LM339D: A High-Performance Quad Differential Comparator

The LM339D is a high-performance quad differential comparator from Texas Instruments (TI). This device consists of four independent voltage comparators designed specifically to operate from a single power supply over a wide voltage range. It offers a range of features that make it suitable for various applications requiring precise and fast comparison of voltages.

Key Features and Specifications:

Quad Differential Comparators:

• The LM339D contains four independent voltage comparators, allowing for simultaneous comparison of multiple voltage signals.

Wide Operating Supply Range:

• The comparator can operate from a single power supply with a voltage range of 2V to 30V (some sources specify up to 36V). This wide operating range makes it versatile for use in different power environments.

Low Supply Current Drain:

• With a typical supply current drain of 0.8mA, the LM339D is efficient in terms of power consumption, making it suitable for low-power applications.

Open Collector Outputs:

• The comparator features open collector outputs, which allows for wired AND connections and compatibility with TTL, DTL, and CMOS logic systems.

Low Input Bias Current:

• The LM339D has a low input bias current of 25nA (typical), which contributes to its high accuracy and stability in comparison tasks.

Fast Response Time:

• The comparator has a fast response time, with a typical value of 300 nanoseconds. This makes it suitable for applications requiring rapid detection of voltage changes.

Compatibility with TTL, CMOS, and DTL Logic:

• The output of the LM339D is compatible with TTL, CMOS, and DTL logic systems, facilitating easy integration with digital circuits.

High Temperature Range:

• The device can operate over a temperature range of 0°C to 70°C, ensuring reliable performance in various environmental conditions.

14-Pin SOIC Package:

• The LM339D is available in a 14-pin small outline integrated circuit (SOIC) package, which is compact and easy to integrate into electronic systems.

Applications:

The LM339D is suitable for a wide range of applications, including:

• Industrial control systems where precise voltage comparisons are required.
• Automation systems that need fast and reliable detection of voltage changes.
• Medical equipment where low power consumption and high accuracy are essential.
• Communications devices that require compatibility with TTL, CMOS, and DTL logic systems.
• Any application where a quad differential comparator with a wide operating voltage range and low power consumption is needed.

In summary, the LM339D is a versatile and high-performance quad differential comparator that offers a range of features making it suitable for various applications. Its wide operating voltage range, low power consumption, fast response time, and compatibility with different logic systems make it an ideal choice for many electronic design projects.