SI5338C-B03798-GM

Overview

The SI5338C-B03798-GM is a programmable quad clock generator from Skyworks Solutions. It synthesizes four independent output clocks with zero ppm frequency accuracy using MultiSynth technology. The device supports differential and single-ended outputs including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats. Maximum input frequency reaches 710 MHz via differential inputs, while output frequencies vary by format up to 710 MHz for differential and 200 MHz for CMOS. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V within an ambient temperature range of –40 °C to +85 °C.

Feature Summary

• MultiSynth™ technology enables any-frequency synthesis with 0 ppm precision on four independent drivers.
• Flexible output configurations support up to four differential or eight single-ended clocks with independent voltage levels (1.5, 1.8, 2.5, or 3.3 V).
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock standards.
• Programmable via I²C/SMBus interface with features for glitchless frequency adjustment and spread spectrum generation.

Applications

• PCIe Gen 1/2/3/4 systems requiring common clock or SRNS compliance.
• Ethernet switch and router timing circuits.
• Processor and FPGA clocking solutions.
• Broadcast video and audio timing infrastructure.

Procurement Notes

Verify the specific factory configuration code B03798 against the official Skyworks ordering guide to ensure correct output frequencies and formats. Confirm package type is QFN-24 and check RoHS compliance status. Ensure programming software compatibility with the selected variant before procurement.

Selection Notes

Select this model when four independent clock signals are required with mixed voltage domains. Verify that the input reference source matches supported formats such as external crystals (8–30 MHz) or differential CMOS (up to 710 MHz). Ensure the target application requires low jitter specifications compatible with the device's MultiSynth architecture.

Part Context

This component belongs to the Si5338 family of I²C-programmable clock generators. It replaces multiple discrete crystal oscillators in complex digital systems. The 'C' suffix typically denotes specific output driver capabilities or frequency ranges within the broader product line.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different factory codes. Verify that alternative part numbers support the exact required output frequencies and signal formats before substitution.