SI5335D-B04950-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5335D-B04950-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 technology, ensuring 0 ppm frequency synthesis error. The device supports three independent pin-selectable configurations and features flexible input references including external crystals (25/27 MHz), CMOS, SSTL/HSTL, and differential inputs. Outputs are configurable as LVPECL, LVDS, CML, HCSL, CMOS, or SSTL/HSTL with independent voltage levels of 1.5, 1.8, 2.5, or 3.3 V. It operates on a single core supply of 1.8, 2.5, or 3.3 V within an ambient temperature range of –40 to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four output banks supporting any combination of differential pairs or single-ended outputs
• Zero ppm frequency synthesis error across all configurations
• Three independent, user-assignable, pin-selectable device configurations
• Two selectable PLL loop bandwidths: 1.6 MHz or 475 kHz

Clock Generators, PLLs, Frequency Synthesizers Applications

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory configuration encoded in the B04950 suffix against the system requirements. Confirm that the required input reference type and output formats match the pre-programmed settings. Ensure the PCB land pattern accommodates the 4x4 mm 24-QFN package dimensions and thermal pad requirements specified in the datasheet.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when multiple distinct clock frequencies are needed from a single source without integer relationships. Choose between the 1.6 MHz or 475 kHz loop bandwidth based on whether jitter attenuation for PCIe or DSL applications is required. Verify that the available control pins (P1, P2, P3, P5, P6) can be assigned to the necessary functions such as spread spectrum enable or frequency plan selection.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5335 family of highly flexible clock generators. Unlike fixed-frequency oscillators, it allows for custom frequency plans via the ClockBuilder Pro utility. The 'D' variant typically denotes specific performance characteristics or packaging options within the broader Si5335 product line, designed to replace multiple discrete clock components.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.