HP Introduces Industry's First Bi-Directional, Dual-Channel High-Speed Optoisolators; Isolated Full-duplex Data Transfer at 1MBd Rates.PALO ALTO Palo Alto, city, California Palo Alto (păl`ō ăl`tō), city (1990 pop. 55,900), Santa Clara co., W Calif.; inc. 1894. Although primarily residential, Palo Alto has aerospace, electronics, and advanced research industries. , Calif.--(BUSINESS WIRE)--Nov. 11, 1998-- Hewlett-Packard Company today announced a family of dual-channel bi-directional optoisolators capable of data rates of up to 1MBd, in the compact SOIC-8 surface-mount package. Optical isolation between a computer or other equipment using sensitive, low-voltage electronics and copper wires running through an electrically noisy environment can be crucial to protecting equipment and ensuring reliable operation. Serial communications See serial transmission and serial. standards such as EIA-RS-232 and RS-485 specify signal levels, but indicate that protection for electrically noisy environments is outside their scope. Industrial installations can easily encounter multiple ground paths, causing induced currents In`duced´ cur´rent 1. (Elec.) A current due to variation in the magnetic field surrounding its conductor. and voltages, electrical spikes from heavy-duty motors, and all manner of transients and over-voltages. The optoisolator effectively protects equipment from those damaging voltages. One of these optoisolators provides protection for full-duplex communications channels Also called a "circuit" or "line," it is a pathway over which data are transferred between remote devices. It may refer to the entire physical medium, such as a telephone line, optical fiber, coaxial cable or twisted wire pair, or, it may refer to one of several carrier frequencies , with isolated transmit and receive lines. They may be used for other bi-directional communications applications, such as programmed logic controller input/output interface. Other applications include isolated sensing of a power-supply input and output voltage or current. The HCPL-0560 and HCPL-0561 are designed to address the bi-directional data-communication market segment. Their special bi-directional functionality makes them suitable for use in applications involving industry serial-data-transmission standards such as RS-232 and RS-485. With a typical common-mode rejection of 10kV/microsecond, these optocouplers improve the robustness of the system, especially within the electrically noisy industrial environment. Other features include a typical current transfer ratio of 24 percent. Each device consists of two separate channels to achieve full-duplex data-transmission capability within a single device. These two new optocouplers are identical in electrical parameters and differ only in the internal-biasing configuration. The HCPL-0560 is a VCC-common configuration, in which the anode anode (ăn`ōd), electrode through which current enters an electric device. In electrolysis, it is the positive electrode in the electrolytic cell. anode Terminal or electrode from which electrons leave a system. of the LED of one channel is internally connected to the output-side bias of the second channel. Thus, the LED input current of one channel is a function of the power-supply voltage of the second channel in the package. The HCPL-0561 is a common-ground configuration, in which each isolated ground is common to both channels and both sides of the optoisolator. Both the HCPL-0560 and HCPL-0561 come in the industry-standard, 8-pin surface-mount package and are recognized under UL 1577 for dielectric dielectric (dī'ĭlĕk`trĭk), material that does not conduct electricity readily, i.e., an insulator (see insulation). A good dielectric should also have other properties: It must resist breakdown under high voltages; it should not withstand-proof voltages of 2,500 Vrms for 1 minute. They also are approved under CSA (1) (Canadian Standards Association, Toronto, Ontario, www.csa.ca) A standards-defining organization founded in 1919. It is involved in many industries, including electronics, communications and information technology. Component Acceptance Notice No. 5. -0-
U.S. Unit Prices and Availability
Part No. Quantities
1 - 999 1K - 4,999 5K - 9,999 10K - 24,999
------- ---------- ---------- ------------
HCPL-0560 $3.30 $2.64 $2.19 $1.91
HCPL-0561 3.30 2.64 2.19 1.91
-0- Minimum order is 100. Tape-and-reel packaging option also available, with 1,000 pieces per reel. All versions are available now. About HP Hewlett-Packard Company is a leading global provider of computing, Internet and Intranet solutions, services, communications products and measurement solutions, all of which are recognized for excellence in quality and support. HP has 127,200 employees and had revenue of $42.9 billion in its 1997 fiscal year. Information about HP and its products can be found on the World Wide Web at http://www.hp.com. NOTE TO EDITORS: Sales information may be obtained by calling 800/537-7715, ext. 10058. Please do NOT use the editor contact or corporate telephone numbers for sales information. Information in this release applies specifically to products available in the United States United States, officially United States of America, republic (2005 est. pop. 295,734,000), 3,539,227 sq mi (9,166,598 sq km), North America. The United States is the world's third largest country in population and the fourth largest country in area. . Product availability and specifications may vary in non-U.S. markets. If you choose to review these items, your readers will receive the quickest response to their inquiries by mailing them to Hewlett-Packard Company, Components Response Center, 3175 Bowers Bowers is a surname, and may refer to
M/S Milestone M/S Modeling and Simulation M/S Master/Slave M/S Messieurs (plural of Mister) M/S Minesweeping M/S miles per second M/S Miniature Sheet 88U Santa Clara Santa Clara, city, Cuba Santa Clara (sän`tä klä`rä), city (1994 est. pop. 217,000), capital of Villa Clara prov., central Cuba. , Calif. 95054-9929. |
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