HDMI ESD protection, level shifter and backdrive protection

The IP4791CZ12 is designed to protect mobile High-Definition Multimedia Interface (HDMI) transmitter interfaces. It includes level shifting for the Data Display Channel (DDC), Consumer Electronic Control (CEC), hot plug signal and backdrive protection. In addition, all signals are protected by high-level ElectroStatic Discharge (ESD) protection diodes.

The level shifting function is required to protect the I/Os against overvoltages when the transmitter operates at a supply voltage lower than the external devices. The IP4791CZ12 contains active buffers to provide the level shifting function, hot plug detect input and the CEC pull-up current source.

The ESD protection diodes provide protection from ESD voltages up to ±8 kV, according to IEC 61000-4-2, level 4.


  • HDMI 1.3 compliant
  • Pb-free, Restriction of Hazardous Substances (RoHS) compliant and free of halogen and antimony (Dark Green compliant)
  • Robust ESD protection without degradation after multiple ESD strikes
  • Low leakage even after several hundred ESD discharges
  • Bidirectional level shifting buffer provided for DDC clock and data channels
  • Backdrive protection
  • Power management
  • CEC pull-up current source and level shifting buffer
  • Hot plug detect module with pull-down resistor
  • Matched 0.4 mm trace spacing for HDMI type C connector

Target applications

The IP4791CZ12 can be used with a range of HDMI transmitter devices including:

  • Personal computer
  • Notebook
  • Mobile phone
  • DV camcorder
  • Digital still camera
  • MP3 player


Type numberPackage versionPackage nameSize (mm)No of protected linesCd [typ] (pF)VESD IEC61000-4-2 (kV)ApplicationBufferLevel shifter
IP4791CZ12SOT1156-1DFN2521-122.5 x 2.1 x 0.55810HDMI transmitter signal conditioningyy


Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT1156-1Reel 7" Q1/T1, Q3/T4ActiveStandard MarkingIP4791CZ12,132
( 9340 646 25132 )


Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
IP4791CZ12IP4791CZ12,132IP4791CZ12Always Pb-free881.04.092.44E811
Quality and reliability disclaimer

Documentation (5)

File nameTitleTypeDate
IP4791CZ12HDMI ESD protection, level shifter and backdrive protectionData sheet2017-06-02
75017259NXP solutions for consumer and computer interfacesBrochure2012-04-24
75017090Application guide; Portable devices and mobile handsetsSelection guide2012-03-12
SOT1156-1_132HXSON12; Reel pack, SMD, 7" Q1/T1 standard product orientation; Orderable part number ending ,132 or XL Ordering code (12NC) ending 132Packing2015-06-01
SOT1156-1plastic, thermal enhanced extremely thin small outline package; 12 terminals; 0.4 mm pitch; 2.5 mm x 2.1 mm x 0.5 mm bodyOutline drawing2017-01-30


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