LM339J

Product Overview

Category: Integrated Circuit (IC)

Use: LM339J is a quad voltage comparator that is widely used in various electronic circuits for comparing voltages and determining the logic state of signals.

Characteristics: - Low power consumption - Wide supply voltage range - High input impedance - Open collector outputs - Fast response time

Package: LM339J is available in a 14-pin DIP (Dual In-line Package) format.

Essence: The essence of LM339J lies in its ability to compare multiple input voltages and provide corresponding output signals based on the comparison results.

Packaging/Quantity: LM339J is typically sold in reels or tubes, with each reel/tube containing a specific quantity of ICs.

Specifications

• Supply Voltage Range: 2V to 36V
• Input Offset Voltage: ±1mV
• Input Bias Current: ±25nA
• Response Time: 1.3μs
• Output Sink Current: 16mA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

LM339J has a total of 14 pins arranged as follows:

```

---

| | --|1 7 14|-- VCC+ --|2 6 13|-- IN4 --|3 5 12|-- IN3 --|4 11|-- OUT4 --| | --| | --| | --| | --| | --| | --| | --| | --| | --| | --|__________| ```

Functional Features

• Quad voltage comparator: LM339J can compare up to four different input voltages simultaneously.
• Open collector outputs: The outputs of LM339J are open collector, allowing easy interfacing with other digital circuits.
• Wide supply voltage range: LM339J can operate within a wide range of supply voltages, making it suitable for various applications.
• Low power consumption: LM339J consumes minimal power, making it energy-efficient.

Advantages and Disadvantages

Advantages: - Versatile voltage comparator - High input impedance - Fast response time - Wide supply voltage range

Disadvantages: - Limited output current capacity - Requires external pull-up resistors for proper operation

Working Principles

LM339J works based on the principle of comparing input voltages. It compares the voltages applied to its inputs and produces corresponding logic-level outputs based on the comparison results. The outputs are driven to a low state when the voltage at the non-inverting input is higher than the voltage at the inverting input.

Detailed Application Field Plans

LM339J finds extensive use in various electronic applications, including: 1. Voltage level detection 2. Signal conditioning 3. Threshold detection 4. Window comparators 5. Oscillators 6. Analog-to-digital converters (ADCs) 7. Battery chargers 8. Motor control systems

Alternative Models

Some alternative models to LM339J include: - LM393 - LM311 - LM324 - LM2901

These models offer similar functionality and can be used as substitutes depending on specific application requirements.

In conclusion, LM339J is a versatile quad voltage comparator widely used in electronic circuits for voltage comparison and logic state determination. Its low power consumption, wide supply voltage range, and fast response time make it suitable for various applications in different fields.