UNISONIC TECHNOLOGIES CO., LTD

VGA7S019

Preliminary

TVS DIODE

www.unisonic.com.tw

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Copyright © 2016 Unisonic Technologies Co., Ltd

QW-R223-024.c

7-CHANNEL INTEGRATED

ESD SOLUTION FOR VGA

PORT WITH INTEGRATED

LEVEL SHIFTER AND

MATCHING IMPEDANCE



DESCRIPTION

The UTC VGA7S019 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

between Ground and VCC_SYNC, which is typically 5V. Additionally, each driver has a series termination resistor

(RT) connected to the SYNC_OUT pin, eliminating the external termination resistors typically required for the

HSYNC and VSYNC lines of the video cable. At the SYNC output the UTC VGA7S019 offers 65-Ω, 55-Ω, or 15-Ω

series termination resistor option to match different transmission line impedances.

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

lower supply voltage than the monitor. The gate terminals for the MOSFETs (VCC_DDC) should be connected to the

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

The UTC VGA7S019 confirms the IEC61000-4-2 (Level 4) system level ESD protection and ±15KV HBM ESD

protection. This device is offered in space-saving SSOP-16 packages.



FEATURES

* 7 Channels of ESD protection for all VGA port connector

pins meeting IEC-61000-4-2 Level 4 ESD requirements

(±8kV contact discharge)

* Integrated impedance matching resistors on sync lines:

–

VGA7S019-15: 15Ω Termination

–

VGA7S019-55: 55Ω Termination

–

VGA7S019-65: 65Ω Termination

* Includes ESD protection, level-shifting, buffering and

sync impedance matching

* 5V drivers for HSYNC and VSYNC lines

* Very low loading capacitance from ESD protection

diodes on VIDEO lines (2.5pF)

* Bi-Directional level shifting N-Channel FETs

provided for DDC_CLK and DDC_DATA channels

* Flow-Through single-in-line pin mapping ensures no

additional board layout burden while placing the ESD

protection chip near the connector