Exploring the LM339N IC: Circuit Diagram, Pin Configuration, and Applications

The LM339N is a versatile quad differential comparator housed in a 14-pin DIP. It includes four independent voltage comparators that work across a broad voltage range, from a single power supply to dual setups between 2V and 36V. Ensure the power supply voltage (VCC) is at least 1.5V higher than the input voltage for best performance. This IC stands out for its stable current consumption, unaffected by power supply fluctuations, which is vital for applications needing consistent power efficiency. Its outputs are open-collector, making it easy to combine with other outputs for creating "AND" logic connections, useful in complex circuits. The LM339N's adaptability, reliability, and capacity to integrate into various systems make it a major component for developing and improving electronic circuits.

Catalog

LM339N Features

Wide Supply Voltage Range

The LM339N's capacity to operate on a single supply ranging from +2V to +36V, or dual supplies ranging from ±1V to ±18V, renders it adaptable to a multitude of applications. Such versatility helps for varying operational environments and diverse power sources, from low-voltage battery-operated gadgets to robust industrial systems. Consider automotive applications where voltage fluctuations are commonplace; the LM339N's broad supply voltage capability ensures uninterrupted functionality. Does this adaptability simplify the design process by reducing the need for additional voltage regulation components? Absolutely.

Low Supply Current

The significance of maintaining an exceptionally low supply current of merely 1.1 mA should not be underestimated, particularly in energy-efficient designs driven by battery power. This minimal current consumption prolongs battery life, making it an excellent choice for portable and remote sensing devices. Imagine a remote weather station powered by solar panels—the LM339N’s low supply current facilitates extended operational periods and reduces maintenance cycles, thereby boosting system reliability and cost-effectiveness.

Low Input Bias Current

Featuring a typical input bias current of 25 nA, the LM339N minimizes signal processing errors, which is invaluable in high-precision applications. In measurement and instrumentation systems, where exactness is non-negotiable, this attribute shines. For example, in medical diagnostic equipment, the low input bias current ensures the accurate capture of minuscule signal variations, providing dependable data for critical health assessments.

Low Input Offset Current and Voltage

With low input offset current (±5 nA typical) and voltage (±1 mV typical), the LM339N guarantees precise voltage comparisons. This precision is a cornerstone in applications like analog-to-digital conversion and sensor signal conditioning, where minor offsets can lead to significant errors. Consider a high-precision weighing scale: these low offsets are required for maintaining measurement accuracy, ensuring consistent and reliable outcomes.

Wide Common-Mode Input Range

The inclusion of ground in the input common-mode voltage range augments the LM339N’s versatility in signal processing tasks. A wide common-mode range allows for greater flexibility in handling input signal levels, a boon in mixed-signal circuits. In audio signal processing, this characteristic enables the accurate reception of signals with varying amplitudes, thereby improving sound quality. Why is this significant? It allows for better noise rejection and dynamic signal management.

Low Output Saturation Voltage

Exhibiting a low output saturation voltage of 250 mV (typical) while sinking current (ISINK = 4 mA), the LM339N minimizes power loss and heat generation. In power-sensitive applications, this low saturation voltage stands out. Take LED driving circuits, for instance—the low saturation voltage ensures that more power is channelled to the LEDs, enhancing efficiency and brightness by not wasting energy as heat.

Wide Differential Input Range

The differential input voltage being equivalent to the supply voltage accommodates a wide variety of input signals. This makes the LM339N apt for handling signals with substantial dynamic ranges, crucial in communication and signal processing systems. In an RF signal demodulator, a wide differential input range is essential for processing signals over a broad frequency spectrum, ensuring accurate demodulation and signal fidelity. Could a lesser range limit signal processing efficacy? Undoubtedly.

Compatibility

The LM339N’s outputs are compatible with various logic families such as TTL, DTL, ECL, MOS, and CMOS, ensuring smooth integration into different circuit architectures. This compatibility is beneficial for designers aiming to interface the comparator with diverse logic systems. In intricate computing systems, the ease of integration offered by the LM339N reduces design complexity and accelerates development, making it a versatile entity in contemporary electronics.

