CM2009屬于電路保護(hù)的TVS-混合技術(shù)。由安森美半導(dǎo)體公司制造生產(chǎn)的CM2009TVS - 混合技術(shù)混合技術(shù) TVS（瞬態(tài)電壓抑制器）產(chǎn)品族中的產(chǎn)品屬于過壓保護(hù)產(chǎn)品，其中結(jié)合了基于多種技術(shù)的保護(hù)機(jī)制，例如串聯(lián)連接的 MOV（金屬氧化物壓敏電阻）和 GDT（氣體放電管），旨在同時(shí)獲得低漏電流和自恢復(fù)箝位工作特性。

Product Description

The CM2009 connects between a video graphics controller embedded in a PC, graphics adapter card or set top box and the VGA or DVI?I port connector. The CM2009 incorporates ESD protection for all signals, level shifting for the DDC signals and buffering for the SYNC signals. ESD protection for the video, DDC and SYNC lines is implemented with low?capacitance current steering diodes.

All ESD diodes are designed to safely handle the high current spikes specified by IEC?61000?4?2 Level 4 (±8 kV contact discharge if CBYP is present, ±4 kV if not). The ESD protection for the DDC signal pins are designed to prevent “back current” when the device is powered down while connected to a monitor that is powered up.

Separate positive supply rails are provided for the VIDEO, DDC and SYNC channels to facilitate interfacing with low voltage video controller ICs to provide design flexibility in multi?supply?voltage environments.

特性 Features

? Includes ESD Protection, Level?Shifting, Buffering and Sync Impedance Matching

? 7 Channels of ESD Protection for all VGA Port Connector Pins Meeting IEC?61000?4?2 Level 4 ESD Requirements (±8 kV Contact Discharge)

? Very Low Loading Capacitance from ESD Protection Diodes on VIDEO Lines (4 pF Maximum)

? 5 V Drivers for HSYNC and VSYNC Lines

? Integrated Impedance Matching Resistors on Sync Lines

? Bi?directional Level Shifting N?Channel FETs Provided for DDC_CLK & DDC_DATA Channels

? Backdrive Protection on DDC Lines

? Compact 16?Lead QSOP Package

? These Devices are Pb?Free and are RoHS Compliant

Applications

? VGA and DVI?I Ports in:

? Desktop and Notebook PCs

? Graphics Cards

? Set Top Boxes