Si52212/Si52208/Si52204/Si52202 Data
Sheet
12/8/4/2-Output PCI-Express Gen 1/2/3/4 and SRIS Clock
Generator
KEY FEATURES OR KEY POINTS
• 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
The Si52212/08/04/02 are the industry's highest performance and lowest power PCI Ex-
press clock generator family for 1.5–1.8 V PCIe Gen1/2/3/4 and SRIS applications. The
Si52212, Si52208, and Si52204 can source twelve, eight, and four 100 MHz PCIe differ-
ential clock outputs, respectively, plus one 25 MHz LVCMOS reference clock output.
The Si52202 can source two 100 MHz PCIe clock outputs only. All differential clock out-
puts are compliant to PCIe Gen1/2/3/4 common clock and separate reference clock ar-
chitectures specifications.
• Low jitter: 0.4 ps max
2
•
Individual hardware control pins and I C
controls for Output Enable, Spread
Spectrum Enable and Frequency Select
• Triangular spread spectrum for EMI
reduction, down spread 0.25% or 0.5%
The Si52212/08/04/02 feature individual hardware control pins for enabling and disa-
bling each output, spread spectrum enable/disable for EMI reduction, and frequency se-
lect to select 133 MHz or 200 MHz differential output frequencies. These features can
also be controlled via I2C.
• Internal 100 Ω or 85 Ω line matching
• Adjustable output slew rate
• Power down (PWRDNb) function supports
Wake-on LAN (except Si52202)
The small footprint and low power consumption make this family of PCIe clock genera-
tors ideal for industrial and consumer applications.
• One non-spread, LVMCOS reference clock
output (except Si52202)
• Frequency Select to select 133 MHz or
200 MHz (except Si52202)
For more information about PCI-Express, Silicon Labs' complete PCIe portfolio, applica-
tion notes, and design tools, including the Silicon Labs PCIe Clock Jitter Tool for PCI-
Express compliance, please visit the Silicon Labs PCI Express Learning Center.
• 25 MHz crystal input or clock input
2
•
I C support with readback capabilities
Applications
• Extended temperature: –40 to 85 °C
• Servers
• 1.5–1.8 V power supply, with separate
VDD and VDD_IO
• Storage
• Data Centers
• Small QFN packages
• 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
• Pb-free, RoHS-6 compliant
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This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Preliminary Rev. 0.7