SI5338B-B04802-GMR

Overview

The SI5338B-B04802-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology for independent frequency synthesis on four output drivers. It supports any frequency up to 710 MHz with zero ppm precision and features low phase jitter of 0.7 ps RMS typical. The device accepts various input references including differential clocks up to 710 MHz and single-ended CMOS/SSTL/HSTL inputs. Outputs are configurable for LVPECL, LVDS, CML, HCSL, CMOS, SSTL, or HSTL formats with independent supply voltages (1.5V, 1.8V, 2.5V, 3.3V). It operates on a single core supply of 1.8V, 2.5V, or 3.3V, draws 45 mA typical current, and is housed in a 24-lead QFN package.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm precision.
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Flexible input reference options: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz).
• Independent output voltage per driver (1.5, 1.8, 2.5, or 3.3 V) and support for glitchless frequency adjustments via independent increment/decrement feature.

Applications

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

Procurement Notes

Verify the specific factory configuration code B04802 against the official Skyworks ordering guide to ensure correct output frequencies and formats. Confirm RoHS compliance status and check for moisture sensitivity level requirements during storage and handling. Ensure I2C pull-up voltages match the system design, noting register adjustments may be needed for bus voltages below 2.5 V.

Selection Notes

Select this component when four independent clock outputs with varying frequencies and signal formats are required from a single device. Ensure the input reference frequency falls within the supported ranges for the chosen input type. Verify that the required output frequencies do not exceed the limits for specific formats (e.g., 200 MHz for CMOS, 710 MHz for LVDS/LVPECL/CML). Consider thermal resistance characteristics if operating at high ambient temperatures.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The suffix 'GMR' indicates it is supplied in a tape and reel packaging format suitable for automated surface-mount assembly. The 'B' designation refers to a specific factory programming configuration defining the output frequencies and formats.

Replacement Considerations

Direct pin-to-pin replacements within the Si5338 family include other variants like SI5338A, SI5338C, SI5338J, or SI5338Q, provided their factory configurations match the required output frequencies and formats. Verify that the replacement part's electrical specifications, particularly jitter performance and output drive capabilities, meet the application requirements.