CM2010 Datasheet, PDF (1/4 Pages) California Micro Devices Corp – VGA Port Protection with Integrated Sync Buffers

PRELIMINARY
CM2010
VGA Port Protection with Integrated Sync Buffers
Features
• 3 channels of ESD protection for RGB output 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 typical
• 3.3/5V 24mA buffer drivers for HSYNC and
VSYNC lines
• VESA Video Signal Standard (VSIS) - Version 1,
Rev. 2 Compatible Outputs
• Compact 10-lead MSOP package
• Lead-free version available
Applications
• VGA and DVI-I ports in:
- Desktop and Notebook PCs
- Graphics Cards
- Set Top Boxes
Product Description
The CM2010 connects between a video graphics con-
troller, embedded in a PC or in a graphics adapter
card, and the VGA port connector. The CM2010 inte-
grates ESD protection for 3 VGA output signals imple-
mented with low-capacitance current steering diodes
such that an ESD pulse is diverted into either the posi-
tive supply rail or ground, where it may be safely dissi-
pated.
All ESD diodes are designed to safely handle the high
current spikes specified by IEC61000-4-2 Level 4 ESD
(8kV contact discharge).
Two 24mA non-inverting drivers provide buffering for
the HSYNC and VSYNC signals from the video control-
ler IC (SYNC1, SYNC2). These buffers accept low volt-
age input levels and convert them to CMOS output
levels that swing between Ground and V_{CC_SYNC},
which is typically 5V for Legacy VESA compatibility,
but can be operated at 3.3V. Additionally, the output
impedance of the drivers can be discretely adjusted via
external series termination resistors (R_T) for maximum
flexibility. The output impedance of the drivers can be
adjusted over a wide range from 15Ω to over 100Ω.
The CM2010 is supplied in a 10-lead MSOP package
and is available with optional lead-free finishing.
Simplified Electrical Schematic
V_{CC_VIDEO}
2
3 _{VIDEO_1}
4 _{VIDEO_2}
5 _{VIDEO_3}
V_{CC_SYNC}
SYNC_IN2 ⁹
1
10
SYNC_OUT2
SYNC_IN1 ⁷
8 _{SYNC_OUT1}
GND ⁶
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