LM809M3X-2.93/NOPB

The LM809M3X-2.93/NOPB is a voltage supervisor integrated circuit (IC) manufactured by Texas Instruments. It is designed to monitor power supply voltages and provide a reset signal to microcontrollers and other digital devices when the supply voltage falls below a specified threshold. Here’s a detailed description of its features and specifications:

Key Features:

1. Voltage Monitoring: The LM809 monitors supply voltages and ensures that the voltage levels remain within a specified range. It is particularly useful in battery-operated devices and systems that require reliable power management.

2. Reset Threshold: The LM809M3X-2.93/NOPB has a fixed reset threshold voltage of 2.93V. This means that when the supply voltage drops below this level, the output will transition to a low state, signaling that the system should reset.

3. Active Low Output: The reset output is active low, which means that it will pull low when a reset condition is detected. This is a common configuration for many digital systems, allowing for easy integration with microcontrollers.

4. Reset Timeout: The device includes a built-in timeout feature that ensures the reset signal remains active for a specified duration after the supply voltage has returned to a safe level. This helps to ensure that the system has stabilized before resuming normal operation.

5. Low Supply Current: The LM809 is designed to operate with low supply current, making it suitable for battery-powered applications where power efficiency is critical.

6. Temperature Range: The device operates over a wide temperature range, typically from -40°C to +125°C, making it suitable for various industrial and automotive applications.

7. Small Package Size: The LM809M3X-2.93/NOPB is available in a compact SOT-23 package, which is ideal for space-constrained designs.

8. No External Components Required: The design of the LM809 allows it to function without the need for external components, simplifying the design process and reducing the overall footprint of the circuit.

Applications:

• Microcontroller reset circuits
• Power supply monitoring
• Battery-operated devices
• Automotive electronics
• Industrial control systems

Electrical Characteristics:

• Supply Voltage Range: Typically operates from 1.0V to 5.5V.
• Reset Threshold Voltage: 2.93V (fixed).
• Output Drive Capability: Capable of driving standard logic levels.
• Reset Delay: Configurable delay time after the voltage returns to normal.

Conclusion:

The LM809M3X-2.93/NOPB from Texas Instruments is a reliable and efficient voltage supervisor that provides essential monitoring and reset functionality for various electronic applications. Its low power consumption, compact size, and robust performance make it an excellent choice for designers looking to enhance the reliability of their systems.