LM139J/PB

Product Overview

Category: Integrated Circuits (ICs)

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

Characteristics: - Quad voltage comparator - Wide supply voltage range: 2V to 36V - Low input bias current: 25nA - Low input offset current: 5nA - Low output saturation voltage: 250mV at 4mA - High input impedance: 10^12Ω - Fast response time: 1.3μs

Package: LM139J/PB is available in a plastic dual in-line package (PDIP) with 14 pins.

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

Packaging/Quantity: LM139J/PB is typically sold in reels or tubes containing 50 units per package.

Specifications

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

Pin Configuration

LM139J/PB features a 14-pin dual in-line package (DIP). The pin configuration is as follows:

```

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

Functional Features

1. Quad Comparator: LM139J/PB consists of four independent voltage comparators, allowing simultaneous comparison of multiple input voltages.
2. Wide Supply Voltage Range: The IC can operate within a wide supply voltage range of 2V to 36V, making it suitable for various applications.
3. Low Input Bias and Offset Current: LM139J/PB exhibits low input bias current (25nA) and offset current (5nA), ensuring accurate voltage comparisons.
4. Fast Response Time: With a response time of 1.3μs, the IC quickly provides digital outputs based on voltage comparisons.
5. High Input Impedance: LM139J/PB offers high input impedance (10^12Ω), minimizing loading effects on the input signals.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows versatile usage. - Low input bias and offset currents ensure accurate voltage comparisons. - Fast response time enables real-time decision-making. - High input impedance minimizes signal distortion.

Disadvantages: - Limited output current capacity (±20mA). - Requires external components for specific applications.

Working Principles

LM139J/PB 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 IC utilizes internal circuitry to amplify and compare the input voltages, providing reliable and accurate digital outputs.

Application Field Plans

LM139J/PB finds extensive application in various fields, including: 1. Industrial automation systems 2. Automotive electronics 3. Power management circuits 4. Battery monitoring systems 5. Sensor interfaces 6. Signal conditioning circuits

Alternative Models

1. LM339: Quad voltage comparator with similar specifications and pin configuration.
2. LM2901: Quad voltage comparator with lower power consumption.
3. LM311: Single voltage comparator with higher output current capacity.

These alternative models can be considered based on specific application requirements and design constraints.

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