1. 概述
LT®8644EX 是一款 16×16 数字交叉点开关，具有 16 个差分 CML 兼容输入和 16 个差分 CML 输出。LT8644EX针对非归零（NRZ）信号进行了优化，每个端口的数据速率高达6 Gbps。每个端口提供可编程输入均衡电平和可编程输出摆幅。LT8644EX 支持通过串行控制接口进行独立通道切换。LT8644EX 具有低延迟和非常低的通道间偏斜。I2C 接口用于控制器件并提供对高级功能的访问。
2. 特点
• 每端口 NRZ 数据速率
250Mbs 至 6Gbps• 可编程接收均衡，以 40Gbps
的速度补偿 4 英寸 FR6• 直流或交流耦合差分 CML 输入• 直流或交流耦合差分 CML 输出
• 可编程 CML 输出电平和预加重电压• 支持输出极换
• 50Ω 片上 I/O 控制• 支持 8b/10b、加扰或未编码 NRZ 数据
• 集成 100/400kHz I2C 从机
• 低功耗• 电源：3.3V 用于 I/O 和 1.2V 用于内核
• ESD 4kV HBM
• 温度范围：-40°C ~ +85°C
• 128 引脚 QFN 14*14 封装
3. 应用
• 光纤网络交换• 数字视频（HDMI、DVI、显示端口）
• 数据存储网络
1. General Description
The LT8644EX is a 16×16 digital crosspoint switch, with 16 differential CML compatible inputs and 16 differential CML outputs. The LT8644EX is optimized for non return-to-zero (NRZ) signaling with data rates of up to 6 Gbps per port. Each port offers programmable level of input equalization and programmable output swing. The LT8644EX supports independent channel switching through the serial control interface. The LT8644EX has low latency and very low channel-to-channel skew. An I2C interface is used to control the device and provide access to advanced features.
2. Features
• 250Mbs to 6Gbps per port NRZ data rate
• Programmable receive equalization, compensates 40 inches of FR4 at 6Gbps
• DC- or AC-coupled differential CML inputs
• DC- or AC-coupled differential CML outputs
• Programmable CML output levels and pre-emphasis leves
• Support output polarity swap
• 50Ω on-chip I/O temination
• Supports 8b/10b, scrambled or uncoded NRZ data
• Integrated 100/400kHz I2C slave
• Low power consumption
• Power supply: 3.3V for I/O and 1.2V for core
• ESD 4kV HBM
• Temperature Range: -40°C ~ +85°C
• 128-pin QFN 14*14 package
3. Applications
• Fiber optic network switching
• Digital video (HDMI, DVI,Display Port)
• Data storage networks
