IP4778CZ38

HDMI ESD protection, DDC buffering and hot plug control


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The IP4778CZ38 is designed for HDMI receiver host interface protection.

The IP4778CZ38 includes DDC buffering, slew rate acceleration and decoupling, hot plug control, backdrive protection, CEC slew rate control, optional multiplexing of DDC signals, and high-level ESD protection diodes for all HDMI signals.

The DDC lines are buffered using a new buffering concept which decouples the internal capacitive load from the external capacitive load. This allows higher PCB design flexibility for the DDC lines with respect to a maximum load of 50 pF. This buffering also boosts the DDC signals, allowing the use of longer HDMI cables having a higher capacitive load than 700 pF. The CEC slew rate limiter prevents ringing on the CEC line and greatly reduces the number of discrete components needed by the CEC application. HDMI receiver and system GPIO applications are simplified by an internal hot plug driver module and hot plug control.

The DDC, hot plug and CEC lines are backdrive protected to guarantee HDMI interface signals are not pulled down if the system is powered down or enters Standby mode.

All TMDS intra-pairs are protected by a special diode configuration offering a low line capacitance of 0.7 pF only (to ground) and 0.05 pF between the TMDS pairs. These diodes provide protection to components downstream from ESD voltages of up to ±8 kV contact in accordance with the IEC 61000-4-2, level 4 standard.

Features and benefits

  • Pb-free and RoHS compliant
  • Robust ESD protection without degradation after several ESD strikes
  • Low leakage even after several hundred ESD discharges
  • Very high diode switching speed (ns) and low line capacitance of 0.7 pF to ground and 0.05 pF between channels ensures signal integrity
  • DDC capacitive decoupling between system side and HDMI connector side and drive cable buffering with capacitive load (> 700 pF)
  • Hot plug control for direct connection to system GPIO
  • CEC ringing prevention by slew rate limiter
  • DDC and hot plug enable signal for multiplexing and backdrive protection
  • All TMDS lines with integrated rail-to-rail clamping diodes with downstream ESD protection of ±8 kV in accordance with IEC 61000-4-2, level 4
  • Matched 0.5 mm trace spacing
  • Component count reduction of HDMI receiver application
  • Highest integration in a small footprint, PCB level, optimized RF routing, 38-pin TSSOP lead-free package
  • Choice of system compatible or RF routing optimized pinning variants

Applications

  • The IP4778CZ38 can be used for a wide range of HDMI sink devices e.g.:
    • TV
    • Projectors
    • PC monitors
    • HDMI buffer modules (extensions of HDMI cable length)
    • HDMI picture performance quality enhancer modules
All information on this product information page is subject to the subsequent disclaimers:
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Parametrics of this product

Type numberPackagePackage nameNr of protected linesCd [typ] (pF)VESD IEC61000-4-2 (kV)ApplicationSize (mm)BufferLevel shifter
IP4778CZ38SOT510-1
(TSSOP38)		TSSOP38120.78HDMI receiver signal conditioning9.7 x 4.4 x 1.1yy

Products / Packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
IP4778CZ38IP4778CZ38,1189340 611 16118Volume productionSOT510-1
(TSSOP38) 		Reel Pack, SMD, 13"Standard Marking

The variants in the table below are discontinued. See the table Discontinuation information at the bottom of this page for more information.

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
IP4778CZ38/VIP4778CZ38/V,1189340 615 86118Discontinued
Replacement product		SOT510-1
(TSSOP38) 		Reel Pack, SMD, 13"Standard Marking

Discontinuation information

Type numberOrdering code (12NC)Last-time buy dateLast-time delivery dateReplacement productDN NoticeStatusComments
IP4778CZ38/V93406158611830-Jun-1231-Dec-12DN 201112005DNVersion WithdrawalMultiple Source. Standard End of Life. No Replacement Part.

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
IP4778CZ38IP4778CZ38,118IP4778CZ38Always Pb-free11

The variants in the table below are discontinued. See the table Discontinuation information at the bottom of this page for more information.

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
IP4778CZ38/VIP4778CZ38/V,118IP4778CZ38/VAlways Pb-free11
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Discontinuation information

Type numberOrdering code (12NC)Last-time buy dateLast-time delivery dateReplacement productDN NoticeStatusComments
IP4778CZ38/V93406158611830-Jun-1231-Dec-12DN 201112005DNVersion WithdrawalMultiple Source. Standard End of Life. No Replacement Part.

Documentation for this product

TypeFormatTitleDate
Data sheetpdfHDMI ESD protection, DDC buffering and hot plug control (v.3.0)2011-04-05

Ordering & availability

Type numberOrdering code(12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
IP4778CZ389340 611 16118IP4778CZ38,118NADIGI-KEY CORPORATION6,5815/24/2012Buy online 
   NAMOUSER ELECTRONICS1,0155/24/2012Buy online 
   NAMOUSER ELECTRONICS1,0155/24/2012Buy online 
   NAFUTURE ELECTRONICS105/23/2012Buy online 
   EUFUTURE ELECTRONICS UK105/23/2012Buy online 
   ASIAFUTURE ELECTRONICS- ASIA105/23/2012Buy online 
   JAPANCHIP ONE STOPyes05/14/2012Buy online 

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