LM339N Parameters

Parameter	Specification
Number of channels	4
Output type	Open-collector, Open-drain
Propagation delay time (µs)	1.3
Vs (max) (V)	36
Vs (min) (V)	2
Vos (offset voltage at 25°C) (max) (mV)	5
Iq per channel (typ) (mA)	0.2
Input bias current (±) (max) (nA)	250
Rail-to-rail	Out
Rating	Catalog
Operating temperature range (°C)	0 to 70
Features	Standard comparator
VICR (max) (V)	34
VICR (min) (V)	0

 

LM339N Pinout Configuration

LM339N Equivalent

Applications of LM339N

Application	Benefits
Industrial	- Crucial for automation and control systems.
	- Enables level detection and monitoring.
	- Enhances control in manufacturing processes.
	- Facilitates sensor interfaces.
Automotive	- Monitors battery voltage.
	- Provides over-current protection.
	- Controls automotive lighting.
	- Ensures automotive system safety.
	- Aids in audio signal processing.
Infotainment and Clusters	- Facilitates display control.
	- Detects faults in vehicle instrument clusters.
Body Control Modules	- Manages door locks and windows.
	- Controls interior lighting.
	- Enhances vehicle security and comfort.
Power Supervision	- Monitors power supply voltage levels.
	- Provides overload protection.
	- Facilitates load control.
Oscillators	- Generates clock signals and timing functions.
	- Useful in various electronic devices.
Peak Detectors	- Captures highest or lowest voltage levels.
	- Valuable in audio level measurement.
Logic Voltage Translation	- Ensures compatibility between voltage levels.
	- Essential for mixed-signal systems.

The LM339N is favored in the domain of voltage signal comparisons within various electronic circuits, thanks to its incorporation of four individual comparators. This sophisticated design grants it the capability to simultaneously compare four voltage pairs, making it exceptionally beneficial in sensor-based systems and signal conditioning circuits necessitating multiple comparative evaluations.

Sensor-Based Systems

One prominent application of the LM339N resides in sensor-based systems. These systems commonly demand meticulous monitoring and control, which hinges on the comparison of several sensor outputs. For instance, in climate control scenarios, multiple temperature sensors may monitor different zones within a building. How effectively can the LM339N compare these readings? The LM339N excels by accurately juxtaposing these sensor readings against predefined thresholds, thereby enabling proficient system regulation. Furthermore, when integrated into industrial automation processes, the LM339N elevates precision and reliability, fostering optimized system performance.

Signal Conditioning Circuits

Signal conditioning circuits rely heavily on the LM339N for necessary comparisons that refine sensor outputs into more functional signals. This prompts an interesting consideration: What role does comparator integrity play in analog-to-digital conversion? Maintaining the purity of input signals is imperative, and the LM339N bolsters the system's capacity to extract meaningful data from noise, ultimately enhancing overall fidelity. Such comparators helps ensuring that signals adhere to quality benchmarks before further processing, preserving robustness in electronic designs and achieving a higher standard in signal conditioning.

Interface Systems

The practical applications of the LM339N extend to interface systems bridging digital logic with analog signals. In microcontroller-based designs, how does the LM339N facilitate mixed-signal interactions? It orchestrates seamless communication between these environments, ensuring accurate digital interpretations of analog sensors. For example, within robotics, the LM339N compares multiple sensor inputs, such as distance or light intensity, and delivers logical outputs dictating the robot’s maneuvers. This seamless interplay guarantees that only precise and pertinent information reaches the microcontroller, enhancing the system’s dependability.

Power Management Systems

Power management infrastructures receive substantial gain from the LM339N's proficiency in monitoring and comparing battery voltages alongside other vital parameters. How can one prevent overcharging or undercharging using the LM339N? The LM339N can check the battery's charging level by comparing it to a set standard. This helps prevent damage and makes the battery last longer. This accuracy is important for making sure batteries work well in backup power systems and renewable energy setups.

Motor Control Circuits

Motor control circuits further demonstrate the efficacy of the LM339N in proficient operational management. How does it manage motor speed and torque so precisely? By comparing phase voltages and current feedback, the LM339N ensures meticulous control over these parameters. Such control is needed in contexts like electric vehicles or industrial motor drives, where performance and efficiency are supreme. Through exact, real-time comparative analysis, the LM339N aids in sustaining peak motor function, contributing to energy efficiency and system durability.

