MAX1232EWE+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Reset Generator
• Characteristics: Low-power, precision voltage monitor with watchdog timer and manual reset input
• Package: 16-pin WSOIC package
• Essence: Provides a reliable reset signal to microcontrollers and other digital systems
• Packaging/Quantity: Tape and reel packaging, 2500 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Watchdog Timeout Period: Adjustable from 1.6ms to 6.4s
• Manual Reset Input Threshold Voltage: 0.7V
• Active-Low RESET Output Voltage: 0.3V
• Quiescent Current: 10µA (typical)

Pin Configuration

The MAX1232EWE+T has the following pin configuration:

1. VCC: Supply Voltage
2. GND: Ground
3. MR: Manual Reset Input
4. RESET: Active-Low Reset Output
5. CAP+: Positive Terminal of External Capacitor
6. CAP-: Negative Terminal of External Capacitor
7. TH: Watchdog Timeout Period Selection
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: Supply Voltage

Functional Features

• Precision monitoring of supply voltages
• Programmable watchdog timer for system supervision
• Manual reset input for external system control
• Active-low reset output for resetting the system
• Power-on reset generator with fixed delay time
• Low quiescent current for power-sensitive applications

Advantages and Disadvantages

Advantages: - Provides reliable reset signal to ensure proper system operation - Adjustable watchdog timeout period for flexibility - Low-power consumption for energy-efficient designs - Small form factor package for space-constrained applications

Disadvantages: - Limited supply voltage range (1.2V to 5.5V) - Operating temperature range may not be suitable for extreme environments

Working Principles

The MAX1232EWE+T is designed to monitor the supply voltage of a digital system. It continuously compares the monitored voltage with a preset threshold and generates a reset signal when the voltage falls below the threshold. The device also includes a watchdog timer that must be periodically reset by a software or hardware action to prevent system lock-up.

When the supply voltage drops below the threshold, the active-low reset output is asserted, signaling the microcontroller or digital system to perform a reset. The watchdog timer can be adjusted to different timeout periods, allowing the system to define the maximum time interval between consecutive resets.

The manual reset input provides an external control mechanism to initiate a reset. When this input is activated, the reset output is asserted regardless of the supply voltage or watchdog timer status.

Detailed Application Field Plans

The MAX1232EWE+T is commonly used in various applications where reliable reset generation is critical. Some of the typical application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper initialization and system recovery after power-up or brownout conditions.
2. Embedded Systems: Providing a reset signal to ensure correct operation and prevent system lock-up.
3. Industrial Control Systems: Monitoring and resetting critical components to maintain system integrity and reliability.
4. Communication Equipment: Resetting network devices and ensuring continuous operation during power fluctuations.
5. Automotive Electronics: Resetting electronic control units (ECUs) and safety systems for reliable vehicle operation.

Detailed and Complete Alternative Models

1. MAX1232ESA+: 8-pin SOIC package, similar specifications and features as MAX1232EWE+T.
2. MAX1232CSA+: 8-pin SOIC package, similar specifications and features as MAX1232EWE+T.
3. MAX1232EPA+: 8-pin DIP package, similar specifications and features as MAX1232EWE+T.

These alternative models offer different package options while maintaining the same functionality and performance as the MAX1232EWE+T.

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