SI52208-A02AGM

Overview

The Skyworks SI52208-A02AGM is a low-power, eight-output PCI Express clock generator supporting Gen 1 through Gen 7 standards. It provides eight 100 MHz differential LP-HCSL outputs and one 25 MHz LVCMOS reference output. The device operates on a 1.5 V to 1.8 V supply with separate VDD and VDD_IO rails. Key electrical parameters include a maximum RMS jitter of 0.085 ps and support for triangular spread spectrum modulation at 0.25% or 0.5%. It features individual hardware control pins and I2C interfaces for output enable, frequency selection (100/133/200 MHz), and power-down functions.

Feature Summary

• Eight differential LP-HCSL outputs compliant with PCIe Gen 1-7 common clock and SRIS architectures
• Low jitter performance of 0.085 ps (RMS) max, meeting PCIe Gen 6 specifications
• Integrated internal 100 Ω or 85 Ω line matching to eliminate external resistors
• 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 against the manufacturer's current documentation to confirm package type and temperature range. Ensure compatibility with the target board's power sequencing and I2C address configuration before procurement.

Selection Notes

Select this model when eight differential PCIe clock outputs are required in a compact form factor. The 48-pin QFN (6 x 6 mm) package optimizes board space compared to larger pin-count alternatives. Verify that the application requires LP-HCSL drivers and supports the specified 1.5 V to 1.8 V operating voltage range.

Part Context

The SI52208 belongs to the Si522xx family, which includes the Si52212 (12 outputs), Si52204 (4 outputs), and Si52202 (2 outputs). This family shares similar architectural features, including PLL-based generation and spread spectrum capabilities, but differs in output count and physical package size.

Replacement Considerations

Direct replacements within the same family include the Si52212 for higher port counts or the Si52204 for lower port requirements. Cross-family substitution may require significant schematic redesign due to differences in driver types and pin configurations.