SI5335A-B05821-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5335A-B05821-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 output drivers compatible with LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, with individual output voltage selection. Key specifications include a typical RMS jitter of 0.7 ps, a 24-lead QFN package, and an operating temperature range of –40 to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• MultiSynth fractional divider technology enables independent synthesis of four frequencies up to 350 MHz with 0 ppm error.
• Supports three independent, user-assignable, pin-selectable device configurations for system flexibility.
• Flexible input reference options including external crystals (25/27 MHz), CMOS, SSTL/HSTL, and differential inputs.
• Configurable output drivers support multiple formats: LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL.

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
• Broadcast video/audio timing

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory configuration encoded in the ordering suffix B05821, as this part is web-customized. Confirm that the required pin-selectable control functions and output formats match the pre-programmed settings. Ensure compatibility with the intended input reference source and supply voltages before procurement.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when four distinct, non-integer-related clock frequencies are required from a single device. Choose between the 1.6 MHz or 475 kHz PLL loop bandwidth based on the specific jitter attenuation needs for PCIe or DSL applications. Verify that the desired output voltage levels (1.5, 1.8, 2.5, or 3.3 V) are supported by the factory configuration.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5335 family of highly flexible clock generators. The 'A' designation typically indicates the maximum frequency capability of 350 MHz, distinguishing it from lower-frequency variants like the Si5335B. The 'GM' suffix denotes the 24-QFN package type.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements must be from the Si5335 family with matching 350 MHz capability and 24-QFN packaging. Verify that any substitute part supports the same number of outputs and compatible output driver formats. Note that custom configuration parts may not have direct pin-compatible substitutes without reconfiguration.