SI52112-B4-GT

Overview

The SI52112-B4-GT is a dual-output PCIe clock generator from Skyworks Solutions, designed for PCI-Express Gen 1 and Gen 2 compliance. It sources two differential HCSL clocks from a 25 MHz crystal or clock input, operating at a maximum frequency of 100 MHz. The device features a triangular spread spectrum profile with a -0.5% down spread range to reduce EMI. It operates on a 3.3 V supply with an extended temperature range of –40 °C to +85 °C. The component is housed in an 8-pin TSSOP package.

Feature Summary

• PCIe Gen 1 and Gen 2 compliant dual-output clock generation
• Triangular spread spectrum support with 0.5% down spread
• Low power consumption with 17 mA typical operating current
• No termination resistors required for HCSL outputs

Applications

• Network Attached Storage (NAS)
• Multi-function Printers
• Wireless Access Points
• Routers

Procurement Notes

Verify the specific ordering suffix 'GT' corresponds to the 8-pin TSSOP package configuration. Confirm that the B4 variant is selected when spread spectrum functionality is required, as opposed to the non-spectrum B3 version. Ensure the extended temperature grade matches the operational environment requirements.

Selection Notes

Select this model over the B3 variant if electromagnetic interference reduction via spread spectrum is necessary. For applications requiring higher speeds such as PCIe Gen 3, consider the Si52112-B5/B6 series instead. Verify that the 8-pin TSSOP footprint aligns with the PCB layout constraints compared to the available 10-pin TDFN options.

Part Context

This part belongs to the Si52112-B3/B4 family of Tiny Clock generators. The B4 designation specifically indicates the inclusion of spread spectrum capabilities, distinguishing it from the B3 which lacks this feature. Both variants share identical electrical specifications and pinouts, differing only in their internal modulation settings.

Replacement Considerations

The Si52112-B3-GT serves as a direct functional substitute if spread spectrum is not needed. For designs requiring PCIe Gen 3 support, the Si52112-B5/GM2 or B6/GM3 are recommended replacements.