltage comparator. When the supply voltage falls below the selected threshold voltage, the comparator triggers a reset signal. The reset signal remains active until the supply voltage rises above the threshold voltage or a manual reset is initiated.

The reset timeout period can be adjusted using an external capacitor connected to the CT pin. This allows for customization of the reset duration based on specific application requirements.

Application Field Plans

The MAX638AESA-T is commonly used in various electronic systems that require reliable power supply monitoring and reset functionality. Some potential application fields include:

  1. Microcontrollers: Ensuring proper initialization and system stability during power-up.
  2. Industrial Control Systems: Providing fault detection and recovery capabilities.
  3. Automotive Electronics: Monitoring critical voltage levels to prevent system failures.
  4. Battery-Powered Devices: Protecting against undervoltage conditions and optimizing battery life.
  5. Home Automation: Enabling safe operation and automatic recovery after power outages.

Alternative Models

  1. MAX638BESA-T: Similar to MAX638AESA-T but with additional features such as adjustable hysteresis and watchdog timer functionality.
  2. MAX638CESA-T: Higher temperature range variant (-40°C to +125°C) suitable for harsh environments.
  3. MAX638DESA-T: Dual-channel version for monitoring two independent power supplies simultaneously.

These alternative models offer different specifications and features to cater to diverse application requirements.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van MAX638AESA-T in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of MAX638AESA-T in technical solutions:

  1. Q: What is the MAX638AESA-T? A: The MAX638AESA-T is a voltage monitor and reset circuit that provides power supply supervision for microcontrollers, DSPs, and other digital systems.

  2. Q: What is the purpose of the MAX638AESA-T? A: The MAX638AESA-T ensures proper system operation by monitoring the power supply voltage and generating a reset signal when the voltage falls below a specified threshold.

  3. Q: How does the MAX638AESA-T work? A: The MAX638AESA-T compares the input voltage with a reference voltage and generates a reset signal if the input voltage drops below the reference voltage.

  4. Q: What is the operating voltage range of the MAX638AESA-T? A: The MAX638AESA-T operates over a voltage range of 1.6V to 6V.

  5. Q: Can the MAX638AESA-T be used with different microcontrollers or digital systems? A: Yes, the MAX638AESA-T can be used with a wide range of microcontrollers, DSPs, and other digital systems as long as the operating voltage requirements are met.

  6. Q: Does the MAX638AESA-T have any adjustable parameters? A: Yes, the MAX638AESA-T has an adjustable reset threshold voltage that can be set using external resistors.

  7. Q: Can the MAX638AESA-T generate both active-high and active-low reset signals? A: Yes, the MAX638AESA-T can be configured to generate either an active-high or active-low reset signal based on the application requirements.

  8. Q: Is the MAX638AESA-T suitable for battery-powered applications? A: Yes, the MAX638AESA-T has a low quiescent current and is suitable for battery-powered applications where power consumption is critical.

  9. Q: Does the MAX638AESA-T have any built-in protection features? A: Yes, the MAX638AESA-T includes features like power-on reset delay and glitch immunity to ensure reliable operation in noisy environments.

  10. Q: What package does the MAX638AESA-T come in? A: The MAX638AESA-T is available in an 8-pin small outline (SO) package.

Please note that these answers are general and may vary depending on the specific application and requirements.