The Entire Bandwidth of the High-Speed Photocoupler
Sharp presents its range of new, high-speed photocouplers for high voltage spikes
Hamburg, October, 28 2005 – Sharp Microelectronics is expanding its family of photocouplers by adding some components for specific models with transfer rates of 1Mbit, 10Mbit or 25 Mbit per second. Whereas all high-speed photocouplers function within an ambient temperature ran-ge of -40 to +85 degrees Celsius, the 1 Mbit high-speed photocoupler goes beyond this – it is designed to work in an expanded temperature range of -55 to +100 degrees Celsius. Depending on the type of photocoupler, the components provide voltage isolation of 3.75kV or 5.0kV. This high degree of electric breakdown strength, good temperature and moisture stability are made possible by the “Double-Transfer Mold Technology". In a two-stage molding process, the pho-toelements are 1) coated with a transparent resin and then 2) covered with a non-transparent resin, which are high-temperature-resistant epoxy resins. This technology enables the compo-nents to withstand peak temperatures of 260 degrees Celsius during reflow and dip soldering.
The high switching speed (25Mb/s) of the optoelectronic components is achieved by using high-speed LEDs (GaAIAs) with Sharp driver CMOS ICs and the OPICTM method. This technology, which was also developed by Sharp, integrates the photodiode and the IC signal processor on one chip.
Sharp's high-speed photocouplers provide reliable serial transfers and can be used in a large number of premium applications. In the factory automation sector, these include field bus appli-cations, such as: DeviceNet, Profibus and Interbus. In the area of computer networking, the high-speed products are used in interfaces such as RS422 or RS485.
Today, the new components are already free of hazardous substances and thus compliant with the RoHS Guidelines that will come into force in July of 2006 (restrictions on the use of hazar-dous substances), as well as global safety standards such as UL or VDE. Depending on the de-sign, Sharp offers its high-speed photocouplers in both SOP 8 and DIP 8 housings.
Availability
The new high-speed photocoupler design series is already in series production and can be obtai-ned through Sharp's sales offices and distribution partners worldwide. In November 2005, the 8-pin SOP models PC457S0NIP0F (1 Mbit/s), PC410S0NIP0F (10 Mbit/s) and PC4D10SNIP0F (10 Mbit/s) will go into series production. Samples are available.
About Sharp Microelectronics Europe
Sharp Microelectronics Europe, Hamburg, Germany, is a divisional company of Sharp Electronics (Europe) GmbH, which is a subsidiary of Sharp Corporation, Osaka, Japan. Sharp is a worldwide developer of core digital technologies that are playing an integral role in shaping the next generation of electronic products for consumer and business needs. Sharp Microelectronics Europe offers groundbreaking solutions in the areas of memory products, LCD, Opto Components, CCD, RF/IR, microcomputer and system-on-chip components, along with packaging and integration skills that help design engineers throughout Europe to bring their ambitious ideas to market. Sharp Microelectronics Europe is dedicated to improving people’s lives through the use of advanced technology and a commitment to innovation, quality, value and design.
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Ralf Schäfer
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