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CM2009-01QS Datasheet(PDF) 1 Page - California Micro Devices Corp |
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CM2009-01QS Datasheet(HTML) 1 Page - California Micro Devices Corp |
1 / 6 page © 2004 California Micro Devices Corp. All rights reserved. 08/12/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com 1 CM2009 VGA Port Companion Circuit Features • Includes ESD protection, level-shifting, buffering and sync impedance matching • 7 channels of ESD protection for all VGA port con- nector pins meeting IEC-61000-4-2 Level 4 ESD requirements ( ±8kV contact discharge) • Very low loading capacitance from ESD protection diodes on VIDEO lines, 4pF maximum • 5V drivers for HSYNC and VSYNC lines • Integrated impedance matching resistors on sync lines • Bi-directional level shifting N-channel FETs pro- vided for DDC_CLK & DDC_DATA channels • Backdrive protection on DDC lines • Compact 16-lead QSOP package Applications • VGA and DVI-I ports in: - Desktop and Notebook PCs - Graphics Cards - Set Top Boxes Product Description The CM2009 connects between a video graphics con- troller 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 cur- rent steering diodes. All ESD diodes are designed to safely handle the high current spikes specified by IEC-61000-4-2 Level 4 ( ±8KV contact discharge if CBYP is present, ±4KV 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 interfac- ing with low voltage video controller ICs to provide design flexibility in multi-supply-voltage environments. (cont’d next page) Simplified Electrical Schematic VIDEO_1 VIDEO_2 VIDEO_3 VCC_VIDEO GND SYNC_OUT2 GND VCC_DDC VCC_SYNC SYNC_OUT1 SYNC_IN2 SYNC_IN1 DDC_IN2 DDC_IN1 RT 3 4 5 6 10 11 13 15 1 8 2 14 16 DDC_OUT2 DDC_OUT1 12 9 BYP RT 7 |
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