1.简述 龙迅Lontium LT8631UX HDMI2.0 / 1.4开关具有符合HDMI2.0 / 1.4规格的3：1开关，最大6Gbps高速数据速率，自适应均衡RX输入和预加重TX输出，以支持长电缆应用，板上没有XTAL以节省BOM成本。 LT8631UX HDMI2.0 / 1.4开关自动检测电缆损耗，并自适应优化均衡设置。它支持RX终端电阻校准，以进一步改善信号完整性。 LT8631UX支持符合HDMI2.0 / 1.4规范的DDC / SCDC。集成的DDC和HPD交换机进一步降低了系统制造成本，并简化了系统板上的布线。此封装为QFN64。它的工作温度范围为−40°C至+ 85°C。 2.功能 •3输入，1输出HDMI / DVIlinks •兼容HDMI 1.4 / 2.0 / DVI 1.0 •支持最高6Gbps的数据速率 •RX侧ODT和管理电路 •集成的HPD开关，DDC开关和+ 5V电源指示器开关，大大降低了成本并简化了制造过程 •信号源/接收器连接检测，可实现灵活的系统管理 •支持I2C控制 •低抖动添加 •5V耐压DDC接口 •无需外部晶体 •自适应均衡 •SCDC监视器 3.应用 •用于高级电视机（HDTV）的前面板缓冲器 •独立切换台 •多输入显示 •投影仪
1. Description
The Lontium LT8631UX HDMI2.0/1.4 Switch features a 3:1 switch compliant to HDMI2.0/1.4 specification, max 6Gbps high speed data rate, adaptive equalization RX input and pre-emphasized TX output to support long cable application, no XTAL on board to save BOM cost . LT8631UX HDMI2.0/1.4 Switch automatically detectsthe cable loss, and adaptively optimize the equalization setting. It supports RX termination resistor calibration to further improve signal integrity. LT8631UX support DDC/SCDC compliant to HDMI2.0/1.4 specification. The integrated DDC and HPD switches further lower the cost of system manufacture, and simplify the routing on the system board.This package is QFN64. It operate from −40°C to +85°C. 2. Features • 3 inputs, 1output HDMI/DVIlinks • HDMI 1.4/2.0/DVI 1.0compliant • Supports data rates up to 6Gbps • RX side ODTs and management circuitry • Integrated HPD switch, DDC switch, and +5V Power indicator switch, greatly lowering the cost and simplifying the manufacturing process • Source/Sink connection detection for flexible system management • I2C control supported • Low added jitter • 5V-tolerant DDC interfaces • No external crystal is needed • Adaptive equalization • SCDC monitor 3. Application • Front panel buffer for advanced television (HDTV) sets • Standalone switcher • Multiple input displays • Projectors • A/V receivers
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