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10.06.2009
Originally featured on BroadcastEngineering.com
STMicroelectronics cuts ESD protection diodes size by two-thirds

STMicroelectronics new series of ESD protection diodes are 67 percent smaller than previous-generation alternatives, withstand IEC61000-4-2 ESD test pulse and deliver low clamping voltages that improve protection for modern, low-voltage ICs.

The ESDALCxx-1U2 family, in the space-stingy ST0201 package, has a footprint of 0.18sq-mm. This tiny circuit-saver reduces the board space needed to provide mandatory protection in portable devices such as mobile phones, GPS receivers and MP3 players. As well as letting designers implement extra features in the vacated space, these smaller diodes also simplify circuit board layout. Because their .3mm by .6mm dimensions match the industry-standard 0201 outline for miniature surface-mount passives, board designers can quickly select the optimum solder-pad pattern from available CAD component libraries.

The three devices in the family — ESDALC3V9-1U2, ESDALC6V1-1U2 and ESDALC14V2-1U2 — have breakdown voltages of 3.9V, 6.1V and 14.2V, respectively, so designers can choose for the best clamping voltage for the ICs being protected. All the new devices can survive multiple strikes up to IEC61000-4-2 Level 4, which specifies a contact-discharge pulse of 8kV and 30A surge current. Additional benefits of the new diodes include low leakage current, which minimizes drain on the battery, and low device capacitance of 6pF or 12pF to minimize the effects on signal speeds.

They are available immediately, in RoHS-compliant packaging, priced at $0.09 each for 100,000 pieces.

For more information, visit www.st.com/stonline/products/families/protection/protection.htm.



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