DockPort Controller and Switch - HD3SS2521


DockPort Controller and Switch


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 .


  • 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

View more

Parametrics Compare all products in Dockport

Vcc range (V)
SuperSpeed USB I/O Voltage (V)
USB 2.0 I/O Voltage (V)
Data Rate (Gbps)
Active ICC (mA)
Approx. Price (US$)
Operating Temperature Range (C)
3.3 ± 10%    
0 - 2.2    
Up to 3.6    
1.85 | 1ku    
0 to 70    
56-pin WQFN Package (RHU)    

Related end equipment

  • Desktop PCs
  • Notebook PCs
  • Tablets
  • Docking Station

Related products

Part # Name Product Family Comments
SN75DP130   DisplayPort Redriver Supporting RBR, HBR, and HBR2 (5.4Gbps)   Display & Imaging SerDes - DisplayPort    DisplayPort Redriver supporting DP1.2a and eDP1.3. Works with HD3SS2521 to extend DisplayPort drive capability.  
SN75DP126   DisplayPort 1:2 Re-Driver Switch with DisplayPort and TMDS Translator Outputs   Display & Imaging SerDes - DisplayPort    DP++ redriver & 1:2 switch w/ TMDS translation. Provides ability to support DisplayPort and HDMI/DVI from one source.  
SN75DP139   DisplayPort to TMDS Translator   Display & Imaging SerDes - DisplayPort    Provides TMDS/DVI/HDMI output from Displayport input.  
HD3SS212   5.4Gbps DisplayPort 1.2 2-to-1 Differential Switch   SWITCHES AND MULTIPLEXERS - HDMI/LAN/VGA/DDR/Video Switch    2:1 DisplayPort switch to add additional inputs.  
TUSB8040A   2nd Generation Four Port SuperSpeed USB (USB 3.0) Hub   USB - USB HUB CONTROLLER    4-port USB3.0 Hub Controller increases the number of available USB SuperSpeed ports.  
HD3SS3412   4 Channel Differential Switch   PCI EXPRESS - PCIe Signal Switch    4:8 Differential input switch to provides IO flexibility  
Click Here