SI52111-B5-GT

Overview

The SI52111-B5-GT is a single-output PCIe clock generator from Skyworks Solutions, designed for PCI-Express Gen 1 through Gen 4 common clock applications. It accepts a 25 MHz crystal or clock input and provides one HCSL differential output at up to 100 MHz. The device operates on a 3.3 V supply with a typical current of 13 mA and supports an extended temperature range of –40 °C to +85 °C. Unlike the B6 variant, it does not support spread spectrum modulation. It is housed in an 8-pin TSSOP package.

Feature Summary

• PCIe Gen 1, Gen 2, Gen 3, Gen 3 SRNS, and Gen 4 compliant
• Low power HCSL differential output buffer (13 mA)
• No termination resistors required
• Triangular spread spectrum profile not supported

Applications

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

Procurement Notes

Verify the ordering suffix 'GT' corresponds to the 8-pin TSSOP package configuration. Confirm that the absence of spread spectrum functionality aligns with system EMI requirements, as this model lacks the modulation features found in the B6 series.

Selection Notes

Select the SI52111-B5-GT when a non-spread spectrum PCIe clock source is required for Gen 1 through Gen 4 interfaces. Ensure the design accommodates the 8-pin TSSOP footprint and utilizes a 25 MHz crystal or clock input. Verify that the 100 ppm frequency accuracy meets the specific link requirements.

Part Context

This component belongs to the Si52111-B5/B6 family of high-performance PCIe clock generators. The B5 designation specifically indicates the absence of spread spectrum capabilities, distinguishing it from the B6 variant which supports 0.5% down spread. Both share identical electrical specifications and pinouts.

Replacement Considerations

The SI52111-B6-GT serves as a functional substitute if spread spectrum modulation is desired. For legacy compatibility, the SI52111-A2-GT may be considered, though it only supports PCIe Gen 1.