SI5335C-B04383-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5335C-B04383-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 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 a –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 via MultiSynth fractional divider technology
• Three user-assignable, pin-selectable device configurations allowing one device to replace multiple clock generators
• Flexible input reference support: External crystal (25/27 MHz), CMOS (10–200 MHz), SSTL/HSTL (10–350 MHz), and Differential (10–350 MHz)
• Configurable output drivers supporting LVPECL/LVDS/CML (1–350 MHz), HCSL (1–250 MHz), CMOS (1–200 MHz), and 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 B04383 suffix against the system requirements using the ClockBuilder Pro utility. Confirm that the 24-QFN package dimensions and thermal characteristics meet the PCB land pattern specifications. Ensure the selected core supply voltage (1.8 V, 2.5 V, or 3.3 V) aligns with the available power rails in the target design.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when four distinct, non-integer-related clock frequencies are required from a single source. Verify that the input reference type matches the available system clock (crystal vs. driven input). Check if the required output voltage levels (1.5 V, 1.8 V, 2.5 V, or 3.3 V) are supported by the individual output driver supplies. Consider the loop bandwidth settings (1.6 MHz or 475 kHz) based on the jitter attenuation needs of the application.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5335 family of highly flexible clock generators. The 'C' in the model number typically denotes a specific revision or variant within the series, while the alphanumeric suffix defines the custom frequency plan and pin configuration. It replaces discrete oscillators and buffers in complex digital systems requiring precise timing.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements require matching the custom frequency plan and pin configuration. Generic Si5335 variants may not provide the same output frequencies or control pin mappings. Verify compatibility with existing PCB layout and control logic before substituting.