IP4774CZ14 Datasheet, PDF (1/12 Pages) NXP Semiconductors – VGA interface with integrated h-sync buffer, ESD protection and termination resistor

IP4774CZ14
VGA interface with integrated h-sync buffer, ESD protection
and termination resistor
Rev. 01 — 24 February 2009
Objective data sheet
1. General description
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 V_CC(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 (R_O) of 10 Ω.
2. Features
I Integrated high-level ESD protection, buffering, sync-signal impedance matching
I All pin connections have integrated rail-to-rail clamping diodes providing downstream
ESD protection of ±8 kV according to IEC 61000-4-2, level 4
I Driver for h-sync line
I Line capacitance < 4 pF per channel
3. Applications
Buffer and terminating channels, reduce EMI/RFI and provide downstream ESD
protection for:
I VGA interfaces including DDC channels
I Desktop and notebook PCs, LCD TVs and PC monitors
I Graphics cards
I Set-top boxes
I Game consoles
I DVD players