IP4770CZ16 Datasheet, PDF (1/11 Pages) NXP Semiconductors – VGA/video interface with integrated buffers, ESD protection and integrated termination resistors

IP4770/71/72CZ16
VGA/video interface with integrated buffers, ESD protection
and integrated termination resistors
Rev. 01 — 25 October 2006
Product data sheet
1. General description
The IP4770CZ16, IP4771CZ16, IP4772CZ16 is connected between the VGA/DVI
interface and the video graphics controller and includes level shifting for the DDC signals,
buffering for the SYNC lines as well as high-level ESD protection diodes for the RGB
signal lines.
The level shifting functions are required when the DDC controller operates at a lower
supply voltage than the monitor. To use this level shifting function the gates of the two
N-channel MOSFETs have to be connected to the supply rail of the DDC transceivers.
Buffering for the SYNC signals is provided by two non-inverting buffers, which accept TTL
input levels and convert these to CMOS compliant output levels between pins V_CC(SYNC)
and GND.
The IP4770CZ16 and IP4771CZ16 contain the formerly external termination resistors,
which are typically required for the HSYNC and VSYNC lines of the video interface:
• IP4770CZ16: R_sync = 55 Ω
• IP4771CZ16: R_sync = 65 Ω
• IP4772CZ16: R_sync =10 Ω to allow termination of the SYNC lines
All RGB I/Os are protected by a special diode configuration offering a low line capacitance
of 4 pF (maximum) only to provide protection to downstream components for ESD
voltages as high as ±8 kV contact discharge according to IEC 61000-4-2, level 4 standard.
2. Features
I Integrated high-level ESD protection, buffering, SYNC signal impedance matching and
level shifting
I Terminal connections with integrated rail-to-rail clamping diodes with downstream ESD
protection of ±8 kV according to IEC 61000-4-2, level 4 standard
I Backflow protection on DDC lines
I Drivers for HSYNC and VSYNC lines
I Bidirectional level shifting N-channel FETs available for DDC clock and DDC data
channels
I Integrated impedance matching resistors on SYNC lines
I Line capacitance < 4 pF per channel
I Lead-free package and RoHS compliant