ADM691AARUZ

Product Overview

Category

ADM691AARUZ belongs to the category of integrated circuits (ICs).

Use

This product is commonly used for monitoring and resetting microprocessor-based systems.

Characteristics

• Monitors power supply voltage levels
• Provides a reset signal to the microprocessor when necessary
• Offers a watchdog timer function to detect system malfunctions
• Operates in a wide temperature range
• Low power consumption

Package

ADM691AARUZ is available in a small outline integrated circuit (SOIC) package.

Essence

The essence of ADM691AARUZ lies in its ability to ensure the reliable operation of microprocessor-based systems by monitoring power supply voltages, providing reset signals, and detecting system malfunctions.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Watchdog Timer Timeout Period: Adjustable from 1.6ms to 6.4s
• Reset Timeout Period: Fixed at 140ms
• Power-On Reset Threshold: 4.65V (typical)
• Manual Reset Input: Active-low
• Power Supply Current: 20μA (typical)

Detailed Pin Configuration

ADM691AARUZ has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. MR: Manual reset input (active-low)
4. RESET: Reset output
5. WDI: Watchdog timer input
6. GND: Ground reference
7. VCC: Power supply input

Functional Features

1. Power Supply Monitoring: ADM691AARUZ continuously monitors the power supply voltage levels to ensure they remain within the specified range.
2. Reset Signal Generation: When the power supply voltage drops below the reset threshold or the watchdog timer times out, ADM691AARUZ generates a reset signal to restart the microprocessor.
3. Watchdog Timer: The built-in watchdog timer detects system malfunctions by monitoring the WDI input. If no valid signal is received within the timeout period, a reset signal is generated.
4. Manual Reset: The manual reset input allows for an external reset signal to be applied, overriding the internal monitoring functions.

Advantages and Disadvantages

Advantages

• Reliable power supply monitoring
• Automatic reset signal generation
• Built-in watchdog timer for system malfunction detection
• Wide operating temperature range
• Low power consumption

Disadvantages

• Fixed reset timeout period may not be suitable for all applications
• Limited number of alternative models available in the market

Working Principles

ADM691AARUZ operates by continuously monitoring the power supply voltage levels using an internal voltage comparator. If the voltage drops below the reset threshold or the watchdog timer times out, the reset output is activated, causing the microprocessor to restart. The watchdog timer function ensures that the microprocessor remains operational by detecting any system malfunctions. The manual reset input allows for an external reset signal to be applied, overriding the internal monitoring functions.

Detailed Application Field Plans

ADM691AARUZ finds application in various fields where reliable operation of microprocessor-based systems is crucial. Some potential application areas include: - Industrial automation - Automotive electronics - Medical devices - Consumer electronics - Communication systems

Detailed and Complete Alternative Models

While ADM691AARUZ is a popular choice for power supply monitoring and reset functions, there are several alternative models available in the market. Some notable alternatives include: - MAX691A - LTC2910 - TPS3808

These alternative models offer similar functionalities and can be considered based on specific application requirements.

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