LM339N Price Info

Part Number	Manufacturer	Definition	Description	Applications
LM339N	Texas Instruments (TI)	Quad Voltage Comparator	14-pin DIP package used for voltage comparisons	Level detection, signal comparisons, signal conditioning, sensor interfaces
LM339NE4	Texas Instruments (TI)	Quad Voltage Comparator (Extended Temperature)	Similar to LM339N but suitable for extreme temperature (-40°C to 125°C)	Same as LM339N, used in extreme environments (e.g., automotive)
LM239NG	Texas Instruments (TI)	Quad Differential Comparator	High-voltage differential comparator for logic gate circuits	High-voltage digital logic gate circuits, analog signal processing
LM239N	Texas Instruments (TI)	Quad Differential Comparator	Similar to LM239NG, used in high-voltage logic gate circuits and signal processing	Applications needing high-voltage logic gate circuits
LM239NE4	Texas Instruments (TI)	Quad Differential Comparator (Extended Temperature)	Similar to LM239N, but for extreme temperature (-40°C to 125°C)	Same as LM239N, used in extreme environments (e.g., automotive)

LM339N CAD Model

LM339N Block Diagram

LM339N Manufacturer

Established in 1930, Texas Instruments (TI) has evolved over the decades and earned recognition as a global leader in the semiconductor industry. But what factors contribute to TI's enduring success and reputation? TI is celebrated for its extensive and diverse portfolio, comprising analog and digital ICs, microcontrollers, processors, and myriad other electronic components. The company's widespread presence in 35 countries further solidifies its influential role in technological advancement.

TI's history shows a strong dedication to advancing the field of electronics. How has TI consistently set benchmarks in the industry? The company's pioneering innovations and products continuously raise the bar. In the arena of developing and manufacturing components like the LM339N, TI harnesses advanced research and robust methodologies. This dedication manifests in tangible ways. Engineers and designers who utilize TI's components often observe improved efficiency, reliability, and scalability in their projects, corroborating TI's meticulous quality control and advanced design principles.

LM339N Package

LM339N and LM339AN Comparison

Parameters	LM339N	LM339AN
Rohs Code	No	No
Part Life Cycle Code	Transferred	Obsolete
Ihs Manufacturer	PHILIPS SEMICONDUCTORS	SAMSUNG SEMICONDUCTOR INC
Package Description	DIP-14	DIP-14
Reach Compliance Code	unknown	unknown
ECCN Code	EAR99	EAR99
HTS Code	8542.39.00.01	8542.39.00.01
Amplifier Type	COMPARATOR	COMPARATOR
Bias Current-Max (IIB) @25C	0.25 µA	0.25 µA
Input Offset Voltage-Max	9000 µV	4000 µV
JESD-30 Code	R-PDIP-T14	R-PDIP-T14
JESD-609 Code	e0	e0
Number of Functions	4
Number of Terminals	14	14
Operating Temperature-Max	70 °C	70 °C
Operating Temperature-Min
Package Body Material	PLASTIC/EPOXY	PLASTIC/EPOXY
Package Code	DIP	DIP
Package Equivalence Code	DIP14,.3	DIP14,.3
Package Shape	RECTANGULAR	RECTANGULAR
Package Style	IN-LINE	IN-LINE
Qualification Status	Not Qualified	Not Qualified
Response Time-Nom	1300 ns	1400 ns
Supply Current-Max	2 mA	2 mA
Supply Voltage-Nom (Vsup)	5 V	5 V
Surface Mount	NO	NO
Technology	BIPOLAR	BIPOLAR
Temperature Grade	COMMERCIAL	COMMERCIAL
Terminal Finish	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)
Terminal Form	THROUGH-HOLE	THROUGH-HOLE
Terminal Pitch	2.54 mm	2.54 mm
Terminal Position	DUAL	DUAL
Base Number Matches	20	19

LM339 and LM339N Comparison

Overview of LM339N

LM339N Application	Benefits
High-Precision Comparators	- Ensures accurate voltage comparisons.
Reduced VOS Drift Overtemperature	- Maintains stability across temperature changes.
Eliminates Need for Dual Supplies	- Simplifies power supply requirements.
Allows Sensing Near GND	- Useful for applications near ground level.
Compatible With All Forms of Logic	- Easily integrates with various logic systems.
Power Drain Suitable for Battery Operation	- Efficient power consumption for battery-driven devices.

