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Product ReleaseLSI/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 • 24-bit output register for snapshots of instantaneous counter data. • Four control registers for functional mode configuration. • Programmable event flag outputs • Programmable multi-function inputs Configurable modes and functions include: -- Quadrature or non-quadrature input clock -- Quadrature clock resolution selection of 1x, 2x or 4x -- Binary or BCD or 24-hour count modes -- Modulo-n or non-recycle or free-run count modes The maximum count frequency is 25MHz in non-quadrature mode. Operating voltage is 3V to 5.5V. The LS7166 is available in Standard and fully RoHS compliant 20-pin DIP, 20-pin SOIC and 24-pin TSSOP packages. Pricing at 1,000 pieces is $4.55. The complete Data Sheet for this device, as well as all of our Standard Products, can be found by visiting our Web Site, www.lsicsi.com. For more information, including price quotes and technical assistance, please contact sales@lsicsi.com. In addition to its line of standard product ICs, LSI/CSI has been producing turnkey, mixed-signal full custom ICs for a broad range of industries since 1969. |
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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.
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.
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
