SI5338C-B05917-GMR

Overview

The SI5338C-B05917-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 operates from a single core supply of 1.8 V, 2.5 V, or 3.3 V and supports flexible input references including external crystals (8–30 MHz), CMOS (up to 200 MHz), SSTL/HSTL (up to 350 MHz), and differential inputs (up to 710 MHz). The device features low phase jitter of 0.7 ps RMS typical, glitchless frequency adjustments in 1 ppm steps, and independent phase adjustment per driver. Outputs support LVPECL, LVDS, HCSL, CMOS, SSTL, HSTL, and CML formats with configurable voltages.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with true zero ppm accuracy.
• Flexible input reference options include external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz).
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Independent frequency increment/decrement feature allows glitchless frequency adjustments in 1 ppm steps, with independent phase adjustment accuracy < 20 ps.

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS generation
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards and MSAN/DSLAM/PON systems

Procurement Notes

Verify the specific ordering suffix B05917 against the manufacturer's current datasheet to confirm factory-programmed frequency and format configurations. Ensure I2C pull-up voltage compatibility if operating below 2.5 V by writing register 27 = 1. Confirm package type is 24-QFN (4x4 mm) and check for moisture sensitivity handling requirements during assembly.

Selection Notes

Select this component when replacing multiple crystal oscillators with a single programmable source requiring independent frequencies and signal formats. Ensure the required output voltage levels (1.5, 1.8, 2.5, or 3.3 V) match the load requirements. Verify that the input reference frequency falls within the supported ranges for the chosen input pin configuration (differential vs. single-ended).

Part Context

The SI5338 series is part of Skyworks' MultiSynth family of low-jitter clock generators. The 'C' in the part number typically denotes a commercial temperature range (-40°C to +85°C), while the 'GMR' suffix indicates tape and reel packaging. This specific variant is pre-configured at the factory for specific frequency and output format requirements, reducing design-in time compared to fully blank devices.

Replacement Considerations

Direct replacements must be from the SI5338 family with compatible pinout and electrical specifications. Verify that alternative part numbers support the same output formats (LVPECL/LVDS/HCSL/CMOS/SSTL/HSTL/CML) and frequency ranges. Check for identical thermal characteristics and package dimensions (24-QFN 4x4 mm) for mechanical compatibility.