SI5338C-B05411-GM

Overview

The SI5338C-B05411-GM is a programmable quad clock generator from Skyworks Solutions. It utilizes MultiSynth technology to synthesize any frequency on four independent output drivers with zero ppm precision. The device supports differential and single-ended outputs, including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats. It operates from a single core supply of 1.8 V, 2.5 V, or 3.3 V and features low phase jitter of 0.7 ps RMS typical. Configuration is performed via an I2C/SMBus interface.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with 0 ppm accuracy.
• Supports flexible input references: external crystals (8-30 MHz), CMOS (5-200 MHz), SSTL/HSTL (5-350 MHz), and differential inputs (5-710 MHz).
• Independent output voltage per driver selectable at 1.5, 1.8, 2.5, or 3.3 V.
• Features glitchless frequency adjustments in 1 ppm steps and independent phase adjustment with <20 ps resolution.

Applications

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

Procurement Notes

Verify the specific factory configuration code embedded in the ordering suffix against the required frequency plan. Confirm that the package marking matches the intended revision. Ensure the I2C pull-up voltage compatibility is validated if operating below 2.5 V. 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. Ensure the desired output format (LVDS, LVPECL, etc.) and voltage levels match the load requirements. Verify that the input reference source falls within the supported frequency ranges for the chosen input pin configuration.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and frequency translators. The 'C' indicates a specific factory configuration, while 'GMR' denotes tape and reel packaging. It shares the same 24-QFN package and electrical characteristics as other variants in the series.

Replacement Considerations

Direct replacements must be from the Si5338 family with compatible factory configurations. Verify that the substitute part number supports the exact same output frequencies and formats. Check for differences in package marking or manufacturing date codes if long-term availability is a concern.

FAQ

What is the maximum input frequency supported?

The device supports differential inputs up to 710 MHz, SSTL/HSTL inputs up to 350 MHz, CMOS inputs up to 200 MHz, and external crystals between 8 and 30 MHz.

Can the output drivers operate at different voltages?

Yes, each of the four output drivers can be independently configured to support supply voltages of 1.5 V, 1.8 V, 2.5 V, or 3.3 V.

How is the device programmed?

The Si5338 is programmed via an I2C/SMBus-compatible serial interface. Skyworks provides ClockBuilder Pro software to facilitate this configuration process.