SI5335B-B05728-GM

Overview

The SI5335B-B05728-GM is a web-customizable, any-frequency, any-output quad clock generator and buffer manufactured by Skyworks Solutions. It synthesizes four non-integer-related frequencies up to 350 MHz using MultiSynth fractional divider technology, ensuring 0 ppm frequency synthesis error. The device supports flexible input references including external crystals (25/27 MHz), CMOS, SSTL/HSTL, and differential inputs. It features independently configurable output drivers supporting LVPECL, LVDS, CML, HCSL, CMOS, and SSTL/HSTL formats with selectable supply voltages of 1.5, 1.8, 2.5, or 3.3 V. Key electrical parameters include a core supply voltage range of 1.71–3.63 V, operating temperature from –40 to +85 °C, and low phase jitter of 0.7 ps RMS.

Feature Summary

• Supports three independent, pin-selectable device configurations to replace multiple clock ICs.
• Up to five user-assignable control pins for spread spectrum, enable, reset, and frequency plan selection.
• Two selectable PLL loop bandwidths (1.6 MHz or 475 kHz) for jitter attenuation in PCIe and DSL applications.
• Compliant with PCIe Gen 1/2/3/4 common clock and Gen 3 SRNS specifications.

Applications

• PCI Express Gen 1/2/3/4 systems
• Ethernet switch/router clocking
• Processor and FPGA clocking
• DSL jitter attenuation
• Broadcast video/audio timing

Procurement Notes

Verify the specific factory configuration encoded in the ordering suffix B05728 against system requirements. Confirm that the QFN-24 package dimensions and thermal pad grounding meet PCB layout guidelines. Ensure compatibility with the ClockBuilder Pro utility for final validation of the customized frequency plan.

Selection Notes

Select this model when four distinct output frequencies are required with zero ppm synthesis error. Choose between the 1.6 MHz and 475 kHz loop bandwidth settings based on whether jitter attenuation or fast lock time is prioritized. Ensure the input reference source matches the supported formats: crystal, single-ended CMOS/SSTL/HSTL, or differential LVDS/LVPECL/CML.

Part Context

This component belongs to the Si5335 family of highly flexible clock generators. The 'B' variant typically denotes specific performance characteristics within the series, such as the 350 MHz maximum output frequency capability described in the datasheet. The '-GM' suffix indicates a lead-free, halogen-free RoHS-compliant package.

Replacement Considerations

Direct replacements must match the 24-QFN package and support four outputs with similar jitter specifications. Verify that alternative devices support the same MultiSynth-like fractional division technology to maintain 0 ppm frequency accuracy across all outputs.