Product category:
Circuit Protection Devices
News Release from: California Micro Devices | Subject: CM1234
Edited by the Electronicstalk Editorial
Team on 29 April 2008
Eight-line ESD protector meets display
demands
PicoGuard XS architecture integrates inductors with the diodes to create fixed point impedance matching for high speed data lines.
The latest addition to the XtremeESD family of electrostatic discharge protection devices from California Micro Devices offers eight channels of ESD protection that meet +/-15kV contact discharge, and +/-20kV air discharge per the IEC61000-4-2 standard Based on the company's PicoGuard XS architecture, the CM1234 also meets the 100ohm differential impedance matching requirements specified in HDMI 1.3a and DisplayPort digital video standards, making the device ideal for use in digital TVs, LCDs, notebook computers, set top boxes and HD DVD recorders
This article was originally published on Electronicstalk on 7 Sep 2006 at 8.00am (UK)
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According to Joe Salvador, CMD Director of Marketing for Computing and Digital Consumer Products: "Consumer electronics manufacturers often test to standards greater than 8kV, particularly on ports easily accessed by consumers such as side and front mounted digital video ports".
"Until now, there were no ESD protection devices that could meet these higher levels of protection and still maintain signal integrity at HDMI 1.3a datarates".
The CM1234 incorporates the recently introduced PicoGuard XS architecture that integrates inductors with the diodes to create fixed point impedance matching for high speed data lines.
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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 PCB 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 CM1234 eliminates the need for these measures, providing matched impedance with no external compensation or components required.
The CM1234 provides protection for four pairs of differential channels, offering ESD protection to IEC61000-4-2 standard +/-15kV contact discharge and +/-20kV air discharge.
The integration of inductors with the ESD diodes provides for improved ESD protection as well as outstanding signal integrity.
Compared with current best in class ESD diode arrays, the CM1234 offers: 40% reduction in peak clamping voltage; 15-40% reduction in peak residual current; 100ohm differential impedance matching with no external compensation required; straight-through routing for improved layout; and a compact 16-pin TDFN package for board space savings.
The CM1234 sampling now, and will be in full production this quarter.
It is priced at US $0.59 each in 1000-unit lots.
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