Overview of LM339

LM339 Application	Use Cases
Industrial	- Industrial automation and control.
Automotive	- Automotive systems, safety, and control.
Infotainment and Clusters	- Vehicle infotainment and instrument clusters.
Body Control Modules	- Management of vehicle body functions.
Power Supervision	- Voltage monitoring, protection, and load control.
Oscillators	- Generating clock signals and timing functions.
Peak Detectors	- Capturing peak voltage levels, e.g., audio level measurement.
Logic Voltage Translation	- Ensuring compatibility in mixed-signal systems.

On the other hand, the LM339 is identified as a quad differential comparator, frequently utilized in high-voltage digital logic gate circuits. It operates within a common-mode voltage range from 0V to the supply voltage minus 1.5V. The LM339 supports supply voltages from 2V to 36V for single supplies, or ±1V to ±18V for dual supplies, making it highly adaptable for applications requiring broad voltage compatibility and high precision. The common-mode voltage range of the LM339 is necessary because it defines the voltage range over which the comparator can accurately compare inputs. For the LM339, this range ensures reliable operation in high-voltage digital logic applications, where precise differentiation is essential for circuit stability and functionality.

Application-specific Comparison

Choosing between the LM339 and LM339N hinges on the particular demands of the application.

- The LM339N is tailored for consumer electronics, where efficiency and dependability under diverse voltage conditions are highly valued.

- In contrast, the LM339's ability to operate in high-voltage scenarios makes it suitable for intricate digital logic circuits.

Previous design and implementation experiences can influence the decision. Engineers often favor the sturdy LM339N in stable consumer devices, appreciating its balance of efficiency and reliability. Conversely, the LM339’s versatility and extensive voltage range render it highly effective in varied technological applications, often making it the preferred option in more complex system designs.

Understanding the differences and applications of these two products can impact the efficiency and effectiveness of electronic designs. For instance, utilizing the LM339N in consumer appliances while assigning the LM339 to industrial or high-voltage systems can improve performance and reliability. Engineers have observed that leveraging the robust features of the LM339N makes it a favored choice in dependable consumer devices. Meanwhile, the LM339’s adaptability to a wider range of applications establishes it as a major component in diverse technological fields.

Frequently Asked Questions (FAQ)

1. How Does a Comparator Work?

A comparator compares two analog input signals and outputs a digital signal based on their difference. If the voltage at the non-inverting input is lower than the voltage at the inverting input, the output will be low (logical 0). This function is essential in circuits that need to detect when a signal crosses a specific threshold, enabling decisions based on those comparisons.

2. What is a Quad Differential Comparator?

A quad differential comparator, such as the LM339, includes four individual voltage comparators within a single package. Each comparator accepts two input signals and produces an output based on their relative values. This design is particularly useful in scenarios requiring multiple comparisons simultaneously. For instance, in a system with several signal inputs, the LM339 can evaluate each one independently, streamlining the comparison process.

3. What Are the Equivalents of the LM339?

Alternatives to the LM339 include the LM339B, LM2901B, and LM239. These devices share a similar design, each containing four independent comparators. They all operate on a single power supply and support a wide voltage range, offering versatility in different circuits. Substituting the LM339 with the LM339B or LM2901B provides a straightforward way to upgrade or replace components while preserving the original functionality.

4. What Does the LM339N Do?

The LM339N’s primary purpose is to compare input voltages and generate a digital output based on the comparison. It is widely used in circuits where level detection is needed, such as determining if a signal exceeds a preset threshold. The LM339N is also effective in low-level signal sensing, able to detect small voltage changes. In memory circuits, it ensures accurate data reading and writing, providing reliable performance in data-sensitive applications.