SI5338J-B-GMR

Overview

The Skyworks SI5338J-B-GMR is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes any frequency up to 200 MHz on four independent outputs with zero ppm precision. The device features low phase jitter of 0.7 ps RMS and supports flexible input references including differential clocks up to 710 MHz. It operates from a single core supply of 1.8, 2.5, or 3.3 V and offers independently configurable output drivers supporting LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats. Configuration is managed via an I2C/SMBus interface.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with 0 ppm accuracy.
• Low phase jitter performance of 0.7 ps RMS typical.
• Flexible input support: external crystal (8-30 MHz), CMOS (5-200 MHz), SSTL/HSTL (5-350 MHz), and differential (5-710 MHz).
• Independently configurable output voltages (1.5, 1.8, 2.5, or 3.3 V) and signal formats per driver.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm pinout compatibility and factory configuration. Ensure the I2C pull-up voltage requirements match the system bus levels, particularly if operating below 2.5 V. Confirm moisture sensitivity handling procedures are followed during assembly as indicated in the package specifications.

Selection Notes

Select this component when four independent clock signals with precise frequency control are required within a 200 MHz range. It is suitable for replacing multiple discrete oscillators. Ensure the target application supports the available output voltage levels and that the input reference source matches one of the supported formats, such as differential or single-ended CMOS.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It shares the same QFN-24 package and core architecture with other variants like the SI5338A and SI5338Q, which may support higher frequencies up to 710 MHz. The 'J' suffix typically denotes a specific factory programming configuration for frequency and output settings.

Replacement Considerations

Direct replacements include other Si5338 variants such as SI5338A-B-GM or SI5338Q-B-GMR. Verify that the replacement part supports the required output frequencies and formats, as some variants support higher maximum frequencies or different output combinations.