MAX691EWE+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)
Use: Power Supply Monitor
Characteristics: Low-power, precision voltage monitor with watchdog timer
Package: 16-pin wide SOIC (Small Outline Integrated Circuit)
Essence: Monitors the power supply voltage and provides a reset signal when the voltage falls below a specified threshold
Packaging/Quantity: Comes in a tube packaging with 25 units per tube

Specifications

Supply Voltage Range: 3.0V to 5.5V
Reset Threshold Voltage Options: 4.63V, 4.38V, 4.00V, 2.93V, or adjustable
Watchdog Timer Timeout Period: 1.6s, 3.2s, 6.4s, or adjustable
Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX691EWE+ has the following pin configuration:

VCC: Positive power supply input
GND: Ground reference
RESET: Active-low reset output
MR: Manual reset input
WDI: Watchdog timer input
GND: Ground reference
GND: Ground reference
GND: Ground reference
GND: Ground reference
GND: Ground reference
GND: Ground reference
GND: Ground reference
GND: Ground reference
GND: Ground reference
GND: Ground reference
VCC: Positive power supply input

Functional Features

Monitors the power supply voltage continuously
Generates a reset signal when the voltage drops below the specified threshold
Provides a watchdog timer to monitor system activity and generate a reset if necessary
Low-power consumption for energy-efficient applications
Adjustable reset threshold voltage and watchdog timer timeout period

Advantages and Disadvantages

Advantages: - Precise monitoring of power supply voltage - Flexible options for reset threshold voltage and watchdog timer timeout period - Low-power operation for energy efficiency - Compact 16-pin package for space-constrained designs

Disadvantages: - Limited to a maximum supply voltage of 5.5V - Not suitable for high-voltage applications

Working Principles

The MAX691EWE+ operates by continuously monitoring the power supply voltage. When the voltage falls below the specified threshold, it generates an active-low reset signal. This reset signal can be used to initiate a system reset or perform other necessary actions.

Additionally, the IC includes a watchdog timer that monitors system activity. If the system fails to provide a periodic input signal within the specified timeout period, the watchdog timer generates a reset signal to ensure system integrity.

Detailed Application Field Plans

The MAX691EWE+ is commonly used in various applications where reliable power supply monitoring is critical. Some potential application fields include:

Embedded Systems: Ensuring proper system initialization and recovery after power disruptions.
Industrial Automation: Monitoring power supply stability in control systems and machinery.
Medical Devices: Providing reliable reset functionality in medical equipment.
Automotive Electronics: Ensuring safe operation by monitoring power supply voltage in vehicle systems.
Consumer Electronics: Enhancing system reliability in devices such as routers, modems, and set-top boxes.

Detailed and Complete Alternative Models

MAX690EWE+: Similar to MAX691EWE+, but without the watchdog timer feature.
MAX693EWE+: Enhanced version with additional features like adjustable reset pulse width and debounced manual reset input.

Note: This is not an exhaustive list, and there may be other alternative models available from different manufacturers.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací MAX691EWE+ v technických řešeních

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

Q: What is the MAX691EWE+? A: The MAX691EWE+ is a microprocessor supervisory circuit that monitors the power supply voltage of a system and provides reset signals to the microcontroller or other digital ICs.
Q: What is the purpose of using the MAX691EWE+ in a technical solution? A: The MAX691EWE+ ensures reliable operation of microcontrollers by monitoring the power supply voltage and generating reset signals when the voltage falls below a certain threshold.
Q: How does the MAX691EWE+ monitor the power supply voltage? A: The MAX691EWE+ uses an internal voltage reference and comparator to compare the power supply voltage with a preset threshold. If the voltage drops below the threshold, it triggers a reset signal.
Q: Can I use the MAX691EWE+ with different microcontrollers? A: Yes, the MAX691EWE+ can be used with a wide range of microcontrollers and digital ICs as long as the voltage levels are compatible.
Q: What is the operating voltage range of the MAX691EWE+? A: The MAX691EWE+ operates within a voltage range of 1.8V to 5.5V.
Q: Does the MAX691EWE+ have any adjustable parameters? A: Yes, the MAX691EWE+ has an adjustable reset threshold voltage that can be set using external resistors.
Q: Can the MAX691EWE+ generate multiple reset signals for different ICs? A: Yes, the MAX691EWE+ has multiple reset outputs, allowing it to generate separate reset signals for different ICs in a system.
Q: Does the MAX691EWE+ have any additional features? A: Yes, the MAX691EWE+ includes a watchdog timer function that can be used to monitor the activity of the microcontroller and generate a reset if it hangs or stops functioning.
Q: Can I use the MAX691EWE+ in battery-powered applications? A: Yes, the low quiescent current consumption of the MAX691EWE+ makes it suitable for battery-powered applications where power efficiency is important.
Q: Are there any application notes or reference designs available for using the MAX691EWE+? A: Yes, Maxim Integrated provides application notes and reference designs that provide guidance on using the MAX691EWE+ in various technical solutions. These resources can be found on their website.