HD3SS3412A 4-channel high-performance differential switch | TI.com


4-channel high-performance differential switch



The HD3SS3412A device is a high-speed passive switch capable of switching four differential channels, including applications such as two full PCI Express x1 lanes from one source to one of two target locations in a PC or server application. With its bidirectional capability, the HD3SS3412A also supports applications that allow connections between one target and two source devices, such as a shared peripheral between two platforms. The HD3SS3412A has a single control line (SEL pin) which can be used to control the signal path between Port A and either Port B or Port C.

The HD3SS3412A is offered in an industry standard 42-pin WQFN package available in a common footprint shared by several other vendors. The device is specified to operate from a single supply voltage of 3.3 V over the full temperature range of 0°C to 70ºC.

The HD3SS3412A is a generic 4-CH high-speed MUX/de-MUX type of switch that can be used for routing high-speed signals between two different locations on a circuit board. Although it was designed specifically to address PCI Express Gen III applications, the HD3SS3412A will also support several other high-speed data protocols with a differential amplitude of <1800 mVpp and a common-mode voltage of < 2.0 V, as with USB 3.0 and DisplayPort 1.2. The device’s one select input (SEL) pin can easily be controlled by an available GPIO pin within a system or from a microcontroller.


  • Compatible With Multiple Interface Standards Operating up to 12 Gbps Including PCI Express Gen III and USB 3.0
  • Wide –3-dB Differential BW of Over 8 GHz
  • Excellent Dynamic Characteristics (at 4 GHz)
    • Crosstalk = –35 dB
    • Off Isolation = –19 dB
    • Insertion Loss = –1.5 dB
    • Return Loss = –11 dB
  • Bidirectional "MUX/De-MUX" Type Differential Switch
  • VDD Operating Range 3.3 V ±10%
  • Small 3.5-mm × 9.0-mm, 42-Pin WQFN Package
  • Common Industry Standard Pinout
  • Supports XAUI and SGMII

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Parametrics Compare all products in Retimers, redrivers & switches/muxes

Device type
Number of channels (#)
IN SigCon
OUT SigCon
Speed (Max) (Gbps)
SupplyVoltage (Volt)
Operating temperature range (C)
Package Group
HD3SS3412A HD3SS3411 HD3SS3411-Q1 HD3SS3412 HD3SS3415
Passive switch     Passive switch     Passive switch     Passive switch     Passive switch    
4     1     1     4     4    
PCIe, SAS, SATA, USB 3.1     PCIe, LVDS, USB 3.1     FPD Link, PCIe, LVDS, USB 3.1     PCIe, SAS, SATA, USB 3.1     PCIe, SAS, SATA, USB 3.1    
No     No     No     No     No    
No     No     No     No     No    
12     10     10     12     12    
3.3     3.3     3.3     3.3     3.3    
PCI/PCIe     PCI/PCIe     PCI/PCIe     PCI/PCIe     PCI/PCIe    
0 to 70     -40 to 105     -40 to 105     0 to 70     0 to 70    
WQFN | 42     WQFN | 14     VQFN | 14
WQFN | 14    
WQFN | 42     WQFN | 42