MAX1232EWE

Product Overview

• Category: Integrated Circuit (IC)
• Use: Reset Circuit
• Characteristics: Low-power, Precision Voltage Monitor
• Package: 16-pin Wide SOIC (Small Outline Integrated Circuit)
• Essence: Provides a reliable reset signal to microcontrollers and other digital systems
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.0V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Reset Timeout Period: Adjustable from 1ms to 640ms
• Active-Low RESET Output
• Low Quiescent Current: 10µA (typical)

Pin Configuration

The MAX1232EWE has a 16-pin wide SOIC package with the following pin configuration:

1. VCC - Positive Power Supply
2. GND - Ground
3. MR - Manual Reset Input
4. RESET - Active-Low Reset Output
5. CAP+ - External Capacitor Connection
6. CAP- - External Capacitor Connection
7. TH - Threshold Input
8. GND - Ground
9. GND - Ground
10. GND - Ground
11. GND - Ground
12. GND - Ground
13. GND - Ground
14. GND - Ground
15. GND - Ground
16. VCC - Positive Power Supply

Functional Features

• Monitors the power supply voltage and asserts a reset signal when the voltage drops below a specified threshold.
• Provides a debounced manual reset input for system initialization.
• Offers an adjustable reset timeout period to accommodate different system requirements.
• Low quiescent current consumption makes it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Precise voltage monitoring ensures reliable system reset. - Adjustable reset timeout period allows flexibility in system design. - Low quiescent current minimizes power consumption.

Disadvantages: - Limited to a maximum supply voltage of 5.5V. - Requires external capacitors for proper operation.

Working Principles

The MAX1232EWE operates by continuously monitoring the power supply voltage using an internal voltage reference and comparator. When the voltage drops below a preset threshold, the reset output is asserted low, indicating a system reset. The reset signal remains active until the voltage rises above the threshold or the reset timeout period elapses. The manual reset input can be used to force a system reset regardless of the power supply voltage.

Application Field Plans

The MAX1232EWE is commonly used in various applications where reliable system reset functionality is required. Some potential application fields include:

1. Microcontroller Systems: Provides a robust reset signal to ensure proper initialization and reliable operation of microcontrollers.
2. Embedded Systems: Enables safe and controlled system restarts in embedded systems, preventing erratic behavior due to power fluctuations.
3. Industrial Automation: Ensures consistent system reset in industrial automation equipment, improving overall reliability and uptime.
4. Consumer Electronics: Enhances the stability and reliability of consumer electronic devices by providing a reliable reset mechanism.
5. Automotive Electronics: Supports proper system initialization and recovery in automotive electronics, enhancing safety and performance.

Alternative Models

• MAX1232ESA: 8-pin SOIC package, similar specifications and features.
• MAX1232CSA+: 8-pin SOIC package, extended temperature range (-40°C to +125°C).
• MAX1232MJA: 18-pin CERDIP (Ceramic Dual In-Line Package), wider operating temperature range (-55°C to +125°C).

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