MAX641AESA+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor and Reset Circuit
• Characteristics: Low-power, precision voltage monitoring, reset output
• Package: 8-pin small outline integrated circuit (SOIC)
• Essence: Provides a reliable way to monitor the voltage level of a system and generate a reset signal when necessary.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Threshold Voltage Options: 2.5V, 3.0V, 3.3V, 5.0V
• Reset Timeout Period: Adjustable from 1ms to 640ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA (typical)

Pin Configuration

The MAX641AESA+T has the following pin configuration:

1. VCC: Supply voltage input
2. GND: Ground reference
3. MR: Manual reset input
4. RESET: Reset output
5. TH: Threshold voltage selection input
6. CT: Capacitor connection for reset timeout adjustment
7. GND: Ground reference
8. VCC: Supply voltage input

Functional Features

• Voltage Monitoring: The MAX641AESA+T continuously monitors the supply voltage and compares it to the selected threshold voltage.
• Reset Output: When the supply voltage drops below the threshold voltage, the reset output is activated, indicating a power failure or low voltage condition.
• Manual Reset Input: The manual reset input allows for an external reset signal to override the voltage monitoring function.
• Adjustable Reset Timeout: The reset timeout period can be adjusted using an external capacitor connected to the CT pin.
• Low Power Consumption: The IC operates with a low quiescent current of only 10µA, making it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Precise voltage monitoring - Adjustable reset timeout period - Low power consumption - Small package size

Disadvantages: - Limited threshold voltage options - Manual reset input may require additional external components

Working Principles

The MAX641AESA+T works by comparing the supply voltage to the selected threshold voltage. When the supply voltage drops below the threshold voltage, indicating a power failure or low voltage condition, the reset output is activated. The reset output remains active until the supply voltage rises above the threshold voltage again or a manual reset signal is applied.

The reset timeout period can be adjusted using an external capacitor connected to the CT pin. This allows for customization of the time delay between the voltage dropping below the threshold and the activation of the reset output.

Detailed Application Field Plans

The MAX641AESA+T is commonly used in various applications where reliable voltage monitoring and reset functionality are required. Some potential application fields include:

1. Microcontrollers: Ensuring proper system initialization and preventing data corruption during power fluctuations.
2. Industrial Control Systems: Providing a reliable reset signal to restart systems after power interruptions.
3. Automotive Electronics: Monitoring critical voltage levels to prevent damage to sensitive electronic components.
4. Battery-Powered Devices: Protecting batteries from over-discharge by triggering a reset when the voltage drops below a safe threshold.
5. Home Automation: Enabling automatic system recovery and reconfiguration after power outages.

Detailed and Complete Alternative Models

1. MAX641BESA+T: Similar to MAX641AESA+T, but with different threshold voltage options (1.8V, 2.5V, 3.0V, 3.3V).
2. MAX642AESA+T: Voltage monitor and reset circuit with adjustable reset timeout period and push-pull reset output.
3. MAX643AESA+T: Voltage monitor and reset circuit with fixed threshold voltage options (2.5V, 3.0V, 3.3V) and adjustable reset timeout.

These alternative models offer similar functionality to the MAX641AESA+T but may have different specifications or additional features to suit specific application requirements.

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