SI5338C-B05291-GM

Overview

The SI5338C-B05291-GM is a programmable quad clock generator utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports differential and single-ended outputs with frequencies up to 710 MHz. The device operates from a single core supply of 1.8, 2.5, or 3.3 V and features low phase jitter of 0.7 ps RMS typical. Configuration is performed via an I2C/SMBus interface, allowing for glitchless frequency adjustments and spread spectrum generation.

Feature Summary

• MultiSynth technology enables zero ppm precision synthesis on four independent outputs
• Supports LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL output formats
• Low phase jitter performance of 0.7 ps RMS typical
• Glitchless frequency adjustment in 1 ppm steps with independent phase control

Applications

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

Procurement Notes

Verify the specific factory programming code associated with the B05291 suffix against the required system specifications. Confirm that the QFN-24 package dimensions and thermal characteristics align with the target PCB land pattern requirements before finalizing procurement.

Selection Notes

Select this component when independent output voltage levels (1.5, 1.8, 2.5, or 3.3 V) are required per driver. Ensure the input reference source matches the supported formats, including external crystals (8–30 MHz), CMOS (up to 200 MHz), or differential inputs (up to 710 MHz). Validate that the 45 mA typical core supply current fits the power budget.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces multiple discrete crystal oscillators by providing flexible frequency synthesis. The device integrates a PLL and MultiSynth dividers within a compact 4x4 mm QFN package, designed for high-density board layouts requiring precise timing signals.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different factory programming codes. Verify that alternative part numbers support the identical output frequency set and signal formats required by the design.