LM339NSR

Product Overview

• Category: Integrated Circuit
• Use: Voltage Comparator
• Characteristics: Low power consumption, wide supply voltage range, high input impedance, open collector output, small package size
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The LM339NSR is a quad voltage comparator designed for use in a variety of applications that require precision analog signal comparisons.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 2V to 36V
• Input Offset Voltage: ±1mV
• Input Bias Current: ±25nA
• Response Time: 1.3μs
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM339NSR has a total of 14 pins arranged as follows:

___________ VCC --| |-- GND IN(-) --| |-- OUT IN(+) --| |-- IN(-) .| |. .| |. .| |. IN(+) --| |-- IN(+) IN(-) --| |-- OUT VCC --|___________|-- GND

Functional Features

• Quad independent voltage comparators
• Wide supply voltage range allows operation from battery-powered systems to industrial applications
• High input impedance enables direct connection to various signal sources
• Open collector outputs facilitate easy interfacing with other digital circuits
• Low power consumption makes it suitable for low-power applications
• Small package size saves board space and simplifies design

Advantages

• Versatile and widely used in various electronic circuits
• High accuracy and precision in comparing analog signals
• Can operate in a wide range of supply voltages
• Low power consumption extends battery life in portable devices
• Open collector outputs provide flexibility in circuit design

Disadvantages

• Limited output current capability
• Requires external pull-up resistors for proper operation
• Not suitable for high-frequency applications due to slower response time

Working Principles

The LM339NSR operates by comparing two input voltages and providing a digital output based on the comparison result. It utilizes an internal voltage reference and a differential amplifier to compare the input signals. The output is driven to a low state when the non-inverting input voltage exceeds the inverting input voltage, and it remains high otherwise.

Detailed Application Field Plans

The LM339NSR finds extensive use in various applications, including:

1. Battery chargers: Monitoring battery voltage levels and controlling charging process.
2. Motor control: Detecting position and speed of motors for precise control.
3. Overvoltage/undervoltage protection: Protecting sensitive electronic components from excessive voltage fluctuations.
4. Signal conditioning: Amplifying and filtering analog signals for further processing.
5. Level detection: Determining liquid or gas levels in industrial systems.

Alternative Models

Here are some alternative models that can be used as substitutes for the LM339NSR:

1. LM393N: Dual voltage comparator with similar characteristics and pin configuration.
2. LM311N: Single voltage comparator with higher speed and wider temperature range.
3. LM324N: Quad operational amplifier with built-in voltage comparators.

These alternatives offer different features and specifications, allowing designers to choose the most suitable option for their specific application requirements.

In conclusion, the LM339NSR is a versatile quad voltage comparator widely used in various electronic circuits. Its low power consumption, wide supply voltage range, and small package size make it suitable for a range of applications. However, it has limitations in terms of output current capability and response time. Designers can consider alternative models based on their specific needs.