PRELIMINARY
CM2006
Application Information
VCC_5V
Optional EMI Filters
VSYNC
HSYNC
C11
FB4
C12
0.22uF
VSYNC
ENABLE
V
CC
C9
FB3
C10
HSYNC
SYNC_IN1 SYNC_OUT1
DDCA_CLK
DDCA_DATA
C7
FB2
C8
SYNC_IN2 SYNC_OUT2
DDC_IN1
DDC_OUT1
DDC_OUT2
R
R
DDC_CLK
DDC_DATA
C5
FB1
C6
DDC_IN2
CM2006
RED_VIDEO
GREEN_VIDEO
BLUE_VIDEO
VF**
VF**
VF**
** VIDEO Filters.
VIDEO_1
VIDEO_2
VIDEO_3
V
CC_DDC
BYP
0.22uF
RED
GREEN
BLUE
75
75
75
Video Port
Connector
V
CC_GPIO
Figure 1. Typical Application Connection Diagram
NOTES
1 The CM2006 should be placed as close to the VGA or DVI-I connector as possible.
2 The ESD protection channels VIDEO_1, VIDEO_2, VIDEO_3 may be used interchangeably between the R, G, B signals.
3 If differential video signal routing is used, the RED, BLUE, and GREEN signal lines should be terminated with external 37.5
ohm resistors.
4 "VF" are external video filters for the RGB signals.
5 Supply bypass capacitors C1 and C2 must be placed immediately adjacent to the corresponding Vcc pins. Connections to
the Vcc pins and ground plane must be made with minimal length copper traces (preferably less than 5mm) for best ESD
protection.
6 The bypass capacitor for the BYP pin has been omitted in this diagram. This results in a reduction in the maximum ESD
withstand voltage at the DDC_OUT pins from
±8kV
to
±2kV.
If 8kV ESD protection is required, a 0.22
μ
F ceramic bypass
capacitor should be connected between BYP and ground.
7 The SYNC buffers may be used interchangeably between HSYNC and VSYNC.
8 The EMI filters at the SYNC_OUT and DDC_OUT pins (C5 to C12, and Ferrite Beads FB1 to FB4) are for reference only.
The component values and filter configuration may be changed to suit the application.
9 The DDC level shifters DDC_IN, DDC_OUT, may be used interchangeably between DDCA_CLK and DDCA_DATA.
10 R1, R2 are optional. They may be used, if required, to pull the DDC_CLK and DDC_DATA lines to VCC_5V when no mon-
itor is connected to the VGA connector. If used, it should be noted that "back current" may flow between the DDC pins and
VCC_5V via these resistors when VCC_5V is powered down.
© 2006 California Micro Devices Corp. All rights reserved.
02/21/06
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.cmd.com
5
CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
