SI52112-B4-GM2

Overview

The SI52112-B4-GM2 is a dual-output PCIe clock generator from Skyworks Solutions, designed for 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 triangular spread spectrum modulation with a -0.5% down-spread range to reduce EMI. It operates on a 3.3 V supply (2.97 V to 3.63 V) with a typical current consumption of 17 mA. Packaged in a compact 10-pin TDFN (3x3 mm), it supports an extended industrial temperature range of –40 °C to +85 °C.

Feature Summary

• PCIe Gen 1 and Gen 2 compliant dual differential outputs
• Integrated triangular spread spectrum (-0.5% down spread)
• Low power HCSL buffers requiring no termination resistors
• Supports 25 MHz crystal or external clock input

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official guide to confirm package type and tape/reel configuration. Confirm that the B4 variant is required for applications needing spread spectrum capabilities, as the B3 variant lacks this feature. Ensure design compatibility with the 10-pin TDFN footprint.

Selection Notes

Select the SI52112-B4-GM2 when spread spectrum modulation is necessary for EMI reduction in PCIe designs. For applications not requiring spread spectrum, consider the SI52112-B3 series. Verify that the 10-pin TDFN package fits the board layout constraints compared to the 8-pin TSSOP alternative.

Part Context

This component belongs to the Si52112 family of high-performance PCIe clock generators. The 'B4' designation specifically indicates support for -0.5% spread spectrum outputs, distinguishing it from the non-spectrum B3 model. It serves as a predecessor to the Si52112-B5/B6 series intended for PCIe Gen 3 applications.

Replacement Considerations

Publicly confirmed substitutes include the SI52112-B3-GM2 (non-spread version) and the SI52112-B4-GT (8-pin TSSOP package). Note that the SI52112-A2 series has been discontinued.