MAX809SQ293D2T1G

Product Overview

• Category: Integrated Circuits
• Use: Voltage Supervisors
• Characteristics: Low-power, microprocessor reset circuit
• Package: SOT-23-3
• Essence: Monitors the power supply voltage of a microprocessor and asserts a reset signal if the voltage drops below a predefined threshold
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.0V to 5.5V
• Reset Threshold Voltage: 2.93V
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 3µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX809SQ293D2T1G has three pins in the SOT-23-3 package:

1. VCC: Power supply input pin
2. GND: Ground pin
3. RESET: Reset output pin

Functional Features

• Monitors the power supply voltage and generates a reset signal when it falls below the specified threshold
• Provides a stable reset signal during power-up, power-down, and brownout conditions
• Debounced manual reset input for external system reset control
• Low quiescent current consumption for power-sensitive applications

Advantages

• Small form factor package allows for space-saving designs
• Wide supply voltage range enables compatibility with various microprocessors
• Accurate reset threshold ensures reliable operation
• Low quiescent current minimizes power consumption

Disadvantages

• Fixed reset threshold may not be suitable for all applications requiring different voltage levels
• Lack of adjustable timeout period limits flexibility in certain scenarios

Working Principles

The MAX809SQ293D2T1G operates by continuously monitoring the power supply voltage connected to the VCC pin. When the voltage drops below the predefined threshold of 2.93V, the RESET pin is asserted, indicating a reset condition. The reset signal remains active until the voltage rises above the threshold and the timeout period elapses.

Detailed Application Field Plans

The MAX809SQ293D2T1G is commonly used in microprocessor-based systems where reliable power supply monitoring and reset functionality are crucial. Some specific application fields include:

1. Embedded Systems: Provides a robust reset mechanism for microcontrollers, ensuring proper initialization during power-up.
2. Industrial Automation: Ensures stable operation of control systems by resetting the microprocessor in case of power fluctuations or brownout conditions.
3. Automotive Electronics: Safeguards critical electronic components by resetting the microcontroller when the supply voltage falls below the specified threshold.

Detailed and Complete Alternative Models

1. MAX809SQ293D1T1G: Similar to MAX809SQ293D2T1G but with a different package (SOT-323-3).
2. MAX809SQ293D3T1G: Similar to MAX809SQ293D2T1G but with a different reset threshold voltage (2.93V ± 1%).
3. MAX809SQ293D4T1G: Similar to MAX809SQ293D2T1G but with a different reset timeout period (280ms typical).

These alternative models offer similar functionality with slight variations in package type, reset threshold voltage, and timeout period.

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