SI5338B-B09793-GM

Overview

The SI5338B-B09793-GM is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes four independent output clocks with zero ppm frequency accuracy. The device supports flexible input references, including external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz). Outputs support LVPECL/LVDS up to 710 MHz, HCSL up to 250 MHz, CMOS up to 200 MHz, and SSTL/HSTL up to 350 MHz. It features low phase jitter of 0.7 ps RMS typical, operates on a single core supply of 1.8, 2.5, or 3.3 V, and draws 45 mA typical current. Configuration is managed via an I2C/SMBus interface.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with true zero ppm precision.
• Supports PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliance with low phase jitter of 0.7 ps RMS typical.
• Highly-configurable output drivers allow up to four differential outputs, eight single-ended outputs, or mixed configurations.
• Features independent glitchless frequency adjustments in 1 ppm steps and phase adjustment with <20 ps accuracy.

Applications

• Ethernet switch/router
• PCIe Gen1/2/3/4 systems
• Broadcast video/audio timing
• Processor and FPGA clocking
• MSAN/DSLAM/PON infrastructure

Procurement Notes

Verify the specific factory-programmed NVM configuration for part number SI5338B-B09793-GM using Skyworks ClockBuilder Pro software. Confirm that the pre-defined output frequencies and formats match the target design requirements before procurement, as the internal settings are fixed at the factory.

Selection Notes

Select this component when designing systems requiring four independent clock signals with precise frequency accuracy and low jitter. Ensure the required output voltage levels (1.5, 1.8, 2.5, or 3.3 V) and signal formats (LVPECL, LVDS, HCSL, CMOS, etc.) align with the available driver options. Verify that the input reference source matches one of the supported types: crystal, CMOS, SSTL/HSTL, or differential.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It is housed in a compact 4 x 4 mm, 24-lead QFN package. The device is designed to replace multiple discrete crystal oscillators or function as a frequency translator within complex digital systems.

Replacement Considerations

Direct functional replacements within the same package and pinout include other Si5338 variants such as SI5338A-Bxxxxx-GM or SI5338N-Bxxxxx-GM. However, substitution requires verifying that the replacement part's factory-programmed NVM content matches the original frequency and format specifications.

FAQ

What is the maximum output frequency for LVPECL and LVDS formats?

The maximum output frequency for LVPECL and LVDS formats is 710 MHz.

Can the device perform glitchless frequency adjustments?

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

What is the typical phase jitter performance?

The device provides a typical phase jitter of 0.7 ps RMS.