SI5338C-B05639-GMR

Overview

The SI5338C-B05639-GMR is an I2C-programmable quad clock generator from Skyworks Solutions. It synthesizes any frequency on four output drivers using MultiSynth technology, achieving zero ppm precision. The device supports a core supply of 1.8 V, 2.5 V, or 3.3 V and operates within a temperature range of –40 to +85 °C. It features low phase jitter of 0.7 ps RMS typical and accepts differential inputs up to 710 MHz. Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats with independent voltage levels.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm precision.
• Low phase jitter performance of 0.7 ps RMS typical across various output formats.
• Flexible input reference options including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential signals (up to 710 MHz).
• Independent output voltage configuration per driver supporting 1.5, 1.8, 2.5, or 3.3 V.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant systems.
• Ethernet switch/router timing solutions.
• Processor and FPGA clocking architectures.
• Broadcast video/audio timing distribution.
• Telecom line cards and MSAN/DSLAM/PON equipment.

Procurement Notes

Verify the specific factory programming parameters associated with the B05639 suffix against the design requirements. Confirm that the QFN-24 package land pattern matches the recommended PCB layout in the datasheet. Ensure I2C pull-up voltages align with the supported 1.71 to 3.63 V range for proper communication.

Selection Notes

Select this component when zero ppm frequency accuracy and low jitter are critical for multiple asynchronous clocks. The Si5338C variant supports output frequencies up to 200 MHz for single-ended formats and higher for differential outputs. Verify that the required input reference frequency falls within the supported ranges for crystal or direct drive modes.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces multiple discrete oscillators by providing four independently configurable outputs. The device integrates a PLL and MultiSynth dividers to generate precise clock signals from a single reference source.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different factory configurations. Ensure the replacement part supports the required output frequencies and signal formats. Consult the ordering information section for compatible alternatives with matching electrical characteristics.