on November 8th 51

LM393N Comparator IC Explained

The LM393N dual-voltage comparator IC is a trusted and versatile component, popular for its adaptability and reliability in diverse circuit applications. Housed typically in a convenient DIP8 package, it is easy to work with, especially in prototyping and breadboard setups. This IC shines in precision voltage comparison tasks, from zero-crossing and peak detection to signal rectification, making it a staple in battery-operated gadgets, automotive systems, and industrial designs. With low power consumption and a wide voltage range, the LM393N excels in extending battery life and enhancing performance stability in sensitive analog applications. In this article, we'll explore the LM393N's technical characteristics, pin configuration, and practical applications to help you leverage its full potential in your projects.

Catalog

Overview of the LM393N

The LM393N is crafted as a flexible dual independent low-voltage comparator, suitable for scenarios that benefit from single-supply operations across a broad voltage range. Its design accommodates split supply usage, offering a versatile solution for varied electrical configurations. Its input common-mode voltage range notably stretches to include the ground level, even within a single-supply environment, illustrating its capability to adapt to demanding power situations.

Within its structural design, the LM393N supports numerous applications. These span from battery-powered devices to more intricate systems where stability is desired under altering power conditions. In actual contexts, you can frequently experience a sense of trust with components like these, relying on them to safeguard reliability in embedded systems amidst unstable power supplies.

The LM393 series includes the LM393DR, LM393M, LM393D, LM331N, and LM393MX variants, each serving distinct functionalities. These models address specific needs, enhancing design efficiency and adaptation to project-specific demands. Selecting the right variant can have a remarkable impact on the integration process and the electronic configuration's overall performance.

Pin Configuration

LM393N CAD Representation

Schematic Symbol

PCB Footprint

Three-Dimensional Representation

Characteristics

Feature	Specification
Supply Voltage Range	+2 V to +36 V (single-supply) or ±1 V to ±18 V (dual supply)
Supply Current	0.45 mA independent of supply voltage (1 mW/comparator at +5 V)
Input Bias Current	20 nA (typical)
Input Offset Current	±3 nA (typical)
Input Offset Voltage	±1 mV (typical)
Input Common-Mode Voltage Range	Includes ground
Output Saturation Voltage	80 mV (typical, Isink = 4 mA)
Differential Input Voltage Range	Equal to the supply voltage
Output Compatibility	TTL, DTL, ECL, MOS, CMOS compatible

Technical Specifications

Type	Parameter
Mounting Type	Through Hole
Package / Case	8-DIP (0.300, 7.62mm)
Surface Mount	NO
Number of Elements	2
Operating Temperature	0°C ~ 70°C
Packaging	Tube
JESD-609 Code	e3
Part Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Number of Terminations	8
ECCN Code	EAR99
Type	General Purpose
Terminal Finish	Matte Tin (Sn) - annealed
Terminal Position	DUAL
Peak Reflow Temperature (Cel)	NOT SPECIFIED
Number of Functions	2
Supply Voltage	5V
Time@Peak Reflow Temperature-Max (s)	NOT SPECIFIED
Base Part Number	LM393
Pin Count	8
JESD-30 Code	R-PDIP-T8
Qualification Status	Not Qualified
Output Type	CMOS, DTL, ECL, MOS, Open-Collector, TTL
Power Supplies	5V
Response Time	1300 ns
Voltage - Supply, Single/Dual (±)	2V ~ 36V ±1V ~ 18V
Average Bias Current-Max (IIB)	0.4μA
Supply Voltage Limit-Max	36V
Current - Quiescent (Max)	2.5mA
Voltage - Input Offset (Max)	5mV @ 30V
Current - Input Bias (Max)	0.25μA @ 5V
Current - Output (Typ)	18mA @ 5V
Height Seated (Max)	5.33mm
RoHS Status	ROHS3 Compliant

Functional Block Diagram

Applications of LM393N Comparator

The LM393N comparator stands out as a complex and efficient component employed across various practical fields, specifically excelling in environments characterized by the demands of battery-powered and industrial systems.

Battery-Powered Devices

The LM393N's approach to energy consumption and accuracy caters beautifully to battery-operated devices. In the world of portable electronics, achieving a delicate harmony between energy efficiency and performance can deeply influence your satisfaction and device appeal. The LM393N excels by providing accurate voltage comparisons with minimal energy drain, thereby extending battery longevity. You can often tap into its capabilities to design circuits that vigilantly monitor battery status, prompting timely recharges and safeguarding against excessive depletion. This key role underpins the device's steadfast reliability over prolonged usage periods.

Industrial Applications

Within the industrial landscape, the LM393N is appreciated for its robustness and consistent performance, used for sustaining operations amidst demanding conditions. Its integration into automated systems assists in signal processing and enhances decision-making functionalities. For example, in temperature control systems, the LM393N adeptly compares temperature readings to set benchmarks, triggering control processes to maintain desired environmental conditions. Its capacity to perform consistently across varying environmental circumstances ensures stability and operational efficiency in automated frameworks. The actual applications emphasize the significance of dependable components like the LM393N in supporting industrial system continuity.

Package

Mechanical Data

Layout Design

Manufacturer

STMicroelectronics stands out in the world of semiconductors by pioneering a diverse range of sophisticated solutions tailored for various microelectronics applications. The company excels in silicon technologies, and its extensive manufacturing skills make it a leader in System-on-Chip innovation, a domain that intertwines with modern technological advancements. Drawing from an extensive repository of intellectual property, STMicroelectronics fosters strategic partnerships, enhancing its footprint in the market.

STMicroelectronics' deep-seated knowledge of silicon technologies serves as the core of its design and manufacturing prowess. This basis supports the development of high-efficiency chips, adeptly meeting the challenging parameters of diverse applications. The expertise in silicon allows for the creation of consumer electronics that offer reliability and energy efficiency, thus encouraging the adoption of contemporary devices that transform day-to-day experiences.

Datasheet PDF

LM393N Datasheets:

LM193,A LM293, A-LM393,A.pdf

LM193,293,393 Datasheet.pdf