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 VCC 。 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 addi...