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Optocouplers in "Stretched" SMT Package Meets Stringent Safety Regulations

27th June 2006

ES Admin

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Avago Technologies has introduced a series of high-speed optocouplers in Stretched Small Outline (SSO) packages with two new features: they are as much as 50 percent smaller than conventional dual-inline packages while providing up to 8 mm of creepage and clearance to meet stringent IEC, UL and CSA reinforced safety and insulation regulatory requirements. Applications for the SSO6 and SSO8 (6 and 8 pins, respectively) packages include digital logic ground isolation, line receivers, isolation for analog-to-digital and digital-to-analog converters, computer-peripheral interfaces, and intelligent power module interfaces for motor drives.

Today's electrical safety standards specify creepage and clearance. Creepage is a spacing distance measured over a surface, such as the surface of an optocoupler. Clearance is the shortest distance through air, such as between pins of an optocoupler. Many IEC equipment standards now call for 8 mm creepage and clearance distances. The clearance and creepage specifications of these SSO6 and SSO8 packages make them suitable for safety-critical applications including electronic equipment for use in power installations.

"Many of Avago's customers have been seeking ways to design smaller PC boards that can meet international safety standards," said Kheng-Jam Lee, worldwide marketing manager for isolation products in Avago Technologies' Optical Communication Solutions Division. "We will meet the size and safety requirements of our customers by offering an expanding range of optocoupler products in the widely accepted SSO6 and SSO8 package configurations."

The ACPL-P454, ACPL-W454 and ACPL-K453 are 1 MBd (megabaud) optocouplers. They feature 15 kV/us minimum common mode transient immunity at 1500 V common-mode voltage (VCM) and operation over the 0° C to +70° C temperature range.

The ACPL-P611 and ACPL-W611 are 10 MBd optocouplers. They feature 10 kV/us min. CMR at 1000 V VCM, with a low 5 mA input current capability, and both AC and DC performance are specified over -40° C to +85° C.

The ACPL-W60L and ACPL-K63L are 15 MBd low-voltage (3.3 V) optocouplers. They feature low power consumption, 15 kV/us min. CMR at 1KV VCM, compatibility with low-voltage TTL and CMOS circuitry, and 5 mA input current capability. Both AC and DC performance are specified over -40°C to +85° C.

The "P" package is a stretched SO6 (6-pin) surface-mount package with dimensions of 4.58 mm by 9.7 mm by 3.18 mm, suitable for single-channel optocouplers. It has 7 mm clearance and 8mm creepage.

The "W" package is a stretched SO6 surface-mount package with dimensions of 4.58 mm by 11.5 mm by 3.180 mm, suitable for single-channel optocouplers. It is specified for 8-mm clearance and creepage.

The "K" package is a stretched SO8 (8-pin) surface-mount package with dimensions of 5.80 mm by 11.5 mm by 3.180 mm, suitable for single- and two-channel optocouplers. It is also specified for 8-mm clearance and creepage.

All package versions are lead-free and meet RoHS requirements.