SI5338Q-B04079-GM

Application Specific Clock/Timing Overview

The SI5338Q-B04079-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, CML, HCSL, CMOS, SSTL, and HSTL. Key electrical parameters include a maximum output frequency of 710 MHz for differential formats and 200 MHz for CMOS. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, with typical current consumption of 45 mA. The unit features low phase jitter of 0.7 ps RMS typ and is housed in a 24-lead QFN package.

Application Specific Clock/Timing Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with true zero ppm accuracy.
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock standards.
• Highly configurable output drivers supporting up to four differential or eight single-ended outputs with independent voltage levels (1.5, 1.8, 2.5, or 3.3 V).
• I2C/SMBus compatible interface for programming, supporting glitchless frequency adjustments in 1 ppm steps.

Application Specific Clock/Timing Applications

• PCIe Gen 1/2/3/4 systems
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing

Application Specific Clock/Timing Procurement Notes

Verify the specific factory-programmed configuration associated with the suffix B04079, as this determines the exact output frequencies and formats. Confirm that the I2C pull-up voltage requirements align with the system design, particularly if operating below 2.5 V. Ensure ESD protection measures are adequate given the device's sensitivity.

Application Specific Clock/Timing Selection Notes

Select this component when multiple distinct clock frequencies are required from a single IC to reduce board space compared to discrete oscillators. Verify that the input reference source matches the supported formats (crystal, CMOS, or differential). Check that the required output signal types (LVDS, LVPECL, etc.) are supported by the specific output pins available in the chosen configuration.

Application Specific Clock/Timing Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'Q' suffix typically denotes automotive qualification, while 'B04079' indicates a specific factory-programmed NVM configuration. The '-GM' suffix specifies the tape and reel packaging format. It serves as a replacement for multiple crystal oscillators in complex digital systems.

Application Specific Clock/Timing Replacement Considerations

Direct replacements within the same family include other Si5338 variants with different NVM configurations (e.g., SI5338Q-Bxxxxx-GM). Ensure the substitute part has the correct pinout and electrical characteristics. Verify that the new part's programmed frequencies match the original design requirements.