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LSI / CSI  Print
 Founded in 1969, LSI Computer Systems, Inc. (LSI/CSI) began operations as the world's first fabless semiconductor company. Since its inception, LSI/CSI has been engaged in the design and production of Full Custom and Standard Integrated Circuits. Using a broad array of process technologies, LSI/CSI has produced ICs that extend from the consumer and industrial marketplace to military and aerospace applications. Our proven expertise and strong reputation have made us the IC provider of choice for leading manufacturers in a broad range of industries. Full Custom Integrated Circuits LSI/CSI has the experience to guarantee successful development and production of any full custom IC program. The in-depth involvement of our staff ensures that our full custom ICs are both initially optimized for their application and supported technically throughout their life cycle. Please contact us to find out what an LSI/CSI full custom IC can do for your product. You will also find out why we've earned the confidence and loyalty of our customers. Products motor controller, incremental encoder, boards, integrated circuit, electronic component, Quadrature Clock Converter Integrated Circuits
 LSI/CSI announces the addition of five new devices to its family of Quadrature Clock Converter ICs. Designated LS7082N1, LS7083N, LS7084N, LS7183N and LS7184N, these devices are designed to interface between incremental encoders and counting devices by converting the encoder quadrature outputs into directional up/down clocks or clock and direction signals for driving the counting devices. When interfaced with microcontrollers, these devices can free up the resources of a microcontroller by relieving its computational burden used for decoding the quadrature signals. This is especially true at high speeds where the microcontroller becomes an unwieldy tool in performing the task effectively.
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32-bit Quadrature Counter with Serial (SPI) Interface Offers Multi-Mode Programmability
 LSI/CSI announces the expansion of their line of Encoder Interface/Quadrature Counter ICs with the addition of the LS7366R, an Integrated Circuit for decoding and counting quadrature clocks directly from Incremental Encoders. According to Pete Visconti, VP Sales and Marketing, "A huge advantage is gained by our customers in that the LS7366R provides for a dedicated solution to position and displacement tracking at 40x106/sec line rate (at 5V) from the encoder and a count limit of 232. Its serial interface (SPI) greatly reduces the required IO wire count as compared to a parallel bus structure." It can also operate with non-quadrature clock signals and provides various counting modes for signal conditioning. The LS7366R operates over the voltage range of 3V to 5.5V.
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Precision, Low Cost, Stepper Motor Controller ICs for Bipolar and Unipolar Motors
 LSI/CSI announces the availability of three new high performance stepper motor controller ICs. Designated LS8297, LS8297CT and LS8397, these ICs can replace the expensive L297 in all applications, while providing additional features not available in L297. According to Pete Visconti, LSI's VP Sales and Marketing, all these devices offer half-step and full-step sequences in both normal drive and wave drive modes similar to the L297. In addition the LS8297CT and the LS8397 offer correction for the torque-ripple, not provided in L297 half-step sequence. A power saving holding-torque mode is also available in LS8397 for maintaining the drivers at a reduced power level when the motor is not turning. Four phase outputs and two inhibit outputs are provided for driving external H-bridge drivers, allowing for the selection of a standard driver, such as the popular L298 or an application specific custom driver. An external reference voltage, in conjunction with the winding current sense voltages, regulate the PWM duty cycles of the driver outputs. One of two decay modes, fast-decay and slow-decay, can be selected to suit the characteristics of the motor winding. ...More >> A Powerful Family of Multi-Mode Counter ICs with Interfaces for Incremental Encoders
 LSI/CSI introduces the LS7766, a robust addition to its family of encoder interface and motion control ICs. The LS7766 supersedes its rivals in versatility and system throughput. Available in either single-axis, or dual-axis versions, it has a count range of 32-bits to support applications where large magnitudes of data are involved. Its configurable Octal/Hex parallel IO bus enhances the system throughput by a factor of two over its predecessors. Its many configurable counting modes relieve the host micro-controller of various control and data formatting tasks reducing the burden on its resources. The LS7766 can directly interface with an incremental encoder. The quadrature signals from the encoder are validated with internal digital filters to eliminate errors from induced noise and encoder dither, providing a high level of reliability. The filtered signals are decoded for clock and direction before applying to the 32-bit counter. Alternatively, the count inputs can be configured to function in the non-quadrature mode if encoder interface is not required. ...More >>Step Dimmer IC with AGC Touch Control by LSI/CSI
New Low Cost Precision Stepper Motor Controller for Bipolar and Unipolar Motors by LSI/CSI
 LSI/CSI announces the availability of its new high performance stepper motor controller integrated circuit, designated LS7290. “A huge advantage for our customers is that the low cost LS7290 can replace the expensive L297 in most applications, while providing more programmable micro-steps” according to Pete Visconti, VP Sales and Marketing. This new IC is capable of a large selection of step sizes ranging between full and 1/32 step. The LS7290 is designed to control two-phase bipolar stepper motors or four-phase unipolar stepper motors with minimum burden on the resources of a host micro-controller. ...More >>A Powerful Multi-Mode Counter Interfaces with Incremental Encoders
 LSI/CSI introduces the LS7766, a robust addition to its family of encoder interface and motion control ICs. The LS7766 supersedes it's rivals in versatility and system throughput. Available in both single-axis or dual-axis versions, it has a count range of 32-bits to support applications where large magnitudes of data are involved. It's configurable Octal/Hex parallel IO bus enhances the system throughput by a factor of two over it's predecessors. Its many configurable counting modes relieves the host micro-controller of various control and data formatting tasks reducing the burden on it's resources. ...More >>Quadrature Counter Packs 4-Axes Support in a Single Chip with Non-Quadrature Multi-Mode Counting Capability
 LSI/CSI introduces LS7566R, the latest addition to its incremental encoder interface family of ICs. It provides an efficient hardware solution for extracting position data directly from the quadrature outputs of as many as four encoder units. The input quadrature clocks from encoders are digitally filtered for elimination of noise and errors arising out of encoder dither, providing high level of reliability. Communications to host processors are facilitated by a 3-state octal bus and an interrupt protocol with selections from a pool of marker flags.
