MAX690AESA+ - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuits (ICs)

Use: The MAX690AESA+ is a precision, low-power, microprocessor supervisory circuit that monitors the power supply voltage of a microprocessor-based system. It provides reset output during power-up, power-down, and brownout conditions.

Characteristics: - Precision monitoring of power supply voltage - Low-power consumption - Reset output during power-up, power-down, and brownout conditions

Package: SOIC-8

Essence: The MAX690AESA+ is an essential component in microprocessor-based systems as it ensures reliable operation by monitoring the power supply voltage and providing reset signals when necessary.

Packaging/Quantity: The MAX690AESA+ is available in tape and reel packaging with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Reset Threshold Voltage Options: 4.63V, 4.38V, 4.00V, or adjustable
• Reset Timeout Period Options: 140ms, 280ms, 560ms, or adjustable

Pin Configuration

The MAX690AESA+ has the following pin configuration:

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

Functional Features

• Precision monitoring of power supply voltage to ensure stable operation of microprocessor-based systems.
• Reset output signal is activated during power-up, power-down, and brownout conditions, providing a reliable reset mechanism for the microprocessor.
• Manual reset input allows for external control of the reset function.
• Low-power consumption ensures minimal impact on overall system power requirements.

Advantages and Disadvantages

Advantages: - Precise monitoring of power supply voltage enhances system reliability. - Reset output during various power conditions ensures proper initialization of the microprocessor. - Manual reset input provides flexibility in controlling the reset function. - Low-power consumption minimizes impact on overall system power requirements.

Disadvantages: - Limited reset threshold voltage options may not cater to all specific system requirements. - Fixed or limited reset timeout period options may not be suitable for all applications.

Working Principles

The MAX690AESA+ operates by continuously monitoring the power supply voltage. When the voltage falls below the specified threshold, indicating a power-down or brownout condition, the reset output is activated. This signal remains active until the power supply voltage rises above the threshold, ensuring proper initialization of the microprocessor.

The manual reset input allows for an external control signal to override the internal monitoring circuit and activate the reset output. This feature enables system designers to implement custom reset sequences or perform manual resets when required.

Detailed Application Field Plans

The MAX690AESA+ finds application in various microprocessor-based systems where reliable power supply monitoring and reset functionality are crucial. Some potential application fields include:

1. Embedded Systems: The MAX690AESA+ ensures stable operation of microcontrollers and other embedded systems by providing accurate power supply monitoring and reset signals.

2. Industrial Automation: In industrial automation systems, the MAX690AESA+ safeguards the integrity of critical processes by monitoring power supply voltage and initiating proper system resets during power fluctuations.

3. Medical Devices: Medical devices rely on precise and reliable operation. The MAX690AESA+ contributes to the overall reliability of medical equipment by monitoring power supply voltage and ensuring proper initialization of microprocessors.

4. Automotive Electronics: In automotive applications, the MAX690AESA+ plays a vital role in maintaining the stability and integrity of electronic control units (ECUs) by providing accurate power supply monitoring and reset functionality.

Detailed and Complete Alternative Models

1. MAX809: The MAX809 is another microprocessor supervisory circuit offered by Maxim Integrated. It provides similar power supply monitoring and reset functionality but with different specifications and package options.

2. LTC2937: The LTC2937, manufactured by Linear Technology, is a precision voltage supervisor with adjustable reset thresholds and timeout periods. It offers additional flexibility compared to the MAX690AESA+.

3. TPS3808: Texas Instruments' TPS3808 is a low-power microprocessor supervisory circuit that features adjustable reset thresholds and timeout periods. It is available in various package options to suit different application requirements.

These alternative models provide similar functionality to the MAX