SI5335B-B04485-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5335B-B04485-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 fractional divider technology, ensuring 0 ppm frequency synthesis error. The device features four output banks supporting differential pairs or single-ended outputs with configurable formats including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V and supports independent output voltage levels. Key electrical parameters include a maximum output frequency of 350 MHz, a typical phase jitter of 0.7 ps RMS, and an operating temperature range of –40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four independent output banks support any frequency up to 350 MHz with 0 ppm synthesis error.
• Configurable output drivers support LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats.
• Supports three independent, pin-selectable device configurations for system flexibility.
• Low phase jitter of 0.7 ps RMS with 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 and jitter attenuation
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• Processor and FPGA clocking
• DSL jitter attenuation and telecom line cards

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific configuration code B04485 against the official Skyworks ClockBuilder Pro database to confirm the exact frequency plan and pin assignments. As this is a factory-customized part, lead times and availability are subject to Skyworks production schedules rather than standard distributor stock. Confirm RoHS compliance and moisture sensitivity level requirements prior to ordering.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when multiple non-integer-related clock frequencies are required from a single source. Ensure the input reference matches the supported types: external crystal (25/27 MHz), CMOS (up to 200 MHz), or differential/SSTL/HSTL (up to 350 MHz). Verify that the required output voltage levels (1.5, 1.8, 2.5, or 3.3 V) align with the target receiver specifications and that the package size fits the PCB land pattern.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5335 family of highly flexible clock generators. The 'B' suffix typically denotes a specific performance grade or feature set within the series, while the alphanumeric code 'B04485' represents a unique factory-programmed configuration file. The '-GM' suffix indicates the QFN-24 package and lead-free composition.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacement requires matching the custom configuration file. Generic Si5335 variants may not provide the same frequency plan or pinout. If replacing, ensure the new part supports the same input reference type and output drive strengths. Consult Skyworks for cross-reference validation if the original configuration data is unavailable.