LM393N

Product Overview

Category: Integrated Circuit (IC)

Use: LM393N is a dual differential comparator integrated circuit. It is commonly used in electronic circuits for comparing voltages and determining the difference between two input signals.

Characteristics: - Dual differential comparator - Low power consumption - Wide supply voltage range - High input impedance - Open collector output - Fast response time

Package: LM393N is available in an 8-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package.

Essence: The essence of LM393N lies in its ability to compare two input voltages and provide a digital output based on the comparison result.

Packaging/Quantity: LM393N is typically sold in reels or tubes containing multiple units, with each reel/tube containing a specific quantity of ICs.

Specifications

LM393N has the following specifications:

• Supply Voltage Range: 2V to 36V
• Input Voltage Range: -0.3V to Vcc + 0.3V
• Output Current: 6mA
• Response Time: 1.3μs
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The pin configuration of LM393N is as follows:

____ IN- |1 8| Vcc IN+ |2 7| OUT GND |3 6| OUT IN+ |4 5| IN- ----

Functional Features

• Dual Comparator: LM393N consists of two independent comparators, allowing simultaneous comparison of two different input signals.
• Open Collector Output: The outputs of the comparators are open collector, which means they can be connected to external devices for various applications.
• Wide Supply Voltage Range: LM393N can operate within a wide range of supply voltages, making it suitable for different electronic systems.
• Fast Response Time: The comparator has a fast response time of 1.3μs, enabling quick comparison and decision-making in circuits.

Advantages and Disadvantages

Advantages: - Low power consumption - High input impedance - Wide supply voltage range - Fast response time

Disadvantages: - Lack of built-in hysteresis - Limited output current capacity

Working Principles

LM393N works based on the principle of comparing two input voltages. It compares the voltage at the IN+ pin with the voltage at the IN- pin and provides a digital output based on the result of this comparison. If the voltage at IN+ is higher than the voltage at IN-, the output goes low (0V), and if the voltage at IN+ is lower, the output goes high (Vcc).

Detailed Application Field Plans

LM393N finds applications in various fields, including:

1. Voltage Monitoring: It can be used to monitor battery voltage levels and trigger alarms or actions when the voltage falls below a certain threshold.
2. Level Sensing: LM393N can be employed to detect liquid levels in tanks or containers by comparing the voltage from a sensor with a reference voltage.
3. Speed Control: It can be utilized in motor control circuits to compare the speed of a rotating object with a set reference speed and adjust accordingly.
4. Light Sensing: LM393N can be used in light-sensitive circuits to compare the intensity of light falling on two sensors and trigger actions based on the comparison result.

Detailed and Complete Alternative Models

Some alternative models to LM393N include:

1. LM339: Quad differential comparator
2. LM311: Single differential comparator with open collector output
3. LM324: Quad operational amplifier with built-in comparators

These alternative models offer similar functionality to LM393N but may have different specifications and pin configurations.

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