CCVGA7C5 Datasheet, PDF (1/6 Pages) Unisonic Technologies – VGA PORT COMPANION CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD
CCVGA7C5
Preliminary
TVS
VGA PORT COMPANION
CIRCUIT
 DESCRIPTION
The UTC CCVGA7C5 is an ESD solution for the VGA port
connector. This device integrates ESD protection for all signals,
Two non-inverting drivers provide buffering for the HSYNC
and VSYNC signals from the video controller IC. These buffers
accept TTL input levels and convert them to CMOS output levels
that swing between Ground and V_CC 。 These drivers have a
nominal 60Ω output impedance to match the characteristic
impedance of the HSYNC and VSYNC lines of the video cables
typically used. The inputs of these drivers also have high
impedance pull−ups (50kΩ nom.) pulling up to the VAUX rail.
In addition, the DDC_CLOCK and DDC_DATA channels have
1.8kΩ resistors pulling these inputs up to the main 5V (V_CC) rail.
The upper ESD diodes for the R, G and B channels are connected to a separate supply rail (V_RGB) to facilitate
interfacing to graphics controller ICs with low voltage supplies. The remaining channels are connected to the main 5
V rail (V_CC). The lower diodes for the R, G and B channels are also connected to a dedicated ground pin (GNDA) to
minimize crosstalk due to common ground impedance.
ESD protection is implemented with current steering diodes designed to safely handle the high peak surge currents
associated with the IEC−1000−4−2 Level−4 ESD Protection Standard (±8kV contact discharge). When the channels
are subjected to an electrostatic discharge, the ESD current pulse is diverted via the protection diodes into the
positive supply rails or ground where they may be safely dissipated.
 FEATURES
* 7 Channels of ESD Protection Designed to Meet
IEC−1000−4−2 Level−4 ESD Requirements (±8kV Contact
Discharge)
* Three Independent Supply Pins (V_CC, V_RGB and V_AUX) to
Facilitate Operation with Sub−Micron Graphics Controller ICs
* Very Low Loading Capacitance from ESD Protection Diodes
at Less than 5pF Typical
* TTL to CMOS Level−Translating Buffers for the
HSYNC and VSYNC Lines
* High impedance Pull−Ups (50kΩ Nominal to
VAUX) for HSYNC and VSYNC Inputs
* Pull−Up Resistors (1.8kΩ Nominal to V_CC) for
DDC_CLK and DDC_DATA Lines
 ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
CCVGA7C5L-R16-T
CCVGA7C5G-R16-T
CCVGA7C5L-R16-R
CCVGA7C5G-R16-R
Package
SSOP-16
SSOP-16
Packing
Tube
Tape Reel
CCVGA7C5L-R16-T
(1)Packing Type
(2)Package Type
(3)Lead Free
(1) T: Tube, R: Tape Reel
(2) R16: SSOP-16
(3) L: Lead Free, G: Halogen Free
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