MAX809SN120T1G

Product Overview

• Category: Integrated Circuit
• Use: Voltage Monitor
• Characteristics: Low-power, Precision, Reset Output
• Package: SOT-23
• Essence: Supervisory Circuit
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Threshold Voltage Options: 1.20V, 1.62V, 2.32V, 2.93V, 3.08V, 4.63V
• Reset Timeout Period Options: 140ms, 560ms, 1120ms, 2240ms
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX809SN120T1G has a standard SOT-23 package with three pins:

1. GND (Ground): Connected to the ground reference of the circuit.
2. RESET (Reset Output): Provides a reset signal when the monitored voltage falls below the threshold.
3. VCC (Supply Voltage): Connected to the positive supply voltage.

Functional Features

• Voltage Monitoring: Monitors the supply voltage and generates a reset signal when it falls below the programmed threshold.
• Precision: Offers accurate voltage monitoring with various threshold options.
• Low-Power: Consumes minimal power during operation, making it suitable for battery-powered applications.
• Reset Output: Provides a reset signal to the system, ensuring proper initialization after a power failure or voltage drop.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with different systems. - Multiple threshold voltage and reset timeout period options provide flexibility in design. - Low-power consumption extends battery life in portable devices. - Small SOT-23 package enables space-saving integration.

Disadvantages: - Limited to voltage monitoring and reset functionality, not suitable for complex power management applications. - Requires an external pull-up resistor for the RESET pin.

Working Principles

The MAX809SN120T1G operates as a supervisory circuit by continuously monitoring the supply voltage. When the voltage falls below the programmed threshold, the internal comparator triggers the reset output, which remains active until the voltage rises above the threshold or the reset timeout period elapses. The device ensures proper system initialization and prevents erratic behavior during power fluctuations.

Detailed Application Field Plans

The MAX809SN120T1G finds applications in various fields, including:

1. Microcontrollers: Provides reliable reset signals to microcontroller units, ensuring proper startup and preventing data corruption.
2. Embedded Systems: Ensures stable operation of embedded systems by monitoring the power supply and initiating a reset when necessary.
3. Industrial Control Systems: Guards against voltage drops in industrial control systems, preventing malfunctions and ensuring safe operation.
4. Automotive Electronics: Monitors the vehicle's power supply, protecting sensitive electronics from voltage transients and ensuring reliable performance.

Detailed and Complete Alternative Models

1. MAX809SEUR+: Similar to MAX809SN120T1G but with a different package (SOT-143) and higher temperature range (-40°C to +125°C).
2. MAX809TEUR+: Offers the same functionality as MAX809SN120T1G but with a different package (SOT-23-3) and wider supply voltage range (1.6V to 5.5V).
3. MAX809TEXR+: Provides extended temperature range (-40°C to +125°C) and a smaller package (SC70-3) while maintaining the same features as MAX809SN120T1G.

(Note: These alternative models are just a few examples; there are several other options available in the market.)

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