SI5335A-B05188-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5335A-B05188-GM is a web-customizable, any-frequency, any-output quad clock generator and buffer manufactured by 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 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 as LVPECL, LVDS, CML, HCSL, CMOS, or SSTL/HSTL 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 output banks supporting any frequency (< 350 MHz) with 0 ppm synthesis error via MultiSynth technology
• Three user-assignable, pin-selectable device configurations for replacing multiple clock ICs
• Flexible input reference: External crystal (25/27 MHz), CMOS (10–200 MHz), SSTL/HSTL (10–350 MHz), or Differential (10–350 MHz)
• Configurable output drivers: Up to four differential pairs or eight single-ended outputs with independent voltage levels (1.5, 1.8, 2.5, 3.3 V)

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 configuration encoded in the ordering suffix B05188 against system requirements using the ClockBuilder Pro utility. Confirm availability through authorized distributors as stock levels vary. Ensure the selected package variant matches the PCB land pattern specifications provided in the datasheet.

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 PLL modes (1.6 MHz or 475 kHz bandwidth) based on jitter attenuation needs for PCIe or DSL applications. Verify that the required output voltage levels (1.5V, 1.8V, 2.5V, or 3.3V) are compatible with the target loads. Use the web-based configuration tool to define the exact frequency plan and pin assignments.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The SI5335A-B05188-GM belongs to the Si5335 family of highly flexible clock generators. The 'A' indicates the primary series variant, while the suffix 'B05188' defines the specific factory-programmed frequency plan, output formats, and control pin functions. The '-GM' denotes the 24-lead QFN package. This part replaces multiple discrete oscillators and buffers in complex digital systems.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacement requires matching the original device's frequency plan and output formats. Since the Si5335 is web-customizable, verify if the legacy part was also a Skyworks Si5335 variant. If substituting with other manufacturers, ensure equivalent jitter performance, output drive strength, and supply voltage compatibility.