Product details


Type Passive switch USB speed (Mbps) 5000 Configuration 2:1 Rating Catalog Operating temperature range (C) 0 to 70 ESD HBM (Typ) (kV) 2 open-in-new Find other USB redrivers & multiplexers

Package | Pins | Size

WQFN (RHU) 56 55 mm² 11 x 5 open-in-new Find other USB redrivers & multiplexers


  • Ideal for DockPort Applications
    • Bi-Directional 2:1 Switch for USB 2.0 (HS/FS/LS) and HPD Signals
    • Bi-Directional 2:1 Switch for SuperSpeed USB and DisplayPort Signals
    • Integrated DockPort Controller Manages DockPort Detection,
      Signal Switching and Power Switching
  • Supports Host- and Dock-side Applications
  • VCC Operating Range 3.3V ± 10%
  • SuperSpeed USB I/O Supports Common Mode Voltage from 0V to 2.2V
  • USB 2.0 I/O Supports Signal Up to 3.6V
  • Wide –3dB Differential BW on High-bandwidth Path of over 6 GHz
  • Excellent High-bandwidth Path Dynamic Characteristics on (at 2.5GHz)
    • Crosstalk = –39dB
    • Isolation = –22dB
    • Insertion Loss = –1.2dB
    • Return Loss = 12 dB
    • Max Bit-Bit Skew = 8 ps
  • 5mm x11mm, 56-Pin WQFN Package (RHU)
  • ESD
    • HBM: 2000V
    • CDM: 500V
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The HD3SS2521 is an integrated DockPort switch solution. It provides independent 2:1 passive switching for the SuperSpeed USB and Display Port signals as well as for the USB 2.0 (HS/FS/LS) and I2C necessary to support DockPort applications. In addition, a firmware upgradable integrated DockPort controller is provided to manage host and dock side DockPort detection, signal switch and power configuration.

The HD3SS2521 is offered in 56-pin WQFN package and is specified to operate from a single supply voltage of 3.3V over the temperature range of 0°C to 70°C .

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Technical documentation

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Type Title Date
* Datasheet DockPort Controller, HD3SS2521 datasheet (Rev. A) May 09, 2013

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