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LM339N Comparator: Pinout, Specifications, and Datasheet

The article discusses the LM339N comparator, focusing on its operation, applications, and benefits in electronic circuits. It explains how the LM339N determines the higher of two voltages and outputs a binary signal, making it a valuable component for decision-making processes in electronics. The article also highlights the versatility of the LM339N in both single and dual supply operations, its efficient power consumption, and its practical uses in various technological and industrial settings.

Catalog

Overview of LM339N

The LM339N is a versatile quad voltage comparator, ideal for both single and dual supply operations, adapting effortlessly across a broad voltage differential from 2V to 36V. This is ensured by maintaining the VCC at a level 1.5V above the input common-mode voltage. Its ability to manage power consumption efficiently across diverse supply voltages enhances its appeal. Moreover, the open-collector outputs enable wired-AND connections, expanding its range of potential applications significantly.

Design specificity makes the LM339N uniquely adaptable for single and dual supply applications, providing flexibility in a variety of settings. In regulatory systems where stability and precision are deeply valued, such as industrial automation or telecommunications, voltage comparators like the LM339N serve an important function. These domains benefit from the component's ability to handle substantial voltage shifts without losing stability. In scenarios prioritizing systems stability, the LM339N’s steady power consumption assures unwavering performance amidst voltage fluctuations.

LM339N Pin Configuration

Pin No.	Pin Name	Description
1	1OUT	Output pin of the comparator 1
2	2OUT	Output pin of the comparator 2
3	Vcc	Supply pin
4	2IN-	Negative input pin of the comparator 2
5	2IN+	Positive input pin of the comparator 2
6	1IN-	Negative input pin of the comparator 1
7	1IN+	Positive input pin of the comparator 1
8	3IN-	Negative input pin of the comparator 3
9	3IN+	Positive input pin of the comparator 3
10	4IN-	Negative input pin of the comparator 4
11	4IN+	Positive input pin of the comparator 4
12	GND	Ground
13	4OUT	Output pin of the comparator 4
14	3OUT	Output pin of the comparator 3

LM339N Symbol, Footprint, and CAD Model

LM339N Symbol

LM339N Footprint

LM339N CAD Model

Features of the LM339N

• Wide Power Supply Range: Supports 2V–36V (single supply) and 1V–18V (dual supply), making it adaptable to diverse circuit designs.

• High Precision: Features a low typical offset voltage of 2mV, ideal for high-accuracy applications like sensitive measurement systems.

• Low Power Consumption: Operates with a supply current of just 1.1mA, suitable for battery-operated and energy-efficient devices.

• Minimal Bias Current Errors: Input bias current of 25nA and offset current of ±5nA reduce error in precision circuits.

• High Input Voltage Handling: Manages common-mode and differential input voltages up to the supply voltage, ensuring stability against input fluctuations.

• Logic Circuit Compatibility: Works with TTL, DTL, ECL, MOS, and CMOS, simplifying integration across digital systems and reducing the need for extra components.

LM339N Technical Specifications

Type	Parameter
Static Current per Channel Max. (mA)	0.5
Output Current Min. (mA)	6
Response Time (Low to High) (µs)	0.3
Minimum Operating Voltage (V)	2
Maximum Operating Voltage (V)	30
Common-Mode Input Voltage Range (VICR) Min. (V)	-
Common-Mode Input Voltage Range (VICR) Max. (V)	3.5
Full-Scale	No
Number of Channels	4
Package/Temperature (°C)	PDIP-14 / 0 ~ 70

LM339N Functional Block Diagram

Alternatives for the LM339N

• LM239N

• LM2901N

• LM339M/NOPB

Applications of the LM339N

Industrial Control Systems

The LM339N is a cornerstone in industrial automation and control systems. Its primary role is to compare voltage levels with precision and trigger actions based on predefined thresholds. For instance, in manufacturing processes, the LM339N can monitor sensor outputs and determine whether certain conditions, such as temperature, pressure, or fluid levels, are within safe operational limits. When a discrepancy is detected, the IC initiates corrective actions like activating alarms, stopping machinery, or adjusting control parameters. Its high input impedance and ability to operate at low voltages make it highly adaptable to various industrial environments, from large-scale factories to compact control panels. By ensuring stable operation even in harsh conditions such as extreme temperatures or electrical noise, the LM339N supports efficiency, safety, and reliability in operations.

Automotive Electronics

In automotive applications, the LM339N serves as a key component for monitoring and controlling multiple systems that are good for both performance and safety. For example, in engine management systems, it helps monitor sensor data, such as oxygen levels, engine temperature, and throttle position, ensuring the engine operates efficiently and within safe limits. It is also great for lighting systems, controlling headlights, interior lighting, and indicator signals. The LM339N plays a role in safety mechanisms such as airbag deployment systems and anti-lock braking systems (ABS), where precise voltage comparisons to detecting potential issues or activating life-saving responses Its robust design and reliability make it a trusted choice for automotive designing systems that must endure the rigors of constant motion, vibrations, and fluctuating temperatures.

