SI5335C-B05939-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5335C-B05939-GM 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 three independent pin-selectable configurations and features flexible input options including external crystals (25/27 MHz), CMOS, SSTL/HSTL, and differential inputs. Outputs are configurable for LVPECL, LVDS, CML, HCSL, CMOS, or SSTL/HSTL formats 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 the -40 to +85 °C temperature range.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four independent outputs supporting any frequency (< 350 MHz) with 0 ppm synthesis error
• Three user-assignable, pin-selectable device configurations for multi-function replacement
• Flexible input reference: External crystal, CMOS (10-200 MHz), SSTL/HSTL, or Differential (10-350 MHz)
• Configurable output drivers: LVPECL/LVDS/CML (1-350 MHz), HCSL (1-250 MHz), CMOS (1-200 MHz), SSTL/HSTL (1-350 MHz)

Clock Generators, PLLs, Frequency Synthesizers Applications

• PCI Express Gen 1/2/3/4 common clock and jitter attenuation
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• DSL jitter attenuation and MSAN/DSLAM/PON systems
• Processor and FPGA clocking

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory configuration encoded in the B05939 suffix via the ClockBuilder Pro utility or Skyworks support, as this determines the exact input/output frequencies and control pin mappings. Confirm availability status directly with authorized distributors, as lead times may vary for customized silicon.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a single device must replace multiple clock generators or buffers by switching between three distinct frequency plans via pin selection. Ensure the required output voltage levels (1.5V, 1.8V, 2.5V, or 3.3V) match the load requirements for each of the four output banks. Verify that the input source type (crystal vs. driven input) aligns with the system design.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5335 family of highly flexible clock generators. The 'C' variant typically denotes specific internal configuration parameters or package revisions within the Skyworks portfolio. The '-GM' suffix indicates a Green (RoHS compliant) tape and reel packaging format, suitable for automated surface-mount assembly.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct pin-to-pin replacements from other manufacturers are not explicitly documented in the provided datasheet. When substituting, verify that the alternative device supports the same number of outputs, maximum frequency (350 MHz), and compatible output drive strengths. Check if the replacement supports the required three-config pin-selectable functionality.