SI52204-A02AGM

Overview

The Si52204-A02AGM 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, frequency selection (100/133/200 MHz), and spread spectrum configuration.

Feature Summary

• Four differential LP-HCSL outputs compliant with PCIe Gen 1/2/3/4/5/6/7 common clock and SRIS architectures
• Integrated 85 Ω internal termination eliminating external line matching resistors
• Triangular spread-spectrum support with selectable down-spread levels of 0.25% or 0.5%
• Low jitter performance with a maximum RMS value of 0.085 ps

Applications

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

Procurement Notes

Verify the specific A02AGM ordering suffix against the manufacturer's current documentation to confirm pinout compatibility and electrical parameters. Confirm RoHS compliance status and check for any Product Change Notifications (PCN) that may affect lead frame materials or manufacturing locations prior to procurement.

Selection Notes

Select this component when a compact solution for up to four PCIe differential clocks is required. Ensure the design utilizes the 32-pin QFN package dimensions (5 x 5 mm). Verify that the application requires the specific 85 Ω internal termination provided by this variant rather than the alternative 100 Ω option available in the family.

Part Context

This part belongs to the Si522xx family, which includes the Si52212 (12 outputs), Si52208 (8 outputs), and Si52202 (2 outputs). All members share similar architectural features but differ in output count and package size. The Si52204 specifically targets designs requiring four differential clock lanes within a small footprint.

Replacement Considerations

Direct replacements within the same family include the Si52208 for higher port counts or the Si52202 for reduced requirements. Cross-family substitution requires verification of voltage domains and output driver types.