LM139J

Product Overview

Category: Integrated Circuit (IC)

Use: LM139J is a quad voltage comparator designed for use in industrial, automotive, and commercial applications. It is commonly used to compare voltages and provide digital outputs based on the comparison results.

Characteristics: - High-speed response - Low input offset voltage - Wide supply voltage range - Low power consumption - Open-collector outputs - Temperature range: -40°C to +85°C

Package: LM139J is available in a 14-pin ceramic DIP (Dual Inline Package) with gold-plated leads for enhanced durability and conductivity.

Essence: The essence of LM139J lies in its ability to accurately compare voltages and generate digital outputs, making it an essential component in various electronic systems.

Packaging/Quantity: LM139J is typically sold in reels or tubes containing 25 pieces per package.

Specifications

• Supply Voltage Range: 2V to 36V
• Input Offset Voltage: 2mV (maximum)
• Input Bias Current: 25nA (maximum)
• Response Time: 1.3μs (typical)
• Output Current: 20mA (maximum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

LM139J features a 14-pin configuration as follows:

```

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| | --|IN1 | --|IN2 | --|IN3 | --|IN4 | --|GND | --|OUT1 | --|OUT2 | --|OUT3 | --|OUT4 | --|VCC+ | --|NC | --|NC | --|VCC- | |___________| ```

Functional Features

• Quad voltage comparator: LM139J consists of four independent voltage comparators, allowing simultaneous comparison of multiple input voltages.
• Open-collector outputs: The open-collector outputs provide flexibility in connecting external components and allow for wired-OR configurations.
• Wide supply voltage range: LM139J can operate within a wide range of supply voltages, making it suitable for various applications.
• High-speed response: With a response time of 1.3μs, LM139J ensures quick and accurate voltage comparisons.

Advantages and Disadvantages

Advantages: - Accurate voltage comparison - Low power consumption - Wide supply voltage range - High-speed response

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

Working Principles

LM139J operates based on the principle of voltage comparison. It compares the voltages applied to its input pins and generates digital outputs based on the comparison results. The open-collector outputs allow for easy integration with other components in the system.

Detailed Application Field Plans

LM139J finds extensive use in various applications, including but not limited to: - Voltage monitoring and detection systems - Overvoltage/undervoltage protection circuits - Signal conditioning circuits - Motor control systems - Battery management systems

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to LM139J are: - LM339 - LM2901 - LM311 - LM393

These alternatives can be considered based on specific application requirements and availability.

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