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LM393D Comparator: Features, Specifications, and Datasheet

The LM393D is a popular, powerful dual-voltage comparator that’s used in all kinds of electronic projects. Everyone love it for its low power usage and reliable accuracy when it comes to detecting voltage changes. In this article, we'll take a closer look at the LM393D, especially the version made by STMicroelectronics. We’ll go over its pin layout, technical features, and how it’s used in different applications, showing why it’s such a valuable tool for creating new and exciting projects.

Catalog

1. What is the LM393D?

2. LM393D Pin Configuration

3. Features of the LM393D

4. LM393D Technical Specifications

5. Block Diagram of the LM393D

6. Alternatives to the LM393D

7. Optimizing LM393D Role in Circuitry

8. Applications of the LM393D

9. LM393D Manufacturer Information

What is the LM393D?

The LM393D is a chip that contains two low-voltage comparators, each able to work on its own. It’s built to run on a single power supply across a wide voltage range, but it can also use split power supplies, making it flexible for different uses. One of its standout features is that it can handle ground as part of its input range, even when using just one power source. This makes the LM393D a great choice for all kinds of electronic projects, from simple designs to more complex systems. Thanks to its broad voltage compatibility, it can work with regular batteries or other low-voltage sources while still performing well. This flexibility is especially helpful during prototyping and for applications where end needs might vary. The ability to include ground in the input range without extra parts makes circuit design simpler. This feature allows for easier layouts with fewer parts, improving both reliability and efficiency. Fewer components mean lower costs and make troubleshooting and maintenance easier, since there are fewer parts that could fail.

LM393D Pin Configuration

LM393D Pinout

Features of the LM393D

• Wide Voltage Range: Operates with a supply voltage from 2V to 36V for single supply, or ±1V to ±18V for dual supply.
• Low Power Consumption: Steady supply current of only 0.45 mA, regardless of supply voltage changes.
• Energy Efficiency: Supports energy conservation for extending battery life in portable devices.
• Low Input Bias/Offset: Features low input bias and offset currents, and minimal input offset voltage, enhancing signal processing accuracy.
• Input Range Includes Ground: Can handle ground within its input range, easing integration into various circuits without extra voltage adjustment components.
• Compatible with Multiple Logic Families: Works with TTL, DTL, ECL, MOS, and CMOS logic families, providing broad application potential.
• Versatile Use: Ideal for applications ranging from simple comparators to complex control systems, facilitating innovative solutions in both amateur and industrial settings.

LM393D Technical Specifications

Type	Parameter
Lifecycle Status	ACTIVE (Last Updated: 7 months ago)
Mount	Surface Mount
Package / Case	8-SOIC (0.154, 3.90mm Width)
Weight	4.535924g
Packaging	Tube
Part Status	Active
Number of Terminations	8
Type	General Purpose
Max Power Dissipation	710mW
Terminal Form	GULL WING
Number of Functions	2
Time@Peak Reflow Temperature-Max (s)	30
Pin Count	8
Power Supplies	5V
Nominal Supply Current	1mA
Factory Lead Time	25 Weeks
Mounting Type	Surface Mount
Number of Pins	8
Operating Temperature	0°C~70°C
JESD-609 Code	e4
Moisture Sensitivity Level (MSL)	1 (Unlimited)
ECCN Code	EAR99
Terminal Finish	Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal Position	DUAL
Peak Reflow Temperature (Cel)	260
Supply Voltage	5V
Base Part Number	LM393
Output Type	CMOS, DTL, ECL, MOS, Open-Collector, TTL
Number of Circuits	2
Power Dissipation	710mW
Output Current	18mA
Propagation Delay	1.3 μs
Turn On Delay Time	1.3 μs
Voltage - Supply, Single/Dual (±)	2V36V ±1V18V
Input Offset Voltage (Vos)	1mV
Average Bias Current-Max (IIB)	0.4μA
Max Input Current	250nA
Input Bias Current	250nA
Voltage - Input Offset (Max)	5mV @ 30V
Ambient Temperature Range High	70°C
Current - Output (Typ)	18mA @ 5V
Length	4.9mm
REACH SVHC	No SVHC
Radiation Hardening	No
Max Supply Current	1mA
Quiescent Current	2.5mA
Response Time	1.3 μs
Output Current per Channel	18mA
Voltage Gain	108.02dB
Supply Voltage Limit-Max	36V
Dual Supply Voltage	9V
Max Junction Temperature (Tj)	150°C
Current - Input Bias (Max)	0.25μA @ 5V
Natural Thermal Resistance	125 °C/W
Height	1.75mm
Width	3.9mm
RoHS Status	ROHS3 Compliant
Lead Free	Lead Free

Block Diagram of the LM393D

LM393D Block Diagram

Alternatives to the LM393D

Part Number	Description	Manufacturer
LM393DG4	Dual differential comparator, commercial-grade 8-SOIC 0 to 70	Texas Instruments
LM393N/NOPE	Low Power Low Offset Voltage Dual Comparator 8-PDIP 0 to 70	Texas Instruments
LM393M/NOPE	IC DUAL COMPARATOR, 9000 UV OFFSET-MAX, 1300 ns RESPONSE TIME, PDSO8, LEAD-FREE, SOIC-8, Comparator	National Semiconductor Corporation
LM393MX/NOPE	Low Power Low Offset Voltage Dual Comparator 8-SOIC 0 to 70	Texas Instruments
LM393YDT	DUAL COMPARATOR, 9000uV OFFSET-MAX, 1300ns RESPONSE TIME, PDSO8, LEAD-FREE, MICRO, PLASTIC, SOP-8	STMicroelectronics
LM393D	Dual differential comparator, commercial-grade 8-SOIC 0 to 70	Texas Instruments
LM393M	Comparator	Bay Linear Inc
LM393MX_NL	Comparator, 2 Func, 9000uV Offset-Max, 1400ns Response Time, BIPolar, PDSO8, SOP-8	Fairchild Semiconductor Corporation
LM393DRG3	Dual differential comparator, commercial-grade 8-SOIC 0 to 70	Texas Instruments
LM393DG	Comparator, Dual, Low Offset Voltage, SOIC-8 Narrow Body, 98-TUBE	ON Semiconductor

