MAX641ACPA+ - English Editing Encyclopedia Entry

Product Overview

Category

MAX641ACPA+ belongs to the category of integrated circuits (ICs).

Use

This product is commonly used as a voltage monitor and reset circuit.

Characteristics

• Voltage monitoring range: 1.8V to 5V
• Adjustable reset threshold voltage
• Low supply current: 15µA (typical)
• Active-low reset output
• Power-on reset delay time: 100ms (typical)

Package

The MAX641ACPA+ is available in an 8-pin PDIP (Plastic Dual In-Line Package) package.

Essence

The essence of MAX641ACPA+ lies in its ability to monitor voltage levels and provide a reset signal when the voltage falls below a certain threshold.

Packaging/Quantity

This product is typically packaged in tubes or reels, with a quantity of 25 units per tube/reel.

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Reset Threshold Voltage Range: 1.2V to VCC-0.6V

Detailed Pin Configuration

1. GND: Ground connection
2. MR: Manual reset input
3. VCC: Positive power supply
4. RESET: Active-low reset output
5. TH: Threshold adjust pin
6. TRIG: Trigger input
7. CT: Capacitor connection for reset delay
8. NC: No connection

Functional Features

• Voltage Monitoring: The MAX641ACPA+ continuously monitors the input voltage and compares it with the adjustable threshold voltage.
• Reset Signal Generation: When the input voltage falls below the threshold voltage, the active-low reset output is asserted, indicating the need for a system reset.
• Manual Reset: The manual reset input (MR) allows for an external reset signal to override the voltage monitoring function.
• Adjustable Threshold: The threshold voltage can be adjusted using the TH pin, allowing customization based on specific application requirements.
• Reset Delay: The CT pin is used to connect an external capacitor, which introduces a delay in generating the reset signal after power-on.

Advantages and Disadvantages

Advantages

• Wide operating voltage range
• Adjustable threshold voltage
• Low supply current consumption
• Active-low reset output for easy integration with other components

Disadvantages

• Limited number of pins for additional functionalities
• Requires an external capacitor for reset delay functionality

Working Principles

The MAX641ACPA+ operates by continuously monitoring the input voltage. When the voltage falls below the adjustable threshold voltage, the active-low reset output is asserted, indicating the need for a system reset. The threshold voltage can be adjusted using the TH pin, providing flexibility for different voltage level requirements. Additionally, the CT pin allows for the introduction of a reset delay by connecting an external capacitor.

Detailed Application Field Plans

The MAX641ACPA+ finds applications in various fields, including:

1. Microcontrollers: Ensuring proper system reset during power fluctuations or voltage drops.
2. Power Supply Units: Monitoring voltage levels to protect sensitive components from undervoltage conditions.
3. Industrial Control Systems: Providing reliable reset signals for critical control circuits.
4. Automotive Electronics: Ensuring safe operation by resetting systems when voltage levels are insufficient.
5. Battery-Powered Devices: Preventing damage to batteries by initiating a reset when voltage drops below a certain threshold.

Detailed and Complete Alternative Models

1. MAX642ACSA+: Similar to MAX641ACPA+, but available in a smaller 8-pin SOIC (Small Outline Integrated Circuit) package.
2. MAX643ACPA+: Offers additional features such as adjustable reset timeout and watchdog timer functionality.
3. MAX644ACPA+: Provides a wider operating voltage range and adjustable threshold voltage with higher precision.

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