MAX691ACSE+TG002

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor and Reset Circuit
• Characteristics:
  • Monitors the power supply voltage of a system and generates a reset signal when the voltage drops below a specified threshold.
  • Provides a reliable way to ensure proper system initialization and prevent erratic behavior due to insufficient power supply.
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Voltage monitoring and reset functionality in a compact IC package.
• Packaging/Quantity: Tape and Reel, 2500 units per reel.

Specifications

• Supply Voltage Range: 3V to 5.5V
• Threshold Voltage Options: 4.65V, 4.40V, 4.00V, 2.93V, 2.63V, 2.32V, 2.06V, 1.85V
• Reset Timeout Period: Adjustable from 140ms to 1120ms
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX691ACSE+TG002 IC has the following pin configuration:

```

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| | --| VCC | --| GND | --| MR | --| RESET | --| RESET OUT | --| GND | --| VCC | |___________| ```

Functional Features

1. Voltage Monitoring: The MAX691ACSE+TG002 continuously monitors the power supply voltage.
2. Reset Signal Generation: When the voltage drops below the specified threshold, the IC generates a reset signal.
3. Adjustable Timeout Period: The reset timeout period can be adjusted to suit the application requirements.
4. Power-On Reset: The IC provides a power-on reset signal during system startup to ensure proper initialization.
5. Manual Reset Input: The MR pin allows for manual reset control.

Advantages and Disadvantages

Advantages: - Compact size and integrated functionality save board space. - Adjustable timeout period offers flexibility in system design. - Reliable voltage monitoring prevents erratic behavior due to insufficient power supply.

Disadvantages: - Limited threshold voltage options may not cover all voltage requirements. - Requires additional external components for proper operation.

Working Principles

The MAX691ACSE+TG002 operates by continuously monitoring the power supply voltage using an internal voltage comparator. When the voltage drops below the specified threshold, the IC generates a reset signal. The reset signal remains active until the voltage rises above the threshold or the adjustable timeout period elapses. The IC also provides a power-on reset signal during system startup to ensure proper initialization.

Application Field Plans

The MAX691ACSE+TG002 is commonly used in various electronic systems where reliable voltage monitoring and reset functionality are required. Some application fields include:

1. Microcontrollers and Microprocessors: Ensures proper initialization and prevents erratic behavior during power fluctuations.
2. Industrial Control Systems: Provides reliable reset functionality for critical equipment.
3. Automotive Electronics: Monitors the vehicle's power supply voltage and generates a reset signal if necessary.
4. Medical Devices: Ensures proper functioning and prevents data corruption during power supply variations.
5. Consumer Electronics: Protects sensitive components from voltage fluctuations and ensures stable operation.

Alternative Models

1. MAX811: Voltage Monitor and Reset Circuit with Fixed Threshold Options.
2. MAX809: Voltage Monitor and Reset Circuit with Push-Pull Output.
3. MAX638: Voltage Monitor and Reset Circuit with Watchdog Timer Functionality.

These alternative models offer similar voltage monitoring and reset functionality but may have different package options, threshold voltage ranges, or additional features.

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