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New ESD diode arrays housed in micro leadframe packages

Posted: 16 Dec 2005 ?? ?Print Version ?Bookmark and Share

Keywords:STMicroelectronics? st? ESD diode array? ESDALC6V1M3?

ESD diode arrays

STMicroelectronics has introduced a new series of ESD diode arrays in ultra-small micro leadframe packages, which are designed to protect static-sensitive equipment from damage or degradation caused by overvoltage transients.

Due to their extremely small size, said ST, the new devices are ideal for ESD protection in designs where board space is at a premium, such as cellphones, digital cameras, MP3 players and other portable applications, as well as in computer and telecom products. Each device in the new series offers ESD protection for between one line and five lines, meeting design flexibility requirements across a range of applications.

The ESDALC6V1M3 is a low capacitance device with two ESD diodes integrated in an SOT883 package. It can be used for 1-line or 2-line ESD protection in various kinds of application. The diode capacitance is around 7pF (Vr=2.5V), making it suitable for high speed data lines or other I/O interfaces. This product is housed in SOT883 package, with an area of 0.6mm?, providing up to 50 percent space saving compared to an SOD523 package.

The ESDA(LC)6V1M6 and ESDA(LC)6V1-5M6 are 4-line and 5-line ESD diode arrays in a micro leadframe package (Micro QFN). Two levels of diode capacitance are available to meet different application requirements in terms of data rate, power dissipation and other criteria. The capacitance is less than 7pF (Vr=2.5V) for the ESDALC6V1xxM6 series, and 41pF (Vr=2.5V) for the ESDA6V1xxM6 series. ST said that the Micro QFN-6L is the smallest plastic package on the market for an ESD array of up to 5 diodes, its size of 1.45-by-1mm which provides a 44 percent spacing saving comparing to the current SOT666.

All of the new devices provide ESD protection against surges up to 15kV, meeting the IEC61000-4-2 level 4 specification for ESD immunity. The ESDALC6V1M3 is priced at 10 cents, and the ESDA(LC)6V1xxM6 series is in the range 20 cents to 25 cents, in quantities of 30,000.

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