SI52212-A02AGM

Overview

The Si52212-A02AGM is a high-performance, low-power clock generator designed for PCI Express Gen 1 through Gen 7 and SRIS applications. It provides twelve 100 MHz differential PCIe clock outputs compliant with common clock and separate reference architectures, alongside one 25 MHz LVCMOS reference clock output. The device operates on a single 1.5 V to 1.8 V supply and features individual hardware control pins or I²C interface for enabling/disabling outputs, spread spectrum selection, and frequency configuration. It includes internal 85 Ω line matching termination and supports adjustable slew rates.

Feature Summary

• Twelve 100 MHz LP-HCSL differential outputs plus one 25 MHz LVCMOS reference clock
• Internal 85 Ω impedance matching eliminates external resistors
• Triangular spread-spectrum enable/disable for EMI reduction (0.25% or 0.5%)
• Individual hardware control pins and I²C support for output enable, frequency select, and power down

Applications

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

Procurement Notes

Verify the specific ordering suffix 'AGM' against the manufacturer's current documentation to confirm package type and termination specifications. Ensure that the required internal termination value matches the design requirements, as other variants in the family may offer different termination options.

Selection Notes

Select this component when a high port count of twelve differential clocks is required for PCIe Gen 1 through Gen 7 designs. Verify that the system architecture utilizes either common clock or separate reference modes compatible with the device's output drivers. Confirm that the 85 Ω internal termination aligns with the PCB trace impedance requirements.

Part Context

The Si52212 belongs to the Skyworks Si522xx family, which also includes the Si52208 (8 outputs), Si52204 (4 outputs), and Si52202 (2 outputs). All members share similar functional blocks, including PLL, spread spectrum control, and I²C interfaces, but differ in output count and physical package size.

Replacement Considerations

Direct pin-to-pin replacements within the same family include the Si52208, Si52204, and Si52202, though these offer fewer differential outputs. Designers must account for the reduced channel count when substituting with lower-output variants.