(Source: PRNewswire-FirstCall)
MILPITAS, Calif., Aug. 18 /PRNewswire-FirstCall/ -- California Micro Devices today introduced the latest ESD (electrostatic discharge) protection device in the XtremeESD family utilizing the PicoGuard XS architecture, the CM1238. It provides 8 channels of ESD protection that meet + -15kV contact discharge, and + -20kV air discharge per the IEC61000-4-2 standard as well as the 100 Ohm differential impedance matching requirements of the HDMI 1.3a and DisplayPort(TM) digital video standards. The CM1238 utilizes the second generation of the PicoGuard XS architecture based on a smaller diode design that enables enhanced signal integrity, smaller form factor and lower product cost while maintaining ESD protection at an industry leading 20kV level. It is ideal for digital TVs, LCD displays, notebook computers, set top boxes, and HD DVD recorders.
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"Consumer electronics designers face a broad array of design challenges in meeting consumer requirements for greater functionality and higher performance at ever decreasing prices," stated Kyle Baker, vice president of marketing for California Micro Devices. "The CM1238 creates customer value by providing better performance and a smaller size at a lower price point."
PicoGuard XS Impedance Matching and Signal Integrity
The CM1238 incorporates the PicoGuard XS architecture that integrates inductors with the diodes to create fixed point impedance matching for high speed data lines. Traditionally, system designers must compensate for the capacitance of the ESD protection device by adding external inductance, eliminating capacitance under the signal traces near the ESD device, or both. These approaches add complexity and cost, and are printed circuit board dependent, limiting the ability to use multiple board vendors. In many cases, this may not even be possible, particularly if the capacitance of the device is too high as is typical with existing 20kV ESD devices. The CM1238 eliminates the need for these measures, providing matched impedance with no external compensation or components required.
Robust ESD Protection
Delivering robust ESD protection requires much more than achieving compliance with industry standards. Standards define the level of ESD a protection solution can withstand before failing, but do not characterize the level of residual current that passes through the diode and reaches the device under protection. Therefore, it is important to select a device that not only complies with industry standards, but also ensures a low clamping voltage and low residual current.
