SI52204-A02BGMR

Overview

The Si52204-A02BGMR is a four-output PCI Express clock generator supporting Gen 1 through Gen 7 specifications. It operates on a 1.5 V to 1.8 V power supply and provides four 100 MHz differential LP-HCSL outputs alongside one 25 MHz LVCMOS reference clock. The device features internal 85 Ω line matching, adjustable output slew rates, and individual hardware or I²C controls for output enablement, spread spectrum (0.25% or 0.5%), and frequency selection (100 MHz, 133 MHz, or 200 MHz). It includes a power-down function supporting Wake-on LAN and operates within an extended temperature range of –40 °C to 85 °C.

Feature Summary

• Four differential PCIe clock outputs compliant with Gen 1/2/3/4/5/6/7 common clock and SRIS architectures
• Internal 85 Ω impedance matching eliminates external resistors
• Triangular spread-spectrum capability for EMI reduction with selectable 0.25% or 0.5% down-spread
• Individual hardware control pins and I²C support for output enable, spread spectrum, and frequency select

Applications

• Servers
• Storage systems
• Data centers
• PCIe add-on cards
• Network Interface Cards (NICs)

Procurement Notes

Verify the specific ordering suffix 'A02B' against the manufacturer's current documentation to confirm pinout, package type, and electrical characteristics. Confirm RoHS compliance status and lead times directly with authorized distributors or Skyworks Solutions, Inc., as availability may vary by region and production cycle.

Selection Notes

Select this component when a compact four-channel PCIe clock solution is required for Gen 1 through Gen 7 applications. Ensure the design accommodates the separate VDD and VDD_IO power supplies (1.05 V to 1.8 V) and utilizes the 32-pin QFN package. Verify that the internal 85 Ω termination matches the PCB trace impedance requirements without additional external components.

Part Context

The Si52204 belongs to the Si522xx family, which includes the Si52212 (12 outputs), Si52208 (8 outputs), and Si52202 (2 outputs). This family shares common architectural features such as low jitter performance and flexible control interfaces, differing primarily in output count and physical package size to suit various integration densities.

Replacement Considerations

For direct functional replacements within the same family, consider the Si52208 for eight outputs or the Si52202 for two outputs, provided the pinout and voltage requirements are compatible. Cross-family substitution requires verification of jitter specifications, output driver types, and control interface compatibility.