LM239N

Product Overview

Category: Integrated Circuit (IC)

Use: LM239N is a quad differential comparator designed for use in industrial, automotive, and consumer applications. It is commonly used to compare voltages and determine the difference between two input signals.

Characteristics: - Low input offset voltage - Wide supply voltage range - High input impedance - Fast response time

Package: LM239N is available in a 14-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package.

Essence: The essence of LM239N lies in its ability to accurately compare voltage levels and provide a digital output based on the comparison result.

Packaging/Quantity: LM239N is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

LM239N has the following specifications:

• Supply Voltage Range: 2V to 36V
• Input Offset Voltage: 2mV (maximum)
• Input Bias Current: 25nA (maximum)
• Response Time: 1.3μs (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The pin configuration of LM239N is as follows:

```

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| | --|IN(-) VCC|-- --|IN(+) OUT|-- --|GND INB|-- --|OUT INA|-- |___________| ```

Functional Features

1. Differential Comparison: LM239N can compare two input voltages and provide a digital output indicating the relationship between them.
2. Open Collector Output: The output of LM239N is an open collector, allowing easy interfacing with other digital circuits.
3. Wide Supply Voltage Range: LM239N can operate within a wide range of supply voltages, making it suitable for various applications.
4. Low Power Consumption: LM239N consumes minimal power, making it energy-efficient.

Advantages and Disadvantages

Advantages: - Accurate voltage comparison - Wide supply voltage range - Low power consumption - Fast response time

Disadvantages: - Limited number of comparators (quad) - Requires external pull-up resistor for proper output operation

Working Principles

LM239N works based on the principle of comparing two input voltages. It internally amplifies the voltage difference between the inputs and provides a digital output based on the comparison result. The output is an open collector, which requires an external pull-up resistor to obtain the desired logic levels.

Application Field Plans

LM239N finds applications in various fields, including:

1. Industrial Control Systems: LM239N can be used in control systems to monitor and compare sensor voltages, ensuring accurate measurements and triggering appropriate actions.
2. Automotive Electronics: In automotive applications, LM239N can be utilized for voltage monitoring, fault detection, and safety-related functions.
3. Consumer Electronics: LM239N can be employed in consumer electronics devices for tasks such as battery level monitoring, audio signal processing, and voltage level detection.

Alternative Models

Some alternative models to LM239N include:

1. LM339N: Similar to LM239N but with four open-collector comparators in a single package.
2. LM311N: A voltage comparator with differential inputs and a push-pull output configuration.
3. LM324N: A quad operational amplifier with similar functionality to LM239N but with additional amplification capabilities.

These alternative models provide similar functionalities and can be considered as substitutes for LM239N depending on specific requirements.

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