SI5335A-B04842-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5335A-B04842-GM is a web-customizable, any-frequency, any-output quad clock generator and buffer from 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 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 operates on a single core supply (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 independent output banks supporting any frequency (< 350 MHz) with 0 ppm synthesis error via MultiSynth fractional divider technology.
• Configurable as a clock generator or buffer with two selectable PLL loop bandwidths (1.6 MHz or 475 kHz) for jitter attenuation.
• Supports up to three independent, pin-selectable device configurations and five user-assignable control pins for system flexibility.
• Low phase jitter performance (0.7 ps RMS typical) and compliance with PCIe Gen 1/2/3/4 common clock and SRNS standards.

Clock Generators, PLLs, Frequency Synthesizers Applications

• PCI Express Gen 1/2/3/4 systems
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• 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 ordering suffix B04842 against the target design requirements using the ClockBuilder Pro utility. Confirm availability status directly with Skyworks Solutions or authorized distributors, as custom-configured parts may have limited stock or specific lead times. Ensure the package marking matches the ordered part number to prevent counterfeit substitution.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when multiple distinct clock frequencies are required from a single source with zero ppm error. Choose between PLL modes for jitter attenuation or bypass mode for low additive jitter based on application needs. Verify that the required output voltage levels (1.5V–3.3V) and signal formats (LVDS, LVPECL, etc.) are supported by the specific configuration generated for this part number.

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 complete customization of frequency plans and output formats through Skyworks' web-based configuration tool. The 'GM' suffix indicates a lead-free, halogen-free RoHS-compliant package, specifically the 24-lead QFN form factor.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements must be other Si5335 variants with identical factory configurations. Generic Si5335 devices will not function as substitutes unless reconfigured. Check for newer revisions of the Si5335 datasheet to ensure compatibility with existing PCB layouts and electrical specifications.