SI5338C-B05953-GM

Overview

The SI5338C-B05953-GM is a programmable clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize four independent output clocks with zero ppm frequency accuracy. It supports any frequency on each of the four drivers, replacing up to four crystal oscillators. The device operates from a single core supply voltage of 1.8 V, 2.5 V, or 3.3 V and features low phase jitter of 0.7 ps RMS typical. Outputs are configurable for various signal formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL, with independent voltage levels per driver. Configuration is performed via an I2C/SMBus-compatible serial interface.

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, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Flexible input reference options including external crystals (8-30 MHz), CMOS (5-200 MHz), SSTL/HSTL (5-350 MHz), and differential inputs (5-710 MHz).
• Highly configurable output drivers supporting up to four differential outputs, eight single-ended outputs, or combinations thereof.

Applications

• Ethernet switch/router clocking
• PCIe Gen1/2/3/4 common clock generation
• Broadcast video/audio timing systems
• Processor and FPGA clocking solutions
• Telecom line cards and MSAN/DSLAM/PON equipment

Procurement Notes

Verify the specific ordering suffix B05953 against the manufacturer's current datasheet to confirm the exact pre-programmed frequency configuration and output format. Ensure the I2C pull-up voltage requirements match the system design, particularly if operating below 2.5 V. Confirm package availability in the 24-QFN (4x4 mm) form factor and check for moisture sensitivity level requirements during storage and handling.

Selection Notes

Select this component when multiple distinct clock frequencies are required from a single IC to reduce board space compared to discrete oscillators. Ensure the target output frequencies fall within the supported ranges for the desired signal format (e.g., LVDS up to 710 MHz, CMOS up to 200 MHz). Verify that the input reference source matches one of the supported types: crystal, single-ended CMOS, or differential signals. Consider the power supply constraints, as the device requires a single core voltage of 1.8 V, 2.5 V, or 3.3 V.

Part Context

The SI5338C-B05953-GM belongs to the Si5338 family of I2C-programmable quad clock generators. This series is designed to replace multiple fixed-frequency crystal oscillators with a single flexible solution. The 'C' designation typically indicates commercial temperature range operation (-40°C to +85°C), while the suffix specifies the factory-programmed clock configuration. The device integrates NVM for storing configurations, allowing for field programming or permanent setup.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different pre-programmed configurations (e.g., SI5338C-Bxxxxx-GM). When substituting, ensure the new part supports the required output frequencies and formats. For legacy Silicon Labs versions, verify compatibility with Skyworks software tools like ClockBuilder Pro. Generic clock generators may not offer the same jitter performance or MultiSynth flexibility.