Output PCI-Express Gen 1/2/3/4 and SRIS Clock Generator

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Lead Time 35 weeks
RoHS Status:
Unit Price:$4.43
Minumum Qty: 1
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The Si522xx is the industry's highest performance and lowest power PCI Express clock generator family for 1.5–1.8 V PCIe Gen1/2/3/4 and SRIS applications.

The Si52212 can source twelve 100 MHz PCIe differential clock outputs, plus one 25 MHz LVCMOS reference clock output. All differential clock outputs are compliant to PCIe Gen1/2/3/4 common clock and separate reference clock architectures specifications.

The Si522xx features individual hardware control pins for enabling and disabling each output, spread spectrum enable/disable for EMI reduction, and frequency select to select 133 MHz or 200 MHz differential output frequencies. These features can also be controlled via I²C.

The small footprint and low power consumption make this family of PCIe clock generators ideal for industrial and consumer applications.

• Servers
• Storage
• Data Centers
• PCIe Add-on Cards
• Network Interface Cards (NIC)
• Graphics Adapter Cards
• Multi-function Printers
• Digital Single-Lens Reflex (DSLR) Cameras
• Digital Still Cameras
• Digital Video Cameras
• Docking Stations

Symmetry Electronics is an authorized Silicon Labs distributor.


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12/8/4/2-output low-power, push-pull HCSL compatible PCI-Express Gen 1, Gen 2, Gen 3, Gen 4 and SRIS-compliant outputs
Low jitter: 0.4 ps max
Individual hardware control pins and IC controls for Output Enable, Spread Spectrum Enable and Frequency Select
Triangular spread spectrum for EMI reduction, down spread 0.25% or 0.5%
Internal 100 O or 85 O line matching
Adjustable output slew rate
Power down (PWRDNb) function supports Wake-on LAN (except Si52202)
One non-spread, LVMCOS reference clock output (except Si52202)
Frequency Select to select 133 MHz or 200 MHz (except Si52202)
25 MHz crystal input or clock input
IC support with readback capabilities
Extended temperature: 40 to 85 C
1.51.8 V power supply, with separate VDD and VDD_IO
Small QFN packages
Pb-free, RoHS-6 compliant

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