SI5335B-B05653-GM

Overview

The SI5335B-B05653-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 fractional divider 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. It features independently configurable output drivers supporting LVPECL, LVDS, CML, HCSL, CMOS, and SSTL/HSTL formats with individual voltage supplies of 1.5, 1.8, 2.5, or 3.3 V. Key electrical parameters include a core supply voltage range of 1.71–3.63 V, operating temperature from –40 to +85 °C, and low phase jitter of 0.7 ps RMS.

Feature Summary

• Four independent outputs capable of synthesizing any frequency up to 350 MHz with 0 ppm error
• Configurable as a clock generator or buffer with three pin-selectable device configurations
• Low phase jitter of 0.7 ps RMS and two selectable PLL loop bandwidths (1.6 MHz or 475 kHz)
• Flexible input support for crystals, CMOS, SSTL/HSTL, and differential signals

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

Procurement Notes

Verify the specific factory configuration encoded in the B05653 suffix against the system requirements, as this part is a custom-programmed device. Confirm that the required output formats, frequencies, and control pin assignments match the design specifications. Check current availability status with distributors, as customized parts may have limited stock or longer lead times compared to standard off-the-shelf components.

Selection Notes

Select this component when multiple distinct clock frequencies are needed from a single source with high precision. Ensure the input reference matches one of the supported types: 25/27 MHz crystal, CMOS (10–200 MHz), or differential/SSTL/HSTL (up to 350 MHz). Verify that the output driver voltages (1.5, 1.8, 2.5, or 3.3 V) align with the receiving devices. Consider the PLL loop bandwidth setting based on whether jitter attenuation or fast lock time is prioritized.

Part Context

This part belongs to the Si5335 family of highly flexible clock generators. The 'B' in the model number typically denotes a specific performance grade or feature set within the series, while the numeric suffix indicates the unique factory programming. It replaces multiple discrete clock oscillators and buffers, simplifying PCB layout and reducing component count in complex digital systems requiring precise timing.

Replacement Considerations

Direct replacements must be other Si5335 variants with identical factory programming. Generic Si5335 parts will not function correctly without reprogramming. Verify compatibility with existing CrystalBuilder or ClockBuilder Pro configuration files if migrating between different Si5335 sub-models.