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IP4786CZ32S
DVI and HDMI interface ESD and overcurrent protection,
DDC/CEC buffering, hot plug detect and backdrive protection
Rev. 3 — 7 January 2015
Product data sheet
1. General description
The IP4786CZ32S is designed to protect High-Definition Multimedia Interface (HDMI)
transmitter host interfaces. It includes HDMI 5 V overcurrent / overvoltage protection,
Display Data Channel (DDC) buffering and decoupling, Hot Plug Detect (HPD), backdrive
protection, Consumer Electronic Control (CEC) buffering and decoupling, and 12 kV
contact ElectroStatic Discharge (ESD) protection for all external I/Os in accordance with
the IEC 61000-4-2, level 4 standard.
The IP4786CZ32S 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 2.0 and all backward compatible standards are supported
6.0 Gbps TMDS Bit Rate (600 Mcsc TMDS Character Rate) compatible
Supports Ultra High-Definition (UHD) 4K (2160p) 60 Hz display modes
Impedance matched 100 differential transmission line ESD protection for
TMDS lines (10 ). No Printed-Circuit Board (PCB) pre-compensation required
Simplified flow-through routing utilizing less overall PCB space
DDC capacitive decoupling between system side and HDMI connector side and
buffering to drive cable with high capacitive load (> 700 pF/25 m)
All external I/O lines with ESD protection of at least 12 kV, exceeding the
IEC 61000-4-2, level 4 standard
IP4786CZ32S
NXP Semiconductors
DVI and HDMI interface ESD and overcurrent protection
Hot plug detect module
CEC buffering and isolation, with integrated backdrive-protected 26 k pull-up
Robust ESD protection without degradation after repeated ESD strikes
Highest integration in a small footprint, PCB level, optimized RF routing,
32-pin HVQFN leadless package
3. Applications
The IP4786CZ32S can be used for a wide range of HDMI source devices, consumer
and computing electronics:
Tablet and notebook PCs
Portable Media Players
Digital Still Cameras (DSC)
High-Definition (HD) and Standard-Definition (SD) Blu-ray and DVD players
Set-top boxes (STB)
PC graphic cards
Game consoles
HDMI picture performance quality enhancer modules
Digital Visual Interface (DVI)
4. Ordering information
Table 1.
Ordering information
Type number
Package
Name
IP4786CZ32S
IP4786CZ32S
Product data sheet
Description
Version
HXQFN32 plastic thermal enhanced extremely thin quad flat
SOT1318-1
package; no leads; 32 terminals; body 4 4 0.5 mm
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 7 January 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
2 of 35
IP4786CZ32S
NXP Semiconductors
DVI and HDMI interface ESD and overcurrent protection
5. Functional diagram
TMDS_D2+_SYS
TMDS_D2+_CON
ESD
TMDS_D2–_SYS
TMDS_D2–_CON
TMDS_D1+_SYS
TMDS_D1+_CON
TMDS_D1–_SYS
TMDS_D1–_CON
TMDS_D0+_SYS
TMDS_D0+_CON
TMDS_D0–_SYS
TMDS_D0–_CON
TMDS_CK+_SYS
TMDS_CK+_CON
TMDS_CK–_SYS
TMDS_CK–_CON
VCC(5V0)
ESD
3.3 V VOLTAGE
REGULATOR
VCC(SYS)
ESD
CEC driver
10 kΩ
26 kΩ
CEC_SYS
CEC_CON
ESD
HDMI_5V0_CON
VCC(SYS)
ESD
DDC driver
3.65 kΩ
1.85 kΩ
DDC_CLK_SYS
DDC_CLK_CON
VCC(SYS)
ESD
HDMI_5V0_CON
ESD
DDC driver
3.65 kΩ
1.85 kΩ
DDC_DAT_SYS
DDC_DAT_CON
Hot plug
ESD
ESD
HOTPLUG_DET_SYS
HOTPLUG_DET_CON
100 kΩ
100 kΩ
ESD
ESD
HDMI_5V0_CON
VCC(5V0)
ESD
ESD_BYPASS
CURRENT LIMITER
VCC(SYS)
main
clamp
VCC(5V0)
ESD
ESD
enable
enLim
enRef
POWER
MANAGEMENT UNIT
CEC_STBY
enCEC
VCC(SYS)
VCC(SYS)
100 kΩ
VCC(5V0)
ESD
ibias 1..n
vref 1..m
CURRENT-/VOLTAGEREFERENCES
Fig 1.
IP4786CZ32S
Product data sheet
n
m
UTILITY_CON
100 kΩ
aaa-013776
Functional diagram
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 7 January 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
3 of 35
IP4786CZ32S
NXP Semiconductors
DVI and HDMI interface ESD and overcurrent protection
6. Pinning information
&(&B&21
9&&6
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