SI52112-B3-GM2

Overview

The SI52112-B3-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 functions within a supply voltage range of 2.97 V to 3.63 V (typical 3.3 V) with an active current draw of 17 mA. It utilizes a 10-pin TDFN package measuring 3x3 mm and supports an extended operating temperature range of -40 °C to +85 °C.

Feature Summary

• Dual differential HCSL outputs compliant with PCIe Gen 1 and Gen 2 specifications
• Supports 25 MHz crystal or external clock input without requiring termination resistors
• Low power consumption with 17 mA typical active current
• Compact 10-pin TDFN (3x3 mm) surface-mount package

Applications

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

Procurement Notes

Verify the specific ordering suffix 'GM2' corresponds to the 10-pin TDFN package configuration. Confirm that the non-spread spectrum variant meets system EMI requirements, as the B4 series provides spread spectrum options if needed. Ensure compatibility with the required 3.3 V power domain and thermal dissipation limits for the target application environment.

Selection Notes

Select this component when PCIe Gen 1/Gen 2 timing is required without spread spectrum modulation. Compare against the SI52112-B4-GM2 if EMI reduction via triangular spread spectrum is necessary. Verify that the 10-pin TDFN footprint fits the PCB layout constraints compared to the 8-pin TSSOP alternative.

Part Context

This part belongs to the Si52112-B3/B4 family of high-performance PCIe clock generators. The B3 designation specifically indicates the absence of spread spectrum capabilities, distinguishing it from the B4 variant which supports 0.5% down spread. These devices are engineered for consumer and embedded applications requiring small footprints and low power.

Replacement Considerations

Skyworks recommends the SI52112-B6-GT as a replacement for discontinued parts in this category. However, the B6 series targets PCIe Gen 3 applications and differs in performance characteristics. Direct substitution requires verifying signal integrity and compliance with the newer generation standards.