SI52208-A02AGMR

Overview

The Skyworks SI52208-A02AGMR is an eight-output PCI Express clock generator supporting Gen 1 through Gen 7 specifications. It provides eight 100 MHz differential LP-HCSL outputs and one 25 MHz LVCMOS reference clock, operating within a 1.5 V to 1.8 V supply range. The device features individual hardware control pins and I²C interfaces for output enable, spread spectrum configuration, and frequency selection (100 MHz, 133 MHz, or 200 MHz). It includes internal 100 Ω or 85 Ω line matching and supports triangular spread-spectrum modulation of 0.25% or 0.5% for EMI reduction. The component operates across an extended temperature range of –40 °C to 85 °C.

Feature Summary

• Eight differential PCIe clock outputs compliant with Gen 1/2/3/4/5/6/7 common clock and SRIS architectures
• Low jitter performance of 0.085 ps RMS maximum to meet PCIe Gen 6 specifications
• Integrated LP-HCSL drivers with selectable internal 100 Ω or 85 Ω impedance matching
• Flexible control via dedicated hardware pins or I²C interface with read-back capabilities

Applications

• Servers and storage systems
• Data center infrastructure
• PCIe add-on cards and Network Interface Cards (NICs)
• Graphics adapter cards

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and tape/reel specifications. Ensure compatibility with system power sequencing requirements, particularly regarding the PWRGD/PWRDNb pin behavior during power-up states.

Selection Notes

Select this model when eight differential clock outputs are required for high-speed PCIe interconnects. Confirm that the target application utilizes LP-HCSL compatible receivers. Verify that the board design accommodates the 48-pin QFN (6 x 6 mm) footprint and thermal requirements associated with the junction-to-ambient resistance values.

Part Context

This component belongs to the Si522xx family, which includes the Si52212 (12 outputs), Si52204 (4 outputs), and Si52202 (2 outputs). All members share similar architectural features but differ in output count and physical package size, ranging from 20-pin to 64-pin QFN configurations.

Replacement Considerations

Direct replacements within the same family include the Si52212 for higher port counts or the Si52204 for reduced output requirements. Cross-family substitution requires verification of voltage levels, pinout compatibility, and jitter specifications.