MAX821TUS+TG002

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: High accuracy, low power consumption, small package size
• Package: SOT-23-5
• Essence: Monitors voltage levels and provides reset signals to microprocessors and other digital systems
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Reset Threshold Voltage Options: 2.93V, 3.08V, 3.15V, 4.38V, 4.63V, 4.75V
• Reset Timeout Period Options: 140ms, 280ms, 560ms, 1120ms
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX821TUS+TG002 IC has the following pin configuration:

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• Pin 1: GND (Ground)
• Pin 2: RESET (Reset Output)
• Pin 3: MR (Manual Reset Input)
• Pin 4: VCC (Supply Voltage)
• Pin 5: RESET (Reset Output)

Functional Features

• Monitors supply voltage and generates a reset signal when it falls below the specified threshold
• Provides a manual reset input for external control of the reset function
• Adjustable reset threshold voltage and timeout period options for flexibility in different applications
• Low quiescent current consumption for power-sensitive designs
• Small package size allows for space-constrained applications

Advantages and Disadvantages

Advantages: - High accuracy in monitoring voltage levels - Low power consumption - Flexible reset threshold voltage and timeout period options - Small package size for space-constrained designs

Disadvantages: - Limited number of reset threshold voltage and timeout period options - Requires external components for proper operation

Working Principles

The MAX821TUS+TG002 operates by continuously monitoring the supply voltage. When the voltage falls below the programmed threshold, it generates a reset signal to indicate a power failure or an out-of-range condition. The reset signal remains active until the supply voltage rises above the threshold and the reset timeout period elapses.

Detailed Application Field Plans

The MAX821TUS+TG002 is commonly used in various applications where reliable voltage monitoring and system reset functionality are required. Some specific application fields include:

1. Microcontroller Systems: Ensures proper system initialization and prevents erratic behavior during power-up or voltage fluctuations.
2. Industrial Control Systems: Provides reliable reset signals to critical control systems, preventing data corruption or improper operation during power disturbances.
3. Automotive Electronics: Monitors battery voltage and triggers system resets when the voltage drops below a safe operating level, protecting sensitive electronic components.
4. Power Management Systems: Enables efficient power management by monitoring supply voltages and initiating appropriate actions based on voltage levels.

Detailed and Complete Alternative Models

1. MAX809: Similar voltage supervisor IC with adjustable reset threshold voltage and timeout period options. Available in different package sizes.
2. MAX823: Voltage supervisor IC with additional features like watchdog timer and manual reset input. Offers wider operating temperature range.
3. MAX638: Voltage supervisor IC with fixed reset threshold voltage options and integrated power-on reset delay circuitry. Suitable for cost-sensitive applications.

These alternative models provide similar functionality to the MAX821TUS+TG002 and can be considered based on specific application requirements.

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