SI5335B-B05728-GMR

Overview

The SI5335B-B05728-GMR 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 flexible input references including external crystals (25/27 MHz), CMOS, SSTL/HSTL, and differential inputs. Outputs are independently configurable for LVPECL, LVDS, CML, HCSL, CMOS, or SSTL/HSTL formats with selectable supply voltages of 1.5, 1.8, 2.5, or 3.3 V. It features low phase jitter of 0.7 ps RMS, two selectable PLL loop bandwidths (1.6 MHz or 475 kHz), and loss-of-signal alarm functionality.

Feature Summary

• Four independent output banks supporting any frequency (< 350 MHz) and format via MultiSynth fractional divider technology
• Low phase jitter performance of 0.7 ps RMS typical in clock generator mode
• Configurable as clock generator or buffer with two selectable PLL loop bandwidths (1.6 MHz or 475 kHz)
• Supports three independent pin-selectable device configurations and up to five user-assignable control pins

Applications

• PCI Express Gen 1/2/3/4 common clock and SRNS compliant systems
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• Processor and FPGA clocking
• DSL jitter attenuation and telecom line cards
• Broadcast video/audio timing

Procurement Notes

Verify the specific factory configuration encoded in the B05728 suffix against system requirements using the ClockBuilder Pro utility. Confirm package availability and moisture sensitivity level (MSL) handling procedures prior to assembly. Ensure the core supply voltage matches the design specification of 1.8 V, 2.5 V, or 3.3 V.

Selection Notes

Select this component when zero ppm frequency synthesis error is required across multiple non-integer-related outputs. Choose between the 1.6 MHz or 475 kHz loop bandwidth based on whether jitter attenuation for PCIe or DSL applications is necessary. Verify that the required output voltage levels (1.5 V to 3.3 V) and formats (LVPECL, LVDS, CMOS, etc.) are supported by the specific B05728 configuration.

Part Context

This part belongs to the Si5335 family of highly flexible clock generators. The 'B' indicates a specific silicon revision or feature set within the series, while the 'GMR' suffix denotes tape-and-reel packaging. The unique identifier B05728 represents a factory-programmed configuration generated via Skyworks' ClockBuilder tool, defining the exact input/output frequencies and control pin mappings.

Replacement Considerations

Direct replacements must match the 24-QFN package and the specific B05728 configuration parameters. Generic Si5335 variants may require reconfiguration via ClockBuilder if the pinout or frequency plan differs. Verify compatibility with existing crystal oscillators or reference clock sources before substitution.