SI5338C-B03798-GMR

Overview

The SI5338C-B03798-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports differential and single-ended formats including LVDS, LVPECL, HCSL, CMOS, SSTL, and HSTL. The device operates with a core supply of 1.8 V, 2.5 V, or 3.3 V and features low phase jitter of 0.7 ps RMS typical. It accepts flexible input references up to 710 MHz via differential inputs or 200 MHz via single-ended CMOS. Configuration is managed through an I2C/SMBus interface.

Feature Summary

• Four independent output drivers supporting any frequency synthesis with 0 ppm precision
• Low phase jitter performance of 0.7 ps RMS typical
• Flexible input reference options: external crystal (8-30 MHz), CMOS (5-200 MHz), or differential (5-710 MHz)
• Configurable output formats: LVPECL, LVDS, CML, HCSL, CMOS, SSTL, HSTL

Applications

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

Procurement Notes

Verify the specific suffix B03798 against the official Skyworks ordering guide to confirm factory programming parameters. Confirm package type is QFN-24 and check for moisture sensitivity level requirements during storage and handling. Ensure I2C pull-up voltages match the selected core supply voltage.

Selection Notes

Select this model when four independent clock outputs are required with low jitter specifications. Verify that the desired output signal formats (LVDS, LVPECL, etc.) and frequencies fall within the supported ranges. Ensure the input reference source matches the compatible pin configurations (IN1/2/5/6 for differential, IN3/4 for single-ended).

Part Context

This component belongs to the Si5338 family of I2C-programmable any-frequency, any-output quad clock generators. It replaces multiple discrete crystal oscillators in complex digital systems. The device integrates PLL and MultiSynth stages for precise frequency generation and includes spread spectrum capabilities for EMI reduction.

Replacement Considerations

Direct replacements within the same family include SI5338A, SI5338B, SI5338C, SI5338J, SI5338P, and SI5338Q variants. Selection depends on matching maximum output frequency limits (200 MHz vs 350 MHz vs 710 MHz) and specific output format support. Verify pin compatibility as all share the 24-QFN footprint.