SI52112-B3-GTR

Overview

The SI52112-B3-GTR 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. The device operates on a 3.3 V supply with a typical current of 17 mA. Key electrical parameters include an output frequency of 100 MHz, cycle-to-cycle jitter of 70 ps maximum, and long-term accuracy of 250 ppm. It lacks spread spectrum capabilities and supports an extended operating temperature range from -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 clock input without requiring termination resistors
• Low power consumption with 17 mA typical operating current at 3.3 V
• Extended industrial temperature range (-40 °C to +85 °C)
• No spread spectrum functionality (distinct from the B4 variant)

Applications

• Network Attached Storage (NAS) systems
• Multi-function printers
• Wireless access points
• Routers

Procurement Notes

Verify the ordering suffix 'GTR' confirms the 8-pin TSSOP package and tape-and-reel delivery format. Confirm that the 'B3' designation indicates the absence of spread spectrum features, which differs from the 'B4' model. Ensure the application design accommodates the specific thermal dissipation characteristics of the TSSOP package within the required operating environment.

Selection Notes

Select this component when PCIe Gen 1 or Gen 2 timing is required without spread spectrum modulation. The B3 variant is suitable for designs where EMI reduction via spreading is not a primary constraint. Compare against the B4 series if triangular spread spectrum support is necessary. Verify that the 8-pin TSSOP footprint aligns with the PCB layout constraints compared to the 10-pin TDFN option.

Part Context

This part belongs to the Si52112-B3/B4 family of high-performance PCIe clock generators. The 'B3' suffix specifically denotes the non-spread spectrum version, while 'B4' includes 0.5% down spread capability. The 'GTR' suffix identifies the specific 8-pin TSSOP package configuration supplied in a tape-and-reel format for automated assembly processes.

Replacement Considerations

Publicly confirmed substitutes include other members of the Si52112 family such as the SI52112-B4-GTR for spread spectrum requirements, or the SI52112-A2-GTR for legacy compatibility. Verify pinout and electrical specifications before substituting with different package types like the 10-pin TDFN variants.