STMicroelectronics

LM393N

LM393N Description

The LM393N is a general-purpose comparator IC designed for a wide range of applications where precise voltage comparison is required. Manufactured by STMicroelectronics, this IC features two independent comparators in a single package, making it highly versatile and efficient for various electronic circuits. The LM393N is housed in an 8-pin DIP package and is designed for through-hole mounting, ensuring robustness and ease of integration into printed circuit boards.

Key technical specifications of the LM393N include:

• Current - Output (Typ): 18mA @ 5V, providing sufficient drive capability for a variety of loads.
• Current - Quiescent (Max): 2.5mA, ensuring low power consumption even during operation.
• Current - Input Bias (Max): 0.25µA @ 5V, minimizing the impact on the input signal source.
• Voltage - Input Offset (Max): 5mV @ 30V, ensuring high accuracy in voltage comparison.
• Voltage - Supply, Single/Dual (±): 2V ~ 36V, ±1V ~ 18V, offering a wide operating voltage range suitable for both single and dual supply configurations.
• Operating Temperature: 0°C to 70°C, making it suitable for use in a variety of environmental conditions.
• Moisture Sensitivity Level (MSL): 1 (Unlimited), indicating excellent resistance to moisture and ensuring long-term reliability.
• Package: Tube, providing a reliable and durable packaging solution.

LM393N Features

The LM393N offers several unique features that set it apart from similar comparator models:

• Dual Comparators: The inclusion of two independent comparators in a single package allows for efficient and cost-effective designs, reducing the need for multiple components.
• Wide Operating Voltage Range: The ability to operate from 2V to 36V in single supply and ±1V to ±18V in dual supply configurations makes the LM393N highly adaptable to various power supply requirements.
• Low Quiescent Current: With a maximum quiescent current of 2.5mA, the LM393N is suitable for low-power applications, reducing overall power consumption and heat generation.
• Low Input Bias Current: The maximum input bias current of 0.25µA @ 5V ensures minimal loading on the input signal source, preserving signal integrity.
• High Input Offset Voltage Accuracy: The maximum input offset voltage of 5mV @ 30V guarantees precise voltage comparison, making the LM393N ideal for applications requiring high accuracy.
• Robust Packaging: The through-hole mounting and tube packaging provide mechanical durability and ease of integration into PCBs, ensuring reliable performance over time.

LM393N Applications

The LM393N is ideal for a variety of applications where precise voltage comparison is necessary. Some specific use cases include:

• Signal Processing: Used in analog signal processing circuits to compare input signals against reference levels, enabling functions such as level detection and threshold triggering.
• Power Management: Employed in power supply circuits to monitor and control voltage levels, ensuring stable and reliable power delivery.
• Automotive Electronics: Utilized in automotive systems for monitoring battery voltage, fuel level, and other critical parameters.
• Industrial Control: Integrated into industrial control systems for monitoring and controlling process variables, ensuring optimal operation and safety.
• Consumer Electronics: Used in consumer devices for functions such as battery monitoring, voltage regulation, and signal conditioning.

Conclusion of LM393N

The LM393N is a versatile and reliable general-purpose comparator IC that offers a wide range of technical specifications and performance benefits. Its dual comparators, wide operating voltage range, low quiescent current, and high input offset voltage accuracy make it an excellent choice for a variety of applications. Despite being marked as obsolete, the LM393N remains a valuable component for designers and engineers seeking a robust and efficient comparator solution. Its compatibility with both single and dual supply configurations, along with its low power consumption and high accuracy, ensures that the LM393N continues to meet the demands of modern electronic designs.