SI5338J-B04983-GMR

Overview

The SI5338J-B04983-GMR is an I2C-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 a core supply voltage of 1.8 V, 2.5 V, or 3.3 V and operates within a temperature range of –40 °C to +85 °C. It features low phase jitter of 0.7 ps RMS typical, flexible input references up to 710 MHz differential, and configurable output formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. The component is housed in a space-saving 4 x 4 mm QFN-24 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 for high-speed applications like PCIe Gen 1/2/3/4.
• Flexible input reference options including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (up to 710 MHz).
• Independent output voltage configuration per driver supporting 1.5 V, 1.8 V, 2.5 V, or 3.3 V levels.

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS compliant timing.
• Ethernet switch/router and 1 GbE/10 GbE interfaces.
• Processor and FPGA clocking systems.
• Broadcast video/audio timing distribution.
• Telecom line cards and MSAN/DSLAM/PON equipment.

Procurement Notes

Verify the specific B04983 factory code against the manufacturer's current ordering information to confirm the exact frequency plan and pinout configuration. Ensure that the I2C pull-up voltages are compatible with the selected VDDI2C level, particularly if operating below 2.5 V. Confirm RoHS compliance status through official datasheets before procurement.

Selection Notes

Select this model when independent frequency synthesis across four outputs is required without crystal oscillators. Ensure the target output frequencies fall within the supported ranges for the chosen format (e.g., LVDS up to 710 MHz, CMOS up to 200 MHz). Verify that the input reference signal matches the supported types, such as differential clocks up to 710 MHz or single-ended CMOS up to 200 MHz.

Part Context

This component belongs to the Si5338 family of programmable clock generators. The 'J' suffix typically denotes a specific output format capability set, while 'B04983' indicates a factory-specific programming code defining the initial register values. The '-GMR' suffix signifies tape-and-reel packaging suitable for automated surface-mount assembly.

Replacement Considerations

Direct replacements must match the 24-QFN package and support I2C programmability. Consider the Si5338F or Si5338Q variants if different output format combinations or jitter specifications are acceptable. Verify that any substitute supports the required input frequency range and output voltage levels.