SI5338C-B-GM

Overview

The SI5338C-B-GM is a quad clock generator from Skyworks Solutions, 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 V, 2.5 V, or 3.3 V and features programmable spread spectrum generation. Key electrical parameters include a typical phase jitter of 0.7 ps RMS, a maximum input frequency of 710 MHz, and a typical core supply current of 45 mA.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with zero ppm precision.
• Supports flexible input references including external crystals (8-30 MHz), CMOS, SSTL/HSTL, and differential inputs up to 710 MHz.
• Features low phase jitter of 0.7 ps RMS typical and glitchless frequency adjustments in 1 ppm steps.
• Configurable output drivers support LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats with independent voltage levels.

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS compliant timing
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• Processor and FPGA clocking systems
• Telecom line cards and broadcast video/audio timing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. Ensure I2C pull-up voltages are compatible with the selected core supply voltage. Confirm that the required output formats and frequencies align with the device's electrical specifications before procurement.

Selection Notes

Select this component for designs requiring multiple independent clock frequencies from a single IC. Verify that the target output signal formats (LVDS, LVPECL, etc.) match the configurable driver capabilities. Ensure the input reference source meets the specified frequency and impedance requirements for optimal jitter performance.

Part Context

The SI5338 belongs to the Si533x family of I2C-programmable clock generators. It replaces multiple discrete oscillators by providing four independent outputs. The device integrates a PLL and MultiSynth dividers to achieve high-precision frequency synthesis within a compact 4x4 mm QFN package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.

FAQ

What is the maximum input frequency supported by the SI5338?

The device supports a maximum differential input frequency of 710 MHz.

Can the SI5338 perform glitchless frequency adjustments?

Yes, it features an independent frequency increment/decrement capability that allows glitchless adjustments in 1 ppm steps.

What output signal formats are supported?

The outputs support LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats.