1. 描述
LT84101D 是一款深度优化的 USB 再驱动器 IC，通过分别在 USB3.1 Gen-1 和 USB2.0 规范下执行电缆或电路板走线损耗补偿来增强信号质量。
对于 USB3.1 Gen-1 操作，LT84101D 是一款具有高级电源管理的双端口双向 5 Gb/s 超高速 （SS） 转接驱动器器件。它由双通道SSRX-SSTX对组成。SSRX 实现了多级可编程线性均衡器，支持因码间干扰 （ISI） 引起的最大 25dB 损耗补偿。SSTX 通过多级可编程输出摆幅和高达 6dB 的去加重重新驱动接收信号。每个端口还集成了低频周期信号 （LFPS） 检测、通过远程接收器终端感应和状态机控制的自动插拔。
对于USB2.0操作，它通过USB电缆提供信号传输扩展，支持高速，全速和低速。从芯片到主机或设备的最大扩展长度可达 10m。它消除了USB5.2规范的0米距离限制。可以对用于扩展功能的内部均衡和预加重进行编程。
LT84101D 在内部集成了一个 8 位 OCM 和闪存 （堆叠芯片） 来运行程序。LT84101D 还支持在线软件升级。
LT84101D 采用先进的 CMOS 工艺制造，采用小外形 5mmx5mm QFN40 封装。该封装符合 RoHS 标准，额定工作温度范围为 -40°C 至 +85°C.2
。特点
• 兼容 USB3.1 Gen-1 和 USB2.0 标准
• 支持 2 端口 USB3.1 Gen-1 操作• 支持同时运行两个独立数据传输，每个端口的数据速率为 5Gb/s • 支持 LFPS 检测和接收检测• 支持一个 USB2.0 端口
，数据速率
为 480 Mb/s• 支持 USB2.0 热插拔检测
• 最大 USB2.0
电缆延长长度可达 10 米
• 可编程输入均衡• 可编程输出摆幅和去加重• 用于固件升级的内部 MCU 和闪存
• 支持外部 I2C 调试
• 1.8V/3.3V 双电源
• 封装在 5mmx5mm QFN40
中 3.
应用
• 智能手机、平板电脑和其他移动设备
• 数字电视和数据存储设备• PC、笔记本电脑、一体机和扩展坞
• VR/AR HMD 和 USB3.1 电缆延长器
1. Description
LT84101D is a deeply-optimized USB re-driver IC that enhances signal quality by performing cable or board trace loss compensation under USB3.1 Gen-1 and USB2.0 specification respectively.
For USB3.1 Gen-1operation, LT84101D is a dual-port bi-directional 5 Gb/s SuperSpeed (SS) re-driver device with advanced power management. It is composed of a dual-channel SSRX-SSTX pair. The SSRX implements a multi-level programmable linear equalizer, supporting maximum 25dB loss compensation due to Inter-Symbol Interference (ISI). The SSTX re-drives the received signal with multi-level programmable output swing and up to 6dB de-emphasis. A Low-Frequency Periodic Signal (LFPS) detection, automatic plug and unplug by remote receiver termination sensing and state machine control is also integrated on each port.
For USB2.0 operating, it provides signal transferring extension over USB cable, which supports high speed, full speed and low speed. The maximum extension length can be up to 10m from the chip to host or device. It eliminates the 5m distance limitation of USB2.0 specification. Internal equalization and pre-emphasis used for extension function can be programmed.
LT84101D internally integrates an 8-bit OCM and flash memory (stacked die) to run program. Online software upgrade is also supported for LT84101D.
The LT84101D is fabricated in advanced CMOS process and implemented in a small outline 5mmx5mm QFN40 package. This package is RoHS compliant and specified to operate from -40°C to +85°C.
2. Features
• Compatible with USB3.1 Gen-1 and USB2.0 Standard
• Support 2-Port USB3.1 Gen-1 Operating
• Support Simultaneous Operating of Two Stand-alone Data Transfer with 5Gb/s Data Rate for each Port
• Supports LFPS Detect and Rx Detect
• Support One USB2.0 Port with 480 Mb/s Data Rate
• Support Hot-Plug Detect for USB2.0
• Maximum USB2.0 Cable Extension Length up to 10m
• Programmable Input Equalization
• Programmable Output Swing and De-emphasis
• Internal MCU and Flash for Firmware Upgrade
• Support External I2C Debug
• 1.8V/3.3V Dual Power Supply
• Packaged in 5mmx5mm QFN40
3. Applications
• Smartphone, Tablet and Other Mobile Devices
• Digital TV and Data Storage Equipment
• PC, Notebook, All-in-Ones Computer and Docking
• VR/AR HMD and USB3.1 Cable Extender
