VGA interface with integrated h-sync buffer, ESD protection and termination resistor

The IP4774CZ14 is a VGA or DVI-I interface intended for connection between a video transmitter such as a PC graphics card and a VGA or DVI-I receiver, such as a PC monitor. The IP4774CZ14 has ESD protection for the DDC lines, ESD protection plus buffering for the h-sync line, and high-level ESD protection diodes for the RGB video signal lines.

The h-sync signal is buffered by a non-inverting buffer which can accept TTL-level input. The buffer convert TTL-level input to CMOS-level output which swings between VCC(SYNC) and GND.

An external termination resistor can be added to achieve the desired termination, which is typically required for the h-sync line of the video interface.

The IP4774CZ14 has a typical output resistance (RO) of 10 Ω