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Circuit Protection Devices
News Release from: Sharp Microelectronics Europe | Subject: Photocouplers
Edited by the Electronicstalk Editorial
Team on 31 October 2005
Photocouplers race up to 25Mbit/s
Sharp Microelectronics is expanding its family of photocouplers by adding some components for specific models with transfer rates of 1, 10 or 25Mbit/s.
Sharp Microelectronics is expanding its family of photocouplers by adding some components for specific models with transfer rates of 1, 10 or 25Mbit/s Whereas all high-speed photocouplers function within an ambient temperature range of -40 to +85C, the 1Mbit/s high-speed photocoupler goes beyond this - it is designed to work in an expanded temperature range of -55 to +100C
This article was originally published on Electronicstalk on 29 Nov 2004 at 8.00am (UK)
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Photocouplers speed to 25Mbit/s
Sharp Microelectronics Europe has broadened its photocoupler portfolio with a range of new high-speed products.
Further devices are added to photocoupler family
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.
Depending on the type of photocoupler, the components provide voltage isolation of 3.75 or 5.0kV.
This high degree of electric breakdown strength, good temperature and moisture stability are made possible by "double-transfer mould technology".
In a two-stage moulding process, the photoelements are coated with a transparent resin and then covered with a nontransparent resin, which are high-temperature-resistant epoxy resins.
This technology enables the components to withstand peak temperatures of 260C during reflow and dip soldering.
The high switching speed (25Mbit/s) of the optoelectronic components is achieved by using high-speed LEDs (GaAIAs) with Sharp driver CMOS ICs and the Opic 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 fieldbus applications, 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 2006, as well as global safety standards such as UL or VDE.
Depending on the design, Sharp offers its high-speed photocouplers in both SOP-8 and DIP-8 housings.
The new high-speed photocoupler design series is already in series production and can be obtained through Sharp's sales offices and distribution partners worldwide.
In November 2005, the 8-pin SOP models PC457S0NIP0F (1Mbit/s), PC410S0NIP0F (10Mbit/s) and PC4D10SNIP0F (10Mbit/s) will go into series production.
Samples are available.
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