Introducing the LM809M3X-3.08 Voltage Supervisor

The LM809M3X-3.08 from Texas Instruments is a precision microprocessor (μP) system reset controller designed to manage power supply and brown-out conditions in digital systems. It provides a critical function by monitoring the system voltage and initiating a reset to prevent system errors or damage when the voltage drops below a predetermined threshold.

Key Features

• Voltage Threshold: The device comes with a factory-programmed threshold of 3.08V, suitable for systems that operate around the common 3.3V supply level, ensuring compatibility with a wide range of microprocessors and digital systems.
• Reset Timeout: Upon detecting an under-voltage condition, it asserts a reset signal for a minimum of 240ms (typical), providing ample time for the system to stabilize upon power-up or during voltage transients.
• Low Power Consumption: Designed for power-sensitive applications, the LM809M3X-3.08 boasts a low quiescent current, which is essential for battery-operated devices.
• Compact SOT-23 Package: The device is available in a small SOT-23 package, making it an ideal choice for space-constrained applications.
• Temperature Range: It operates over a wide temperature range, making it suitable for various industrial and consumer applications.

Applications

The LM809M3X-3.08 is versatile and can be used in a variety of applications, including:

• Portable/Battery-Powered Equipment
• Microprocessor/Microcontroller Systems
• Computers and Computer Peripherals
• Intelligent Instruments
• Automotive Systems

Reliability and Protection

With its built-in hysteresis to prevent erratic reset operation when the input voltage is close to the threshold, the LM809M3X-3.08 ensures system reliability. This voltage supervisor is an essential component for maintaining system integrity and preventing data corruption during adverse power conditions. Its quick response to under-voltage events safeguards the system's processors and other sensitive components, making it a reliable choice for designers looking to enhance system stability and extend product lifespan.

For detailed specifications and application notes, designers are encouraged to consult the datasheet and Texas Instruments' technical support resources.