SI5335A-B05940-GM

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5335A-B05940-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 configurable for LVPECL, LVDS, CML, HCSL, CMOS, SSTL, or HSTL formats with independent voltage levels (1.5V, 1.8V, 2.5V, or 3.3V). It operates on a single core supply of 1.8V, 2.5V, or 3.3V, with a typical core current of 45 mA in PLL mode and 12 mA in buffer mode. The component is housed in a 4x4 mm, 24-QFN package and functions within an ambient temperature range of –40 to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four-output clock generator supporting any frequency (< 350 MHz) with 0 ppm synthesis error via MultiSynth fractional divider technology
• Three independent, user-assignable, pin-selectable device configurations allowing one device to replace multiple clock generators
• Flexible input reference options including external crystals (25/27 MHz), CMOS (10–200 MHz), SSTL/HSTL (10–350 MHz), and differential inputs (10–350 MHz)
• Independently configurable outputs 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
• Broadcast video/audio timing and processor/FPGA clocking

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory configuration encoded in the ordering suffix B05940, as this part is web-customized. Confirm that the required pin-selectable control functions (SSENB, RESET, OEB, FS) align with the system design requirements. Ensure the selected loop bandwidth (1.6 MHz or 475 kHz) matches the jitter attenuation needs of the target application, such as PCIe or DSL standards.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when a single device must replace multiple fixed-frequency oscillators or buffers. Choose based on the required output voltage levels (1.5V, 1.8V, 2.5V, or 3.3V) and format compatibility with downstream receivers. Consider the two selectable PLL loop bandwidths for optimizing jitter performance in specific applications like PCIe or DSL. Verify that the input reference source (crystal, CMOS, or differential) is compatible with the configured input pins.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The SI5335A-B05940-GM belongs to the Si5335 family of highly flexible clock generators. This series utilizes Skyworks' patented MultiSynth technology to provide low-power, any-frequency synthesis. The 'A' variant typically denotes specific electrical or packaging characteristics within the family, while the alphanumeric suffix indicates the unique factory-programmed configuration. It serves as a versatile solution for complex clocking architectures requiring multiple distinct frequencies from a single source.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When replacing existing clock ICs, verify that the new configuration supports all necessary output frequencies, formats, and pin-selectable control functions. Ensure the replacement device meets the same thermal and power supply requirements.