SI5335D-B12637-GMR

Overview

The Skyworks SI5335D-B12637-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 for 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 support LVPECL, LVDS, CML, HCSL, CMOS, and SSTL/HSTL formats 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.

Feature Summary

• Four independent output banks supporting any frequency (< 350 MHz) with 0 ppm synthesis error
• Three user-assignable, pin-selectable device configurations for multi-function replacement
• Flexible input options: External crystal, CMOS, SSTL/HSTL, or differential signals
• Configurable output drivers with independent voltage selection (1.5V, 1.8V, 2.5V, 3.3V)

Applications

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

Procurement Notes

Verify the specific factory configuration encoded in the B12637 suffix via the official Skyworks ClockBuilder Pro tool or datasheet ordering section. Confirm package type and RoHS compliance status before procurement. Check current distributor availability as custom parts may have limited stock or longer lead times.

Selection Notes

Select this part when multiple distinct clock frequencies are required from a single source with zero ppm error. Ensure the input reference matches available system clocks (crystal vs. driven input). Verify that the required output voltage levels and formats (LVDS, LVPECL, etc.) are supported by the specific configuration file generated for this part number.

Part Context

This component belongs to the Si5335 family of highly flexible clock generators. The 'D' suffix typically denotes a specific package or variant within the series, while 'GMR' indicates tape and reel packaging. It replaces multiple discrete oscillators and buffers in complex digital systems requiring precise timing.

Replacement Considerations

Direct replacements require identical frequency plans and pin configurations. Other Si5335 variants (e.g., Si5335A, Si5335B) may share the same package but require reconfiguration via ClockBuilder Pro to match electrical parameters and output formats.