• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

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 both 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 pullup resistor disable terminal, DP0PUR, makes it much easier to implement an onboard bus/self-power dynamic-switching circuitry.

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 Terminal 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 Terminals 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 Terminal 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
• Available in 48-Terminal LQFP PackageJEDEC descriptor S−PQFP−G for low-profile quad flatpack (LQFP).