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参数

Function USB2 USB speed (Mbps) 12 Supply voltage (V) 3.3 Rating Catalog Operating temperature range (C) 0 to 70 open-in-new 查找其它 USB 集线器和控制器

封装|引脚|尺寸

LQFP (PT) 48 81 mm² 9 x 9 open-in-new 查找其它 USB 集线器和控制器

特性

  • Fully Compliant With the USB Specification as a
    Full-Speed Hub: TID #20240226
  • Integrated USB Transceivers
  • 3.3-V Low-Power ASIC Logic
  • Two Power Source Modes
    • Self-Powered Mode Supporting Seven
      Downstream Ports
    • Bus-Powered Mode Supporting Four
      Downstream Ports
  • All Downstream Ports Support Full-Speed and
    Low-Speed Operations
  • Power Switching and Overcurrent Reporting Is
    Provided Ganged or Per Port
  • Supports Suspend and Resume Operations
  • Suspend Status Pin Available for External Logic
    Power Down
  • Supports Custom Vendor ID and Product ID With
    External Serial EEPROM
  • 3-State EEPROM Interface Allows EEPROM
    Sharing
  • Push-Pull Outputs for PWRON Eliminate the Need
    for External Pullup Resistors
  • Noise Filtering on OVRCUR Provides Immunity to
    Voltage Spikes
  • Supports 6-MHz Operation Through a Crystal
    Input or a 48-MHz Input Clock
  • New Functional Pins Introduced to Reduce the
    Board Material Cost
    • 3 LED Indicator Control Outputs Enable
      Visualized Monitoring of 6 Different Hub/Port
      Status (HUBCFG, PORTPWR, PORTDIS)
    • Output Pin Available to Disable External Pullup
      Resistor on DP0 for 15 ms After Reset or After
      Change on BUSPWR and Enable Easy
      Implementation of Onboard Bus/Self-Power
      Dynamic Switching Circuitry
  • No Special Driver Requirements; Works
    Seamlessly With Any Operating System With USB
    Stack Support
  • Available in 48-Pin LQFP Package
  • JEDEC Descriptor S–PQFP–G for Low-Profile
    Quad Flatpack (LQFP).
open-in-new 查找其它 USB 集线器和控制器

描述

The TUSB2077A hub is a 3.3-V CMOS device that provides up to seven downstream ports in compliance with the USB 2.0 specification. Because this device is implemented with a digital state machine instead of a microcontroller, no software programming is required. Fully compliant USB transceivers are integrated into the ASIC for all upstream and downstream ports. The downstream ports support full-speed and low-speed devices by automatically setting the slew rate according to the speed of the device attached to the ports. The configuration of the BUSPWR terminal selects either the bus-powered or self-powered mode. The introduction of the DP0 pull-up resistor disable terminal, DP0PUR, makes it much easier to implement an onboard bus/self-power dynamic-switching circuitry. The three-LED indicator control output pins also enable the implementation of visualized status monitoring of the hub and its downstream ports. With these new function pins, the end equipment vendor can considerably reduce the total board cost while adding additional product value.

The EXTMEM pin (pin 47) enables or disables the optional EEPROM interface. When EXTMEM is high, the vendor and product IDs (VID and PID) use defaults, such that the message displayed during enumeration is General Purpose USB Hub.

The TUSB2077A supports bus-powered and self-powered modes. External power-management devices, such as the TPS2044, are required to control the 5-V power source switching (on/off) to the downstream ports and to detect an overcurrent condition from the downstream ports individually or ganged. An individually port power controlled hub switches power on or off to each downstream port as requested by the USB host. Also when an individually port power controlled hub senses an overcurrent event, only power to the affected downstream port will be switched off. A ganged hub switches on power to all its downstream ports when power must be on for any port. The power to the downstream ports is not switched off unless all ports are in a state that allows power to be removed. Also, when a ganged hub senses an overcurrent event, power to all downstream ports will be switched off.

open-in-new 查找其它 USB 集线器和控制器
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技术文档

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类型 标题 下载最新的英文版本 发布
* 数据表 TUSB2077A 7-Port Hub for the Universal Serial Bus With Optional Serial EEPROM Interface 数据表 2014年 8月 31日
* 勘误表 TUSB2077A Errata 2006年 10月 3日
用户指南 New EVM User Guide 2013年 12月 3日
应用手册 USB 1.1 / USB 2.0 Hub FAQ 2011年 3月 4日

设计与开发

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设计工具和仿真

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除了一个完整的预加载模型库之外,您还可以在 PSPICE-FOR-TI 工具中轻松访问 TI 器件的全新技术资料。在您确认找到适合您应用的器件后,可访问 TI store 购买产品。 

借助 PSpice for TI,您可使用合适的工具来满足您在整个设计周期(从电路探索到设计开发和验证)的仿真需求。免费获取、轻松入门。立即下载 PSpice 设计和仿真套件,开始您的设计。

入门

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  2. 下载并安装
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特性
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  • 带有一套数字模型的预装库可在最坏情形下进行时序分析
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    • Monte Carlo 分析
    • 最坏情形分析
    • 热分析
仿真工具 下载
document-generic 用户指南 document-generic 下载英文版本 (Rev.A)

CAD/CAE 符号

封装 引脚 下载
LQFP (PT) 48 了解详情

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