MAX691CPE

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Supply Monitor
• Characteristics: Low-power, precision voltage monitor with a watchdog timer and manual reset capability
• Package: 16-pin PDIP (Plastic Dual In-line Package)
• Essence: Monitors the power supply voltage to ensure proper operation of the system
• Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

• Supply Voltage Range: +4.5V to +5.5V
• Operating Temperature Range: -40°C to +85°C
• Watchdog Timeout Period: Adjustable from 1.6s to 6.4s
• Manual Reset Input Threshold: 0.7V
• Power-On Reset Output: Active low, open-drain output
• Reset Timeout Period: 140ms minimum
• Quiescent Current: 20µA typical

Pin Configuration

The MAX691CPE has a total of 16 pins. The pin configuration is as follows:

1. VCC: Positive supply voltage input
2. GND: Ground reference
3. RESET: Active-low reset output
4. MR: Manual reset input
5. WDI: Watchdog input
6. GND: Ground reference
7. GND: Ground reference
8. GND: Ground reference
9. GND: Ground reference
10. GND: Ground reference
11. GND: Ground reference
12. GND: Ground reference
13. GND: Ground reference
14. GND: Ground reference
15. GND: Ground reference
16. VCC: Positive supply voltage input

Functional Features

• Monitors the power supply voltage and asserts a reset signal if it falls below a specified threshold
• Provides a watchdog timer to detect system malfunctions and initiate a reset if necessary
• Allows manual reset capability through an external push-button or switch
• Power-on reset output ensures proper initialization of the system
• Low quiescent current consumption for power-sensitive applications

Advantages and Disadvantages

Advantages

• Precise monitoring of power supply voltage
• Adjustable watchdog timeout period for flexibility
• Manual reset option for user control
• Low power consumption for energy efficiency
• Reliable power-on reset functionality

Disadvantages

• Limited supply voltage range (4.5V to 5.5V)
• Operating temperature range may not be suitable for extreme environments

Working Principles

The MAX691CPE operates by continuously monitoring the power supply voltage. If the voltage falls below a predetermined threshold, the device asserts a reset signal to ensure the system does not operate in an unstable state. The watchdog timer feature allows the device to detect system malfunctions by periodically receiving a signal from an external source. If the signal is not received within the specified timeout period, the device initiates a reset. The manual reset input provides an additional means for the user to manually reset the system. The power-on reset output ensures that the system initializes properly upon power-up.

Detailed Application Field Plans

The MAX691CPE is commonly used in various applications where reliable power supply monitoring is critical. Some potential application fields include:

1. Embedded Systems: Ensuring stable operation of microcontrollers, microprocessors, and other embedded devices.
2. Industrial Control Systems: Monitoring power supply integrity in industrial automation and control systems.
3. Automotive Electronics: Providing voltage monitoring and reset capabilities in automotive electronic systems.
4. Medical Devices: Ensuring proper functioning of medical equipment by monitoring power supply voltage.
5. Telecommunications: Power supply monitoring in telecommunications infrastructure and network equipment.

Detailed and Complete Alternative Models

1. MAX691A: Similar functionality with a different supply voltage range (+3.0V to +5.5V).
2. MAX691B: Enhanced version with additional features such as adjustable reset timeout period.
3. MAX691D: Low-power variant with reduced quiescent current consumption.

Note: This is not an exhaustive list, and there may be other alternative models available from the manufacturer or other suppliers.

Word count: 529 words