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LSI Computer Systems, Inc. (LSI/CSI)

Find the right IC for your next design

The first fabless Semiconductor Company offering Custom ASICs & Standard ICs in a variety of industries

Custom ASICs Revolutionary LED Drivers Cutting Edge Motor Controllers Differential Line Drivers Programmable Timers PIR Motion Detection Interface Circuits Programmable Digital Locks Frequency Dividers

Full Custom & Standard Integrated Circuits

As a fabless semiconductor company, we are in full control of design, development, and testing

Standard ICs

Our wide selection of standard products are trusted in several high volume and niche industries and come with the same high level of technical support provided for our Full Custom ICs.

Custom ASICs

LSI/CSI offers turnkey development of mixed signal, full custom ICs. An LSI/CSI full custom design results in the highest performance custom chip at the lowest possible price for a high volume application.

New Products

Check out our latest ICs

LS7466

24-BIT 2-Axes Programmable Quadrature Counter with Serial (SPI) Interface (16-Pins)

Incremental Encoder Interface, Counters

LS7466 is a monolithic CMOS 24-bit programmable counter. It consists of two identical functional modules to interface with X and Y axes encoders simultaneously. Each block consists of the following registers: MCR0, MCR1, IDR, ODR, CNTR, DSTR and SSTR. MCR0 and MCR1 controls the functional modes.

LS7866

32-Bit Quadrature Counter w/ I2C Interface (14-Pins)

Incremental Encoder Interface, Counters

LS7866 is a monolithic CMOS 32-bit counter, programmable to operate in 8-bit, 16-bit, 24-bit or 32-bit modular structures. Inputs are provided to interface directly with the quadrature clocks and the index markers from incremental encoders.

LS7641

Reverse Phase (Trailing-Edge) Light Dimmer For LED Lamps (14-Pins)

LED Drivers, Lighting Controls

LS7641 is a monolithic CMOS lamp dimmer IC designed for in line wall switch applications driving both LED and incandescent lamps. It uses Reverse Phase dimming technology wherein the brightness of a lamp is controlled by controlling the turn-off angle in ac half cycles using a FET.

LS9200

Dimmable LED Driver (8 Pins)

LED Drivers

LS9200 is a monolithic CMOS device for driving and dimming LED networks. The regulated constant current is maintained with an external sense resistor forming part of a feedback loop. The maximum LED load current is set by the sense resistor whose duty cycle can be modulated with a built in PWM circuit.

LS7190; LS7191; LS7192

Digital Potentiometers (14 Pins)

3-terminal digital potentiometer with two fixed terminals and a variable wiper terminal with 64 tap positions

The wiper tap position can be varied with any of the following available input signals: up/down clock or A/B quadrature clock or direct data transfer over SPI bus.

LS7193; LS7194

Digital Potentiometers (8 Pins)

3-terminal digital potentiometer with two fixed terminals and a variable wiper terminal with 64 tap positions

The wiper tap position can be varied with one of the following input signals: up/down clock or A/B quadrature clock.

quadrature encoder application featuring an industrial robotic arm in a factory setting
Technology

Understanding Quadrature Counters with the LS7866

Discover the transformative power of the LS7866, a 32-bit quadrature counter from LSI/CSI, designed to elevate precision in systems requiring accurate position, speed, and direction tracking. In our latest blog post, we delve into the mechanics of quadrature counters and illustrate why the LS7866 stands out with its high-resolution capabilities, robust I2C interface, and versatile application across various industries including industrial automation and robotics.

integrated circuit on a circuit board city
Technology

Understanding Digital Potentiometers and the Excellence of the LS7190

Dive into the innovative world of digital potentiometers with our feature on the LS7190. This component exemplifies how digital precision enhances device functionality across various applications. Discover how this robust and versatile digital potentiometer can be integrated into your electronics projects, ensuring reliability and precision at every turn.

Our Brand New LS7190

Featured Product

Digital Potentiometer /Rheostat with Incremental Encoder and SPI Interface

GENERAL DESCRIPTION:
LS7190, LS7191, LS7192, LS7193, LS7194, and LS7195 are versions of a three-terminal digital potentiometer.

X010-10P0L-30
Development Board

Get the solutions you need with the quality you expect.

LS9100X Direct-AC LED Driver IC

The X010-10P0L-30 is a complete and thoroughly integrated evaluation board that features the LS9100X direct-AC LED driver.

The Archimedes Series is designed to be driven directly off the 120VAC line voltage, eliminating the standard power supply and extending the long-term life of the product. The high-power factor can provide enhanced energy savings to the end application.

The smaller form factor provides significant flexibility in creative fixture design and reduces development time. This all-inclusive solution provides impressive performance for distributed light source applications in conjunction with the quality of light.

This board will simplify your evaluation process and development time by providing you with a premium design ready for testing.

Cutting Edge Industrial Solutions

Our broad portfolio of technologies and products will make your next design a success

LED Drivers

Our brand new line of ICs for industrial lighting solutions

LED Drivers

Our brand new line of ICs for industrial lighting solutions
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Timers

Time delay relays for HVAC and Industrial Controls, POR Hold-Off, One-Shot and Repeating Timed Operations

Timers

Time delay relays for HVAC and Industrial Controls, POR Hold-Off, One-Shot and Repeating Timed Operations
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Encoder Interface

Motion control, X/Y Tables, Robotics, Measurement Systems

Encoder Interface

Motion control, X/Y Tables, Robotics, Measurement Systems
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Lighting Controls

Dimmers and Timers for Wall Switch Applications, Step and Continuous Dimmers for touch lamps, Dimming Low-Voltage Halogen Lamps

Lighting Controls

Dimmers and Timers for Wall Switch Applications, Step and Continuous Dimmers for touch lamps, Dimming Low-Voltage Halogen Lamps
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Counters

Industrial, Scientific, and Frequency counting. Quadrature, Non-Quadrature, Normal/Modulo-N, 24 Hour Clock, Non-Recycle, Binary, BCDs

Counters

Industrial, Scientific, and Frequency counting. Quadrature, Non-Quadrature, Normal/Modulo-N, 24 Hour Clock, Non-Recycle, Binary, BCDs
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PIR Detection

Occupancy Sensing for Energy Saving and Security, Remote Camera Operation, Outdoor Security Lighting

PIR Detection

Occupancy Sensing for Energy Saving and Security, Remote Camera Operation, Outdoor Security Lighting
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LS7366R 32-bit CMOS Counter with SPI

The LS7366R is a 32-bit CMOS counter, with direct interface for quadrature clocks from incremental encoders.

LS7560F / LS7561F Brushless DC Motor Controller

The LS7560F/LS7561F are designed to control three or four phase brushless DC motors in closed or open loop configuration.

50+ Years of Excellence

LSI/CSI is the world’s first fabless semiconductor company! The two founders, Alvin Kaplan and Attila Tetik, worked together at General Instrument Microelectronics and in 1969 they were assigned to develop three full custom CPU circuits for CDC in Minneapolis, MN.

ICs that make products better

LSI/CSI

Check out LSI's new

LS7866

32-Bit Quadrature Counter with I2C Interface

LS7866 is a monolithic CMOS 32-bit counter, programmable to operate in 8-bit, 16-bit, 24-bit or 32-bit modular structures.