Vehicle Infotainment and Instrument Clusters

Modern vehicles rely on infotainment systems and digital dashboards to deliver a seamless and user-friendly driving experience. The LM339N is instrumental in these systems, improving the accuracy and responsiveness of data processing within infotainment units and instrument clusters. In multimedia systems, it helps manage inputs from various sources, such as touchscreens, voice commands, and audio/video signals, ensuring smooth transitions and reliable operation. In dashboard clusters, it contributes to the precise visualization of information like speed, fuel levels, engine status, and navigation data. By enabling voltage comparisons and logical operations, the LM339N ensures that these systems function without lags or errors, enhancing both driver convenience and vehicle performance.

Body Control Modules (BCMs)

Body control modules are central to managing various electrical and electronic functions within a vehicle, such as power windows, central locking, seat adjustments, and interior/exterior lighting. The LM339N is deeply integrated into these modules, acting as a comparator that evaluates input signals from switches, sensors, or controllers. For example, when a driver presses the button to roll down a window, the LM339N compares the input signal with preset conditions and determines the appropriate response such as activating the motor to lower the window. Its ability to operate efficiently at low power and handle multiple inputs simultaneously makes it ideal for these applications. Moreover, its role in ensuring secure and efficient power distribution across the BCM contributes to reducing the likelihood of system malfunctions, thereby improving overall vehicle reliability.

Power Supply Monitoring

Power supplies are the backbone of any electronic system, and their stability is important to ensuring the proper functioning of components. The LM339N excels in monitoring power supply lines, comparing input voltage levels to predefined safe ranges. If the voltage drops below or rises above these limits, the IC can trigger a response, such as shutting down sensitive components to prevent damage, signaling an alert, or activating backup systems. This capability is important in applications like uninterruptible power supplies (UPS), battery chargers, and renewable energy systems, where voltage regulation for maintaining stability and protecting equipment. Its low power consumption and wide voltage range make the LM339N a cost-effective and efficient solution for power supervision tasks.

Oscillator Circuits

Oscillators are used to generate periodic signals that serve as timing references in electronic devices. The LM339N is commonly employed in designing precise oscillator circuits due to its ability to compare voltage levels with exceptional accuracy. For instance, it can be configured to produce square wave signals for use in digital clocks, signal generators, or frequency modulation systems. Its versatility also allows it to function in timer circuits, where precise intervals are needed to control processes like delay relays, pulse-width modulation (PWM), or sequential operations in digital systems. The LM339N's high-speed operation and low offset voltage contribute to the stability and accuracy of these oscillators.

Peak Detection in Signal Processing

Detecting the peak value of a signal is a function in many measurement and signal processing applications. The LM339N can efficiently identify the maximum amplitude of a fluctuating signal by comparing input levels and holding the peak value for further analysis. This feature is useful in systems such as audio signal processing, where it helps identify the loudest part of an audio waveform for volume normalization or distortion prevention. Similarly, in test and measurement equipment, the IC facilitates accurate readings by isolating peak values from noisy or rapidly changing signals. Its ability to operate effectively in both analog and digital systems enhances its utility in a wide range of peak detection scenarios.

Logic Level Voltage Translation

Many electronic systems consist of components operating at different voltage levels, making voltage translation for ensuring compatibility and consistent performance. The LM339N simplifies this process by comparing logic levels and translating signals between circuit sections with varying voltage requirements. For example, in a mixed-signal system where some components operate at 3.3V and others at 5V, the LM339N ensures that signals are accurately converted without distortion or loss of information. This capability is use in systems like microcontrollers, where peripherals and sensors may operate at different voltage levels. By providing seamless logic level translation, the LM339N enables smooth communication between components and helps maintain overall system stability.

LM339N Electrical Characteristics

LM339N Absolute Maximum Ratings

LM339N Recommended Operating Conditions

Typical Performance Characteristics of LM339N

Package for LM339N

LM339N Manufacturer Information

Texas Instruments (TI) is a leading semiconductor company with over 30,000 employees operating in 35 countries. Since inventing the first functional integrated circuit in 1958, TI has focused on designing and manufacturing analog and embedded processing chips for industries like automotive, telecommunications, and electronics. TI’s global success is driven by its skilled workforce, known as TIers, who collaborate to solve complex challenges and deliver reliable, cutting-edge products. Their work helps industries meet evolving technology demands while shaping innovations that impact daily life. For more than six decades, TI has remained at the forefront of semiconductor advancements. Its focus on innovation and efficiency enables the creation of high-performance products that push the limits of silicon-based technology. Through innovation and collaboration, TI continues to influence industries and improve how people interact with technology worldwide.

Datasheet PDF

LM339N Datasheets:

Material Set 30/Mar/2017.pdf

Mult Dev Datasheet 11/Dec/2018.pdf

2.73KHz.pdf