SI5338B-B04973-GM

Overview

The SI5338B-B04973-GM is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes any frequency on four independent outputs with zero ppm precision. The device supports differential and single-ended formats including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL. It operates from a 1.8 V, 2.5 V, or 3.3 V core supply with a typical current of 45 mA. Maximum input frequency reaches 710 MHz via differential inputs, while output frequencies extend up to 710 MHz for LVPECL/LVDS/CML. Typical phase jitter is 0.7 ps RMS. It is housed in a 24-lead QFN package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four drivers with 0 ppm accuracy.
• Supports diverse output formats: LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL.
• Low phase jitter of 0.7 ps RMS typical; compliant with PCIe Gen 1/2/3/4 Common Clock.
• Flexible input reference options including external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential signals.

Applications

• PCIe Gen 1/2/3/4 systems
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing

Procurement Notes

Verify the specific B04973 factory configuration against the datasheet ordering information table. Confirm that the I2C address and initial register settings match the target system requirements. Ensure the QFN-24 thermal pad is properly connected to ground for optimal heat dissipation during operation.

Selection Notes

Select this component when four independent clock signals with varying frequencies and voltage levels are required from a single source. It replaces multiple discrete oscillators. Ensure the input reference signal meets the slew rate requirements for low jitter performance. Verify that the desired output frequencies fall within the supported ranges for the selected driver format.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' suffix indicates a specific factory-programmed configuration with fixed output frequencies and formats defined by Skyworks Solutions. It shares the same pinout and electrical characteristics as other Si5338 variants but differs in its pre-loaded NVM content.

Replacement Considerations

Direct replacements must be other Si5338 variants with identical B-suffix configurations or reprogrammable Si5338 devices programmed to match the exact frequency and format specifications. Verify pin compatibility and thermal requirements when substituting.