SI5335C-B05939-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5335C-B05939-GMR is a web-customizable, any-frequency, any-output quad clock generator and buffer. It synthesizes four non-integer-related frequencies up to 350 MHz using MultiSynth 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. Outputs are independently configurable for LVPECL, LVDS, CML, HCSL, CMOS, or SSTL/HSTL formats with selectable supply voltages of 1.5, 1.8, 2.5, or 3.3 V. It features low phase jitter of 0.7 ps RMS, two selectable PLL loop bandwidths (1.6 MHz or 475 kHz), and up to five user-assignable control pins for system configuration.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Synthesizes four independent, non-integer-related output frequencies up to 350 MHz with 0 ppm frequency error
• Supports multiple input types: external crystal, CMOS, SSTL/HSTL, and differential clocks
• Configurable output drivers supporting LVPECL, LVDS, CML, HCSL, CMOS, and SSTL/HSTL formats
• Features low phase jitter (0.7 ps RMS typical) and 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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory customization parameters encoded in the B05939 suffix via the official datasheet or Skyworks ClockBuilder Pro utility. Confirm that the GMR suffix indicates tape-and-reel packaging suitable for automated assembly. Ensure compatibility with the target system's voltage levels and signal integrity requirements before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a single device must replace multiple clock generators or buffers with varying frequency and format requirements. Use the ClockBuilder Pro tool to define the exact frequency plan and pin configurations. Verify that the required output drive strengths and voltage levels (1.5V–3.3V) match the load specifications of the destination devices.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5335 family of highly flexible clock generators. The 'C' variant typically denotes specific electrical or package characteristics within the series, while the alphanumeric suffix defines the custom frequency plan and pinout configuration generated by Skyworks Solutions.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct pin-to-pin replacements may exist within the Si5335 family (e.g., Si5335A, Si5335B) if they share the same 24-QFN package and core functionality. However, substitution requires re-verification of the custom frequency plan and pin assignments using the manufacturer's configuration tools.