MAX708TCUA-T

Product Overview

Category: Integrated Circuit (IC)
Use: Voltage Supervisor
Characteristics: Low-power, microprocessor reset circuit
Package: 8-pin µMAX® package
Essence: Provides power-on reset and watchdog timer functions for microprocessors
Packaging/Quantity: Tape and Reel packaging, 2500 units per reel

Specifications

Supply Voltage Range: 1.0V to 5.5V
Reset Threshold Voltage: 4.63V
Watchdog Timeout Period: 1.6s
Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX708TCUA-T has the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | GND | Ground | | 2 | RESET | Reset Output| | 3 | MR | Manual Reset Input | | 4 | VCC | Supply Voltage | | 5 | WDI | Watchdog Timer Input | | 6 | GND | Ground | | 7 | GND | Ground | | 8 | VCC | Supply Voltage |

Functional Features

Provides a power-on reset signal during power-up and power-down conditions
Monitors the supply voltage and asserts the reset output when it falls below the reset threshold voltage
Includes a watchdog timer that requires periodic input pulses to prevent system lock-up
Offers a manual reset input for immediate system reset
Low quiescent current consumption, suitable for battery-powered applications

Advantages and Disadvantages

Advantages

Ensures reliable system startup by providing a power-on reset signal
Protects microprocessors from voltage fluctuations and brownout conditions
Prevents system lock-up with the watchdog timer functionality
Low-power consumption extends battery life in portable devices

Disadvantages

Limited supply voltage range (1.0V to 5.5V)
Fixed reset threshold voltage (4.63V)
Watchdog timeout period cannot be adjusted

Working Principles

The MAX708TCUA-T monitors the supply voltage and generates a reset signal when it falls below the reset threshold voltage. This ensures that the microprocessor starts up correctly and avoids any undefined behavior during power-up or power-down conditions.

Additionally, the IC includes a watchdog timer that requires periodic input pulses to prevent system lock-up. If the microprocessor fails to provide these pulses within the specified timeout period, the MAX708TCUA-T asserts the reset output, forcing a system reset.

The manual reset input allows for an immediate system reset, overriding the normal operation of the IC.

Detailed Application Field Plans

The MAX708TCUA-T is commonly used in various applications where reliable microprocessor operation is critical. Some typical application fields include:

Embedded Systems: Provides power-on reset and watchdog timer functions for microcontrollers and other embedded systems.
Industrial Control Systems: Ensures proper startup and prevents system lock-up in industrial automation and control systems.
Automotive Electronics: Protects automotive microprocessors from voltage fluctuations and brownout conditions.
Medical Devices: Enables reliable operation of microcontrollers in medical equipment, ensuring patient safety.
Consumer Electronics: Used in portable devices like smartphones, tablets, and gaming consoles to maintain stable operation during power transitions.

Detailed and Complete Alternative Models

MAX705CSA+: Similar functionality, different package (8-pin SOIC)
MAX706TESA+: Adjustable reset threshold voltage, different package (8-pin SOIC)
MAX707ESA+: Higher supply voltage range (1.8V to 5.5V), different package (8-pin SOIC)
MAX809SEUR+: Push-pull output, different package (SOT23-3)

These alternative models offer similar voltage supervisor functionality with slight variations in features and specifications.

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Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van MAX708TCUA-T in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of MAX708TCUA-T in technical solutions:

Q: What is the MAX708TCUA-T? A: The MAX708TCUA-T is a microprocessor supervisory circuit that monitors the power supply voltage of a system and generates a reset signal when the voltage falls below a predetermined threshold.
Q: What is the purpose of using the MAX708TCUA-T in a technical solution? A: The MAX708TCUA-T ensures reliable operation of microprocessors by providing a reset signal during power-up, power-down, and brownout conditions, preventing erratic behavior or data corruption.
Q: How does the MAX708TCUA-T detect a low voltage condition? A: The MAX708TCUA-T uses an internal voltage reference and comparator to monitor the power supply voltage. When the voltage drops below a specified threshold, it triggers the reset signal.
Q: Can the MAX708TCUA-T be used with different power supply voltages? A: Yes, the MAX708TCUA-T can operate with a wide range of power supply voltages, typically from 1.0V to 5.5V.
Q: Does the MAX708TCUA-T have any adjustable parameters? A: No, the MAX708TCUA-T does not have any adjustable parameters. It operates based on its fixed threshold voltage.
Q: Can the MAX708TCUA-T be used in battery-powered applications? A: Yes, the MAX708TCUA-T is suitable for battery-powered applications as it has a low quiescent current and operates over a wide temperature range.
Q: Is the MAX708TCUA-T available in different package options? A: Yes, the MAX708TCUA-T is available in a 8-pin µMAX package, which is a small and space-saving package.
Q: Can the MAX708TCUA-T be used in automotive applications? A: Yes, the MAX708TCUA-T is suitable for automotive applications as it meets the requirements for automotive temperature range and reliability.
Q: Does the MAX708TCUA-T have any additional features? A: Yes, the MAX708TCUA-T includes a manual reset input and a watchdog timer output, providing additional functionality for system monitoring.
Q: Are there any application notes or reference designs available for the MAX708TCUA-T? A: Yes, Maxim Integrated provides application notes and reference designs that offer guidance on using the MAX708TCUA-T in various technical solutions. These resources can be found on their website.