SI5338N-B05554-GMR

Overview

The SI5338N-B05554-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers with zero ppm precision. It supports differential and single-ended outputs including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats. The device accepts flexible inputs such as external crystals (8–30 MHz), CMOS (up to 200 MHz), or differential signals (up to 710 MHz). Powered by a single core supply of 1.8, 2.5, or 3.3 V, it features low phase jitter of 0.7 ps RMS typical, glitchless frequency adjustments, and spread spectrum capabilities within a compact 4x4 mm QFN-24 package.

Feature Summary

• MultiSynth™ Technology: Generates four independent clocks with 0 ppm accuracy using patented synthesis architecture.
• Flexible Output Drivers: Supports up to four differential or eight single-ended outputs in various formats (LVPECL, LVDS, HCSL, CMOS, SSTL, HSTL) with independent voltage levels (1.5V, 1.8V, 2.5V, 3.3V).
• Low Jitter Performance: Achieves typical RMS phase jitter of 0.7 ps, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Glitchless Frequency Adjustment: Enables independent frequency increment/decrement in 1 ppm steps and phase adjustment with <20 ps resolution via I2C/SMBus interface.

Applications

• PCIe Gen 1/2/3/4 systems requiring common clock or SRNS compliance.
• Ethernet switch/router and 1 GbE/10 GbE networking equipment.
• Processor and FPGA clocking solutions.
• Broadcast video/audio timing infrastructure.
• Telecom line cards and MSAN/DSLAM/PON applications.

Procurement Notes

Verify the specific ordering suffix B05554 against the manufacturer's current datasheet to confirm the exact pre-programmed frequency configuration and output pin assignments. Ensure the I2C pull-up voltage compatibility matches the system bus requirements, particularly if operating below 2.5 V. Confirm thermal management needs based on the 37 °C/W junction-to-ambient resistance in still air conditions.

Selection Notes

Select this component when multiple distinct clock frequencies are required from a single source with high precision. Ensure the input reference signal matches the supported formats (crystal, CMOS, or differential) and frequency ranges. Verify that the required output voltage levels (1.5V to 3.3V) align with the target receiver specifications. Consider the 4x4 mm QFN-24 package constraints for PCB layout and thermal dissipation.

Part Context

The SI5338 series replaces discrete crystal oscillators and frequency translators. The 'N' suffix typically denotes a specific factory-programmed configuration variant within the Si5338 family. The '-GMR' suffix indicates tape-and-reel packaging for automated surface-mount assembly. This part belongs to the broader Si533x family of I2C-programmable clock generators designed for low-jitter applications.

Replacement Considerations

Direct replacements must be sought from the Skyworks Si5338 family with matching programming configurations. Generic clock generators may not support the same MultiSynth flexibility or jitter performance. Verify pinout compatibility and I2C register mapping if substituting with other Skyworks devices like the Si534x or Si53xx series.