SI52112-B4-GTR

Overview

The SI52112-B4-GTR 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 frequencies up to 100 MHz with a supply voltage of 3.3 V (range 2.97 V to 3.63 V). The device features low power consumption (17 mA typical) and supports triangular spread spectrum modulation (-0.5% down spread) for EMI reduction. It is housed in an 8-pin TSSOP package and operates within an ambient temperature range of –40 °C to +85 °C.

Feature Summary

• PCIe Gen 1 and Gen 2 compliant dual-output clock generation
• Supports 0.5% triangular spread spectrum profile for EMI reduction
• Low power HCSL differential outputs requiring no termination resistors
• Operates on a single 3.3 V supply with 17 mA typical current draw

Applications

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

Procurement Notes

Verify the ordering suffix 'GTR' corresponds to the 8-pin TSSOP package and tape-and-reel configuration as specified in the official Skyworks ordering guide. Confirm that the specific revision level matches the design requirements, noting that product information is subject to change without notice. Ensure compatibility with the required 25 MHz input source and check for any recent discontinuance notices.

Selection Notes

Select the SI52112-B4 variant specifically when spread spectrum functionality is required; the B3 version does not support this feature. For applications needing PCIe Gen 3 support, consider the Si52112-B5/B6 series instead. Ensure the PCB layout accommodates the 8-pin TSSOP footprint and provides adequate decoupling capacitance near the VDD pins as recommended in the design guidelines.

Part Context

This component belongs to the Si52112-Bx family of Tiny Clock PCIe clock generators. The '-B4' designation indicates the inclusion of -0.5% spread spectrum capabilities, distinguishing it from the non-spectrum B3 model. The '-GTR' suffix identifies the specific 8-pin TSSOP package type and tape-and-reel shipping format.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.