SI52111-B3-GM2

Overview

The SI52111-B3-GM2 is a single-output PCIe clock generator from Skyworks Solutions, designed for PCI-Express Gen 1 and Gen 2 compliance. It sources one differential HCSL output at up to 100 MHz from a 25 MHz crystal or clock input. The device operates on a 3.3 V supply with a maximum current of 13 mA. Key electrical parameters include a cycle-to-cycle jitter of 70 ps (max) and long-term accuracy of 250 ppm. It utilizes a 10-pin TDFN package measuring 3x3 mm and supports an extended operating temperature range of -40 °C to +85 °C.

Feature Summary

• PCIe Gen 1 and Gen 2 compliant single-output clock generation
• Low power HCSL differential output buffer requiring no termination resistors
• Supports Serial-ATA (SATA) operation at 100 MHz
• Accepts 25 MHz crystal or clock input without spread spectrum capability

Applications

• Network Attached Storage
• Multi-function Printer
• Wireless Access Point
• Routers

Procurement Notes

Verify the specific ordering suffix 'GM2' corresponds to the 10-pin TDFN package configuration in official Skyworks documentation. Confirm that the non-spread spectrum variant meets system EMI requirements, as the B4 revision provides 0.5% down spread options if needed.

Selection Notes

Select this component when a single differential PCIe clock output is required for Gen 1 or Gen 2 interfaces. Ensure the design accommodates a 25 MHz reference source. For applications requiring spread spectrum modulation, consider the Si52111-B4 series instead.

Part Context

This part belongs to the Si52111-B3/B4 family of high-performance PCIe clock generators. The B3 variant specifically lacks spread spectrum features, distinguishing it from the B4 model which supports 0.5% down spread outputs for enhanced EMI reduction.

Replacement Considerations

Si52111-B4-GM2: Provides identical functionality but adds 0.5% spread spectrum support.

FAQ

Does the SI52111-B3-GM2 support spread spectrum?

No, the Si52111-B3 does not support spread spectrum outputs. Spread spectrum functionality is available only in the Si52111-B4 variant.

What is the maximum output frequency?

The maximum output frequency is 100 MHz, which complies with PCIe Gen 1 and Gen 2 specifications.

Is termination resistance required for the output?

No, the device features a low power HCSL differential output buffer that does not require external termination resistors.