SI5335A-B15687-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The Skyworks SI5335A-B15687-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 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 of 1.5, 1.8, 2.5, or 3.3 V. It operates on a single core supply (1.8, 2.5, or 3.3 V) within an ambient temperature range of –40 to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Four independent outputs supporting any frequency up to 350 MHz with 0 ppm synthesis error
• Three user-assignable, pin-selectable device configurations for system flexibility
• Flexible input reference options including external crystals (25/27 MHz), CMOS, differential, and SSTL/HSTL inputs
• Low phase jitter performance with selectable PLL loop bandwidths of 1.6 MHz or 475 kHz

Clock Generators, PLLs, Frequency Synthesizers Applications

• PCI Express Gen 1/2/3/4 common clock generation
• Ethernet switch and router timing
• Processor and FPGA clocking systems
• DSL and telecom line card jitter attenuation

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory configuration encoded in the B15687 suffix via Skyworks ClockBuilder Pro before integration. Confirm that the required output formats and frequencies match the pre-programmed settings, as this is a customized component. Check current availability status directly with Skyworks Solutions or authorized distributors, as lead times may vary for custom orders.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a design requires multiple distinct clock frequencies from a single package with low jitter. Ensure the input source matches one of the supported types: 25/27 MHz crystal, CMOS, or differential/SSTL/HSTL signals. Verify that the target output voltage levels (1.5V, 1.8V, 2.5V, or 3.3V) are compatible with the receiving devices. Use the ClockBuilder utility to validate the specific B15687 configuration against system requirements.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the Si5335 family of highly flexible clock generators. The 'A' variant typically denotes specific electrical or feature sets within the series, while the 'GMR' suffix indicates a tape-and-reel packaging format suitable for automated surface-mount assembly. The B15687 code represents a unique factory-programmed frequency plan and control pin configuration.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements must be other Si5335 variants with identical B-codes to ensure functional equivalence. Generic Si5335 parts require reprogramming and may not fit mechanically or electrically without design changes. Verify that substitute parts support the same output driver formats and voltage levels.