原标题：NXP IP4776CZ38 HDMI接口解决方案

　　nxp公司的IP4776CZ38是全集成的HDMI接口器件,集成了电平转移,ESD和背驱保护等功能. IP4776CZ38和HDMI 1.3兼容,每路的线电容仅为0.7pF,线间隔和0.5mm匹配,提供可用于DDC时钟和数据通路的双向电平转移N沟FET, ESD保护±8 kV,主要用在TV,图像卡,STB,DVD,数字媒体适配器和游戏控制台.本文介绍了IP4776CZ38主要特性和优势, 功能方框图, HDMI发送器和接收器应用框图以及PCB布局方案框图.

　　Fully integrated HDMI interface with level shifter, ESD and backdrive protection

　　The IP4776CZ38 is designed for HDMI host-interface protection. The IP4776CZ38 includes level shifting for the DDC channels and backdrive protection for HDMI as well as high-level ESD protection diodes for the TMDS signal lines.

　　The level shifting function is required when the receiver operates at a supply voltage lower than the external devices to protect the I/Os against over voltages. The IP4776CZ38 contains four N-channel MOSFETs to provide this level shifting function.

　　Furthermore, all TMDS intra-pairs are protected by a special diode configuration offering an ultra low line capacitance of 0.7 pF only. These diodes provide protection to downstream components from ESD voltages up to ±8 kV contact according to the IEC 61000-4-2, level 4 standard.

　　IP4776CZ38主要特性和优势:

　　Pb-free and RoHS compliant, Dark Green

　　Integrated high-level ESD protection, level shifting and backdrive protection

　　All TMDS lines with integrated rail-to-rail clamping diodes with downstream ESD protection of ±8 kV according to IEC 61000-4-2, level 4 standard

　　Matched 0.5 mm trace spacing

　　Bidirectional level shifting N-channel FETs provided for DDC clock and data channels

　　TMDS lines with ≤ 0.05 pF matching of capacitance between the TMDS pairs

　　Ultra low line capacitance of 0.7 pF per channel

　　HDMI 1.3 compliant

　　Backdrive protection

　　38-pin TSSOP lead-free package

　　IP4776CZ38应用:

　　The IP4776CZ38 is designed for HDMI receiver and transmitter port protection, level

　　shifting and backdrive protection e.g.:

　　TV

　　Graphics card

　　Set-top box

　　DVD

　　Digital media adapter

　　Game console

　　图1.IP4776CZ38功能方框图

　　图2.IP4776CZ38的热插拔,电平转移和背驱保护框图

　　图3.IP4776CZ38 HDMI发送器应用框图

　　图4.IP4776CZ38 HDMI接收器应用框图