SI5335A-B04923-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5335A-B04923-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 features low phase jitter of 0.7 ps RMS, two selectable PLL loop bandwidths (1.6 MHz or 475 kHz), and operates within a temperature range of –40 to +85 °C in a 4x4 mm 24-QFN package.

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 signals.
• Configurable output drivers support LVPECL, LVDS, CML, HCSL, CMOS, and SSTL/HSTL formats with independent voltage selection.
• Features two selectable PLL loop bandwidths (1.6 MHz or 475 kHz) for jitter attenuation.

Clock Generators, PLLs, Frequency Synthesizers Applications

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific configuration encoded in the ordering suffix B04923 via the Skyworks ClockBuilder Pro utility or official datasheet, as this part number represents a factory-programmed variant. Confirm availability through authorized distributors, as lead times may vary for customized silicon. Ensure the selected output format and voltage levels match the target system requirements before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when designing systems requiring four distinct clock frequencies derived from a single reference without integer multiples. Choose between the 1.6 MHz or 475 kHz loop bandwidth based on the required jitter attenuation performance for PCIe or DSL applications. Ensure the output driver voltage (1.5V, 1.8V, 2.5V, or 3.3V) matches the load specifications for LVPECL, LVDS, or CMOS interfaces.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5335 family of highly flexible clock generators. Unlike generic buffers, it utilizes fractional divider technology to generate arbitrary frequencies. The 'GM' suffix indicates a tape-and-reel packaging option, while the alphanumeric code defines the specific frequency plan and pin configuration programmed at the factory.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements require matching the 24-QFN package and electrical characteristics. Verify that alternative clock generators support the same maximum output frequency (350 MHz) and provide comparable jitter performance (0.7 ps RMS). Check if the substitute device offers similar flexibility in output format selection and independent voltage control.