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, 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:

```

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| | --| RESET |-- --| GND |-- --| MR |-- --| VCC |-- --| WDI |-- --| RESET_OUT |-- --| VCC |-- |___________| ```

Functional Features

1. Power-On Reset: The MAX708TCUA+T monitors the supply voltage and asserts the RESET signal until the voltage reaches the specified threshold.
2. Watchdog Timer: It provides a mechanism to reset the microprocessor if it fails to toggle the WDI input within the specified timeout period.
3. Manual Reset Input: The MR pin allows an external signal to assert the RESET signal, overriding the internal monitoring circuitry.

Advantages and Disadvantages

Advantages: - Low-power consumption - Small package size - Wide operating voltage range - Easy integration into existing designs

Disadvantages: - Limited watchdog timeout period - Single reset threshold voltage

Working Principles

The MAX708TCUA+T operates by continuously monitoring the supply voltage and the WDI input. When the supply voltage falls below the reset threshold, or if the WDI input is not toggled within the watchdog timeout period, the RESET signal is asserted. This ensures that the microprocessor is properly reset in case of power-on or software failures.

Detailed Application Field Plans

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

1. Embedded Systems: Provides a robust reset mechanism for microcontrollers in embedded systems.
2. Industrial Automation: Ensures proper initialization of microprocessors in industrial control systems.
3. Automotive Electronics: Guards against software glitches in automotive electronic control units (ECUs).
4. Medical Devices: Enables safe and reliable operation of microprocessors in medical equipment.
5. Consumer Electronics: Protects microcontrollers in consumer electronic devices from erratic behavior.

Detailed and Complete Alternative Models

• MAX705ESA+: 8-pin SOIC package, similar functionality to MAX708TCUA+T
• MAX809SEUR-T: SOT23-3 package, low-power microprocessor reset circuit
• MAX811TEUS-T: SOT143 package, microprocessor supervisory circuit with manual reset

These alternative models offer similar features and can be considered as replacements for the MAX708TCUA+T in different applications.

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