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.

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

CM2009属于电路保护 > TVS - 混合技术。安森美半导体公司制造生产的CM2009TVS - 混合技术混合技术 TVS（瞬态电压抑制器）产品族中的产品属于过压保护产品，其中结合了基于多种技术的保护机制，例如串联连接的 MOV（金属氧化物压敏电阻）和 GDT（气体放电管），旨在同时获得低漏电流和自恢复箝位工作特性。