SI5335D-B15743-GMR

Overview

The Skyworks SI5335D-B15743-GMR is a web-customizable, any-frequency, any-output quad clock generator and buffer. 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 references 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 4x4 mm 24-QFN package.

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 options: External crystal (25/27 MHz), CMOS (10-200 MHz), SSTL/HSTL, or Differential (10-350 MHz)
• Configurable output drivers: Up to four differential pairs or eight single-ended outputs with selectable formats (LVPECL/LVDS/CML/HCSL/CMOS/SSTL/HSTL)

Applications

• PCI Express Gen 1/2/3/4 common clock generation
• Ethernet switch/router clocking
• Processor and FPGA clocking
• DSL jitter attenuation
• Broadcast video/audio timing

Procurement Notes

Verify the specific factory configuration encoded in the B15743 suffix against the system requirements, as this part is a custom web-configured device. Confirm that the required pin-selectable control functions (SSENB, RESET, OEB, FS) match the available user-assignable pins on the specific revision. Ensure the design accommodates the 24-QFN thermal pad grounding requirements specified in the datasheet.

Selection Notes

Select this model when four distinct, non-integer-related clock frequencies are required from a single component. Verify that the input reference source matches one of the supported types (Crystal, CMOS, SSTL/HSTL, or Differential). Check if the required output voltage levels (1.5V, 1.8V, 2.5V, or 3.3V) can be supported by the available VDDO supplies. Consider the loop bandwidth settings (1.6 MHz or 475 kHz) based on the jitter attenuation needs of the application.

Part Context

The SI5335D-B15743-GMR belongs to the Si5335 family of highly flexible clock generators. The 'D' indicates a specific performance grade or variant within the series, while 'B15743' denotes the unique factory configuration generated via the ClockBuilder Pro utility. The '-GM' suffix typically indicates a lead-free, halogen-free RoHS-compliant tape and reel or tray packaging option, though specific packaging details should be confirmed with the distributor.

Replacement Considerations

Direct replacement requires verifying that the new part has an identical factory configuration file or that the system can accommodate a reconfiguration. Generic Si5335 parts cannot replace this unit without reprogramming. Ensure the footprint (24-QFN 4x4mm) and pinout are compatible.