Texas Instruments

LM809M3X-4.00

LM809M3X-4.00 Description

The LM809M3X-4.00 is a single-channel voltage supervisor IC designed for surface-mount applications. Manufactured by Texas Instruments, this device is part of the LM809 family and is housed in a compact SOT23-3 package. It features a voltage threshold of 4V, ensuring reliable monitoring of a single voltage rail. The LM809M3X-4.00 is designed to provide a reset signal when the monitored voltage falls below the specified threshold, with a reset timeout of at least 140ms. This feature is crucial for maintaining system stability and preventing erratic behavior during power fluctuations.

LM809M3X-4.00 Features

• Voltage Monitoring: The LM809M3X-4.00 is designed to monitor a single voltage rail with a threshold of 4V. This makes it ideal for applications where a specific voltage level needs to be maintained for optimal performance.
• Reset Functionality: The device provides an active-low reset output, ensuring that the system can be safely reset when the monitored voltage drops below the threshold. The reset timeout is a minimum of 140ms, providing ample time for the system to stabilize.
• Surface Mount Compatibility: The LM809M3X-4.00 is packaged in a surface-mount SOT23-3 format, making it suitable for modern PCB designs that require compact and reliable components.
• Moisture Sensitivity Level: With an MSL rating of 1 (Unlimited), the LM809M3X-4.00 is highly resistant to moisture, ensuring long-term reliability in various environmental conditions.
• Compliance and Standards: The LM809M3X-4.00 is REACH unaffected and RoHS3 compliant, adhering to stringent environmental and safety standards. It is also classified under ECCN EAR99 and HTSUS 8542.39.0001, facilitating international trade and regulatory compliance.
• Packaging: The device is available in tape and reel (TR) packaging, which is ideal for automated assembly processes.

LM809M3X-4.00 Applications

The LM809M3X-4.00 is well-suited for a variety of applications where reliable voltage monitoring and system reset functionality are critical. Some specific use cases include:

• Power Supply Monitoring: In power supply units, the LM809M3X-4.00 can monitor the main voltage rail to ensure it remains within the specified range, providing a reset signal if the voltage drops below 4V.
• Embedded Systems: For embedded systems that require a stable power supply, the LM809M3X-4.00 can help prevent system crashes and data corruption by resetting the system when voltage levels are insufficient.
• Consumer Electronics: In devices such as smartphones, tablets, and laptops, the LM809M3X-4.00 can be used to monitor the battery voltage, ensuring that the system shuts down gracefully when the battery is depleted.
• Industrial Control Systems: In industrial environments, the LM809M3X-4.00 can monitor critical power supplies to prevent equipment damage and ensure consistent operation.

Conclusion of LM809M3X-4.00

The LM809M3X-4.00 is a robust and reliable voltage supervisor IC designed for surface-mount applications. Its single-channel voltage monitoring capability, combined with a 4V threshold and active-low reset output, makes it an ideal choice for a wide range of applications. The device's compact SOT23-3 package, moisture sensitivity level of 1, and compliance with REACH and RoHS3 standards further enhance its suitability for modern electronic designs. While the LM809M3X-4.00 is now considered obsolete, its legacy as a dependable voltage supervisor continues to make it a valuable component in various electronic systems.