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Motor Controller - Brushless DC Motor Controller with Integrated Circuits
 LSI Computer Systems, Inc., offers two new brushless DC motor controllers, the LS7560N and LS7561N. These new lCs are designed to control three or four phase brushless DC motors and single phase brushless DC motors in open or closed loop configurations. Implemented in CMOS Silicon Gate, these controllers are feature rich and cost effective. Operational features include open or closed loop speed control, electrical sensor separation selection, dynamic or PWM dynamic braking, fault detection and indication, overcurrent sensing, direction controls, enable input, PWM select for both top and bottom drivers or bottom drivers only, and top driver polarity select. ...More >> Incremental Encoder - Dual-Axis Quadrature Counter Interface
 Features Multi-Mode High Speed Counting The LS7266R1 is a programmable quadrature counter IC providing an efficient hardware solution to extracting position data directly from the quadrature outputs of as many as two encoder units. The input quadrature clocks are digitally filtered for elimination of noise and errors arising out of encoder dither, providing a high level of reliability. ...More >> LSI/CSI Offers Quadrature Counter Interface for Incremental Encoders - Features Multi-Mode Counting
 The LS7166 is a programmable quadrature counter IC providing an efficient hardware solution for acquiring position data directly from incremental encoders. Acting as a peripheral device, it can relieve the host processor of the time intensive task of tracking the encoder motion clock by clock, allowing the computational resources to be allocated for processing the collected data. The IC is programmable to function in several counting and input/output modes, configurable by four write accessible mode control registers. A 3-state octal bus facilitates communication with host processors. LS7166 includes the following features: • 24-bit up/down counter for accumulating encoder positional data • 24-bit input register along with its companion 24-bit comparator for target position
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LSI/CSI Offers a Step Dimmer IC with AGC Touch Control
 The LS7541 is a cost-effective Step Dimmer CMOS IC capable of producing one, three or four-step lighting sequences. The LS7541 is a new addition to a family of Lighting Control ICs offered by LSI/CSI, a Melville, NY Company. The LS7541 is the main component for built-in or screw-in touch-adapter lamp modules that convert any metallic part of a lamp to a touch pad for control of lighting intensity. The AGC (Automatic Gain Control) feature of the LS7541 allows the modules to convert any size lamp to touch control, independent of line plug polarity. The touch-adapter modules provide lamp owners with ease of use and energy savings while eliminating the need for costly multi-filament bulbs. Touch-adapter modules compatible with 50Hz/60Hz AC Line frequencies and any AC Line voltage can be produced using the LS7541.
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LSI/CSI's LS7366 32-bit Quadrature Counter with Serial (SPI) Interface Offers Multi-mode Programmability  The LS7366 is an Integrated Circuit for decoding and counting quadrature clocks directly from Incremental Encoders. It provides for a dedicated solution to position and displacement tracking at 40x106/sec line rate (at 5V) from the encoder and a count limit of 232. Its serial interface (SPI) greatly reduces the required IO wire count as compared to a parallel bus structure. It can also operate with non-quadrature clock signals and provides various counting modes for signal conditioning. The LS7366 operates over the voltage range of 3V to 5.5V.
Programming of the LS7366 and all communications between itself and a host controller are made with four simple instructions: READ_reg, WRITE_reg, LOAD_reg and CLEAR_reg. The functional modes are controlled with two bytes of data written into two on-chip Mode Registers.
The configurable modes are:
-Quadrature/non-quadrature count inputs
-Quad cycle resolution selection by factor of x1, x2 or x4
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