SI52204-A01AGMR

Overview

The Skyworks Si52204-A01AGMR is a four-output PCIe clock generator supporting Gen 1 through Gen 7 specifications. It operates on a 1.5 V to 1.8 V 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 spread spectrum capabilities for EMI reduction. It supports I2C control with readback functionality and individual hardware pins for output enable and frequency selection. The component is housed in a compact 32-pin QFN package.

Feature Summary

• Four differential LP-HCSL outputs compliant with PCIe Gen 1/2/3/4/5/6/7 common clock and SRIS architectures
• Internal 85 Ω impedance matching eliminates external resistors
• Triangular spread-spectrum modulation (0.25% or 0.5%) for EMI reduction
• Low jitter performance of 0.085 ps RMS maximum

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 pinout compatibility and termination requirements. Confirm that the A01 variant matches the required internal termination value for the target design. Check for any product change notifications regarding the RoHS compliance status or manufacturing location updates before finalizing procurement.

Selection Notes

Select this model when four differential PCIe clock outputs are required within a small footprint. Ensure the design utilizes a 1.5 V to 1.8 V power supply range. Verify that the internal 85 Ω termination aligns with the PCB trace impedance requirements. Consider the I2C address configuration via the SA pin if multiple devices share the bus.

Part Context

This component belongs to the Si522xx family, which includes the Si52212 (12 outputs), Si52208 (8 outputs), and Si52202 (2 outputs). All members share similar low-power characteristics and PCIe Gen 1-7 compliance but differ in output count and package size. The Si52204 specifically targets applications needing four outputs in a 32-pin QFN form factor.

Replacement Considerations

Direct replacements within the same family include the Si52208 for higher output counts or the Si52202 for lower counts, provided the pinout and voltage requirements are compatible. Cross-family substitution requires verification of electrical parameters and package dimensions.