Description

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.

Features:

• 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