Optimizing LM393D Role in Circuitry

The LM393D serves as an important element akin to the LM311 comparator IC, predominantly engaged in tasks involving voltage contrast within digital networks. It incorporates both inverting and non-inverting input terminals, determining the output by evaluating voltages at these junctions. This comparator frequently finds its place in projects needing logic level transformations or elementary analog-to-digital functions, showcasing its wide-ranging application in circuit design. The LM393D operates with a conventional +5V power source. The VCC+ pin links to the +5V supply, while the VCC- pin is connected to ground, establishing a stable 0V reference. This setup is use in achieving reliable performance and averting issues related to power supply fluctuations. By adjusting the voltage applied to both the inverting and non-inverting inputs, others can deftly manage the output behavior of the LM393D. This regulation of voltage inputs facilitates precise operations, like triggering specific actions when threshold parameters are fulfilled. Though the LM393D offers pins for DC offset adjustments, these are commonly left unused to simplify overall input management. It's observed that eschewing manual adjustments can enhance performance and minimize design complexity.

Applications of the LM393D

Signal Conditioning

Application of the LM393D lies in signal conditioning, where it plays a role in filtering noise from analog signals. By judiciously comparing incoming signals to a reference voltage, it can assess signal integrity with finesse.

Pulse Width Modulation

In motor control, the LM393D is employed for pulse width modulation (PWM), benefiting from its high-speed differential input. It adeptly transforms varying input signals into PWM outputs, a capability treasured for facilitating motor speed and efficiency adjustments. Others have found that adhering to recommended operating conditions nurtures stable PWM signals, bolstering reliable motor control to meet technical demands.

Voltage Regulation

In voltage regulation tasks, the LM393D acts as a core component in control circuits monitoring and optimizing voltage levels. By vigilantly detecting fluctuations, it supports maintaining stability in output, a feature cherished for protecting sensitive equipment.

Battery Monitoring

The comparator's proficiency in voltage level analysis extends to battery monitoring systems, which rely on it to provide assessments of battery health and charge status. By continuously matching battery voltage against predefined thresholds, it helps avert overcharging or deep discharging, an aspect for prolonging battery life and promoting safety. This ability holds particular appeal in scenarios where maintaining battery integrity is needed.

Motion Detectors

Incorporated within motion detectors, the LM393D evaluates shifts in input signals, such as those from infrared sensors, effectively processing these signals to initiate alerts or actions. Field observations highlight that incorporating the LM393D enhances responsiveness and accuracy in detection systems, a trait valued for ensuring security and efficiency in dynamic environments.

Overcurrent Protection

The LM393D element in crafting overcurrent protection circuits designed to prevent damage from excessive current flow. By detecting potential overcurrent situations through comparative analysis of sensed currents and set limits, it offers a protection strategy that balances cost-effectiveness with reliability.

LM393D Manufacturer Information

STMicroelectronics distinguishes itself within the semiconductor realm, celebrated for crafting intricate solutions that seamlessly merge cutting-edge manufacturing prowess with an expansive array of intellectual property assets. The company nurtures strategic collaborations that amplify its global presence, propelling ongoing progress. With an emphasis on system-on-chip (SoC) technology, STMicroelectronics fuels remarkable developments across various modern applications, driving forward fields like telecommunications, electronics, and automotive industries. STMicroelectronics' core approach involves turning visionary ideas into concrete realities through meticulous attention to innovation and strategic partnerships. This relentless pursuit of excellence is evident in their wide range of solutions that continually challenge the limits of technological possibilities.

Datasheet PDF

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Frequently Asked Questions [FAQ]

1. What is the role of the LM393 in electrical circuits?

The LM393 serves as a versatile dual voltage comparator with distinct input and output terminals. It adeptly switches output levels based on the input voltage's relationship to a preset reference voltage. The comparators' precise switching capability boosts performance, aligning well with the desire for accuracy and effectiveness.

2. Can the LM393 be substituted with the LM358?

Generally, substituting the LM393 with the LM358 is not advisable. While the LM358, an operational amplifier, can somewhat mimic a comparator’s role, it does so with notable limitations in speed and precision. Conversely, the LM393 lacks the amplification attributes inherent in the LM358, given their core design differences.

3. In what ways does the LM293 stand apart from the LM393?

A key distinction of the LM293 from the LM393 is observable in their temperature operating ranges. The LM293 is capable of functioning across a broader range of -25°C to 85°C, as opposed to the LM393's 0°C to 70°C. This broader range renders the LM293 an excellent choice for environments prone to temperature variations or extremes.

4. What process is followed for voltage comparison using the LM393?

Employing the LM393 for voltage comparison entails establishing a reference voltage and deploying adjustable attenuation circuits to manage varying input levels. This comparator supports both inverting and non-inverting comparisons, which are further utilized to operate an LED via an inverter circuit. This approach is advantageous for developing systems demanding swift reactions and minimal power consumption, underscoring the LM393's utility and adaptability in a broad spectrum of applications.

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