1. 概述
LT8641SXE是一個(gè)最小化轉(zhuǎn)換差分信號（TMDS）開關(guān)，能夠?qū)⒍鄠€(gè)高清多媒體接口（HDMI）源設(shè)備連接到高清電視（HDTV）。LT8641SXE基于HDMI 1.4規(guī)范，是一種高級TMDS開關(guān)，為制造商提供了一種經(jīng)濟(jì)高效的方法，可以在其HDTV中添加其他HDMI端口。多個(gè)HDMI端口允許消費(fèi)者將各種支持HDMI的信號源連接到其HDTV。它支持HDCP 1.4規(guī)格和音頻回傳通道功能。
LT8641SXE是一款四對一（4：1）開關(guān)，非常適合在HDTV和A / V接收器的背面板上使用，從而使消費(fèi)者可以連接多個(gè)具有HDMI功能的設(shè)備，例如高清DVD播放器，機(jī)頂盒。盒和游戲機(jī)。LT8641SXE開關(guān)從四個(gè)接收器端口中選擇一個(gè)HDMI或數(shù)字視頻接口（DVI）信號，并生成HDMI / DVI音頻/視頻輸出以及DDC / HPD切換，完全符合HDMI和DVI規(guī)范。LT8641SXE還用作HDMI接收器。它從HDMI數(shù)據(jù)包中提取數(shù)字音頻信息，并將數(shù)字音頻恢復(fù)到I2S / SPDIF接口。因此可以將其應(yīng)用于多聲道音頻放大器以獲得最佳音頻效果。

2. 2.功能
?4輸入1輸出HDMI2.0鏈路
?兼容HDMI1.4和HDCP1.4 
?HDMI輸入分辨率高達(dá)4Kx2K @ 30Hz 
?HDMI輸出分辨率高達(dá)4Kx2K @ 30Hz 
?音頻輸出支持8通道I2S音頻輸出或6通道I2S和SPDIF都
支持?支持3D格式
?支持CEC 
?支持HDMI鏈接上的一個(gè)通道ARC功能。

3.應(yīng)用圖
?嵌入式電視開關(guān)
?外部HDMI開關(guān)
?數(shù)字音頻放大器

1General Description
The LT8641SXE is a Transition Minimized Differential Signaling (TMDS) switch that enables the connection of multiple High-Definition Multimedia Interface (HDMI) source devices to high-definition television (HDTV). Based on the HDMI 1.4 specification, LT8641SXE is an advanced TMDS switch that delivers a cost-effective method for manufacturers to add additional HDMI ports to their HDTV. Multiple HDMI ports allow consumers to connect variety HDMI-enabled sources to their HDTV. It supports HDCP 1.4 specifications, and Audio Return Channel function.

The LT8641SXE is a four-to-one (4:1) switch ideally suited for use in the back panel of HDTV and A/V receivers, allowing consumers to connect multiple HDMI-enabled devices such as high-definition DVD players, set top boxes and game consoles. The LT8641SXE switch selects a single HDMI or Digital Visual Interface (DVI) signal from the four receiver ports and generates HDMI/DVI audio/video output, as well as DDC/HPD switching, in full compliance with the HDMI and DVI specifications. The LT8641SXE also acts as a HDMI receiver. It extracts the digital audio information from the HDMI packet, and recovers digital audio to I2S/SPDIF interface. So it can be applied to the multi-channel audio amplifier for best audio effect. This feature can enable an external HDMI switching box acts as a home entertainment box that can output up to 8-channel high quality audio signal for the best audio effect.

2. Features
? 4 inputs, 1output HDMI2.0 links
? Compliant with HDMI1.4 and HDCP1.4
? HDMI input resolution up to 4Kx2K@30Hz
? HDMI output resolution up to 4Kx2K@30Hz
? Audio output support 8 channel I2S audio outputs or both 6 channel I2S and SPDIF
? Supports 3D format
? Supports CEC
? Supports one channel ARC function on HDMI link.

3.  Application Diagram
? Embedded TV Switch
? External HDMI Switch
? Digital Audio Amplifier
? Etc.

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