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IP4786CZ32
DVI and HDMI interface ESD and overcurrent protection, DDC/CEC buffering, hot plug detect and backdrive protection
1. General descriptionThe IP4786CZ32 is designed to protect High-Definition Multimedia Interface (HDMI)
transmitter host interfaces. It includes HDMI 5 V overcurrent / overvoltage protection, Data
Display Channel (DDC) buffering and decoupling, hot plug detect, backdrive protection,
Consumer Electronic Control (CEC) buffering and decoupling, and 8kV contact
ElectroStatic Discharge (ESD) protection for all I/Os in accordance with the
IEC 61000-4-2, level 4 standard.
The IP4786CZ32 incorporates Transmission Line Clamping (TLC) technology on the
high-speed Transition Minimized Differential Signaling (TMDS) lines to simplify routing
and help reduce impedance discontinuities. All TMDS lines are protected by an
impedance-matched diode configuration that minimizes impedance discontinuities caused
by typical shunt diodes.
The enhanced 60 mA overcurrent / overvoltage linear regulator guarantees
HDMI-compliant 5 V output voltage levels with up to 6.5 V inputs.
The DDC lines use a new buffering concept which decouples the internal capacitive load
from the external capacitive load for use with standard Complementary Metal Oxide
Semiconductor (CMOS) or Low Voltage Transistor-Transistor Logic (LVTTL) I/O cells
down to 1.8 V. This buffering also redrives the DDC and CEC signals, allowing the use of
longer or cheaper HDMI cables with a higher capacitance. The internal hot plug detect
module simplifies the application of the HDMI transmitter to control the hot plug signal.
All lines provide appropriate integrated pull-ups and pull-downs for HDMI compliance and
backdrive protection to guarantee that HDMI interface signals are not pulled down if the
system is powered down or enters Standby mode. Only a single external capacitor is
required for operation.
2. Features and benefits HDMI 1.3a and 1.4, 340 MHz pixel clock, deep color and HDMI Ethernet and Audio
return Channel (HEAC) compatible Pb-free, Restriction of Hazardous Substances (RoHS) compliant and free of halogen
and antimony (Dark Green compliant) Robust ESD protection without degradation after repeated ESD strikes Impedance matched 100 differential transmission line ESD protection for
TMDS lines (10 ). No Printed-Circuit Board (PCB) pre-compensation required All external I/O lines with ESD protection of at least 8 kV in accordance with the
IEC 61000-4-2, level 4 standard
IP4786CZ32
DVI and HDMI interface ESD and overcurrent protection,
DDC/CEC buffering, hot plug detect and backdrive protection
Rev. 4 — 5 July 2012 Product data sheet
NXP Semiconductors IP4786CZ32
DVI and HDMI interface ESD and overcurrent protection DDC capacitive decoupling between system side and HDMI connector side and
buffering to drive cable with high capacitive load (> 700 pF/25 m) Hot plug detect module CEC buffering and isolation, with integrated backdrive-protected 26 k pull-up Simplified flow-through routing utilizing less overall PCB space Highest integration in a small footprint, PCB level, optimized RF routing,
32-pin HVQFN leadless package
3. Applications The IP4786CZ32 can be used for a wide range of HDMI source devices, consumer
and computing electronics: Standard-Definition (SD) and High-Definition (HD) DVD player Set-top box PC graphic card Game console HDMI picture performance quality enhancer module Digital Visual Interface (DVI)
4. Ordering information Table 1. Ordering informationIP4786CZ32 HVQFN32 plastic thermal enhanced very thin quad flat package; no leads; 32 terminals; body 55 0.85 mm SOT617-3
NXP Semiconductors IP4786CZ32
DVI and HDMI interface ESD and overcurrent protection
5. Functional diagramNXP Semiconductors IP4786CZ32
DVI and HDMI interface ESD and overcurrent protection
6. Pinning information
6.1 Pinning
6.2 Pin description
Table 2. Pin description TMDS_D2+_SYS TMDS to ASIC inside system
2TMDS_D2_SYS TMDS to ASIC inside system TMDS_D1+_SYS TMDS to ASIC inside system
4TMDS_D1_SYS TMDS to ASIC inside system TMDS_D0+_SYS TMDS to ASIC inside system
6TMDS_D0_SYS TMDS to ASIC inside system TMDS_CK+_SYS TMDS to ASIC inside system
8TMDS_CK_SYS TMDS to ASIC inside system DDC_CLK_SYS DDC clock system side DDC_DAT_SYS DDC data system side
NXP Semiconductors IP4786CZ32
DVI and HDMI interface ESD and overcurrent protection DDC_DAT_CON DDC data connector side DDC_CLK_CON DDC clock connector side UTILITY_CON utility line ESD protection TMDS_CK_CON TMDS ESD protection to connector TMDS_CK+_CON TMDS ESD protection to connector TMDS_D0_CON TMDS ESD protection to connector TMDS_D0+_CON TMDS ESD protection to connector TMDS_D1_CON TMDS ESD protection to connector TMDS_D1+_CON TMDS ESD protection to connector TMDS_D2_CON TMDS ESD protection to connector TMDS_D2+_CON TMDS ESD protection to connector CEC_CON CEC signal connector side ESD_BYPASS ESD bias voltage VCC(SYS) supply voltage for level shifting CEC_STBY CEC Standby mode control (LOW for lowest
power, CEC-only mode) CEC_SYS CEC I/O signal system side n.c. not connected n.c. not connected HOTPLUG_DET_SYS hot plug detect system side
ground pad GND ground
Table 2. Pin description …continued
