SI52112-B4-GM2R

Overview

The SI52112-B4-GM2R 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. Powered by a single 3.3 V supply (2.97 V to 3.63 V), it consumes 17 mA in full active mode. Packaged in a 10-pin TDFN (3x3 mm) in tape and reel format, it supports an extended operating temperature range of –40 °C to +85 °C.

Feature Summary

• PCIe Gen 1 and Gen 2 compliant dual-output clock generation
• -0.5% triangular spread spectrum profile for EMI reduction
• Low power consumption: 17 mA at 3.3 V
• No termination resistors required for HCSL outputs

Applications

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

Procurement Notes

Verify the ordering suffix 'GM2R' corresponds to the 10-pin TDFN package and tape and reel packaging configuration. Confirm that the '-B4' designation matches the requirement for -0.5% spread spectrum functionality, as the non-spread variant uses the '-B3' designation. Ensure the extended temperature grade (-40 to +85 °C) aligns with system thermal requirements.

Selection Notes

Select this component when PCIe Gen 1 or Gen 2 timing is required with integrated spread spectrum capabilities. The B4 variant specifically provides the -0.5% down spread necessary for EMI optimization. For applications requiring higher speeds such as PCIe Gen 3, consider the Si52112-B5/B6 series instead. Verify that the 10-pin TDFN footprint fits the PCB layout constraints.

Part Context

This part belongs to the Si52112-B3/B4 family of tiny clock generators. The 'B4' suffix indicates support for spread spectrum outputs, distinguishing it from the 'B3' model which lacks this feature. The 'GM2R' suffix specifies the 10-pin TDFN package type and tape and reel delivery method.

Replacement Considerations

The Si52112-B3-GM2R serves as a direct pin-compatible replacement if spread spectrum functionality is not required. For PCIe Gen 3 applications, the Si52112-B5 or Si52112-B6 series are recommended alternatives.