What is LM339N Chip?

 The LM339N is a quad comparator IC from Texas Instruments, designed to compare two input voltages and output a digital signal indicating which input is higher. This versatile device features four independent comparators in a single package, making it suitable for a variety of applications in both analog and digital circuits.  

Key Features:

  1. Quad Comparator: The LM339N includes four separate comparators, allowing for multiple comparisons in a single chip, which is ideal for space-saving designs in complex circuits.

  2. Open-Collector Output: The output of each comparator is an open-collector configuration, allowing for wired-AND logic and enabling the device to interface easily with different voltage levels. This feature is useful for interfacing with other digital circuits and for creating multi-point signal connections.

  3. Wide Supply Voltage Range: The IC can operate with a supply voltage from 2V to 36V, providing flexibility in various applications and making it suitable for both low-voltage and high-voltage systems.

  4. Fast Response Time: The LM339N has a propagation delay of about 1.3 µs, allowing it to respond quickly to changes in input signals. This speed is beneficial in applications requiring rapid signal processing.

  5. Low Input Current: The device features low input bias current, typically around 50 nA, which minimizes the loading effect on the input signals, ensuring accurate comparisons.

Applications:

  • Voltage Level Detection: Commonly used to monitor voltage levels in circuits, triggering alerts or actions when specified thresholds are crossed.
  • Oscillator Circuits: Used in relaxation oscillators or pulse-width modulation (PWM) circuits for generating square waves.
  • Window Comparators: Configured to compare multiple voltage levels, useful for creating window detectors in systems that require specific voltage ranges.
  • Signal Conditioning: Employed in applications where signal processing is required, such as in analog-to-digital converters (ADCs) or as part of feedback loops in control systems.

Technical Specifications:

  • Input Voltage Range: Up to 36V
  • Output Voltage: Up to the supply voltage
  • Propagation Delay: Approximately 1.3 µs
  • Operating Temperature Range: -40°C to +125°C
  • Package: Available in various packages, including DIP and SOIC.

The LM339N is a widely used comparator due to its versatility, reliability, and ease of integration into various electronic systems. Its quad configuration and open-collector outputs make it a preferred choice for applications requiring multiple comparisons and logic-level interfacing. 

Search List Page：

https://www.mobikechip.com/static-search/LM339N.html  

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