UNISONIC TECHNOLOGIES CO., LTD

CCVGA7C9

Preliminary

TVS

www.unisonic.com.tw

1 of 6

Copyright © 2013 Unisonic Technologies Co., Ltd

QW-R223-015.a

VGA OR DVI-I PORT

COMPANION CIRCUIT



DESCRIPTION

The UTC CCVGA7C9 is an ESD solution for the VGA or DVI-I

port connector. This device integrates 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.

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.

Two non-inverting drivers provide buffering for the HSYNC and VSYNC signals from the video controller IC

(SYNC1, SYNC2). These buffers accept TTL input levels and convert them to CMOS output levels that swing

connected to the SYNC_OUT pin, eliminating the external termination resistors typically required for the HSYNC and

VSYNC lines of the video cable. There are three versions with different values of RT to allow termination at typically

65Ω (UTC CCVGA7C9−00) or 15Ω (UTC CCVGA7C9−02).

Two N-channel MOSFETs provide the level shifting function required when the DDC controller is operated at a

supply rail (typically 3.3 V) that supplies power to the transceivers of the DDC controller.

All ESD diodes are designed to safely handle the high current spikes specified by IEC-61000-4-2 Level 4 (±8kV

prevent “back current” when the device is powered down while connected to a monitor that is powered up.



FEATURES

* 7 Channels of ESD protection for all VGA port connector pins

meeting IEC-61000-4-2 Level 4 ESD requirements (±8kV

contact discharge)

* Includes ESD protection, level-shifting, buffering and sync

impedance matching

* 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

provided for DDC_CLK & DDC_DATA channels

* Backdrive protection on DDC lines



ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

CCVGA7C9L-R16-T

CCVGA7C9G-R16-T

SSOP-16

Tube

CCVGA7C9L-R16-R

CCVGA7C9G-R16-R

SSOP-16

Tape Reel