SI5338K-B04912-GMR

Overview

The SI5338K-B04912-GMR is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes any frequency on four differential output drivers with 0 ppm precision. The device supports flexible input references including external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential inputs up to 710 MHz. Outputs support LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats across frequencies from 0.16 to 710 MHz. It features low phase jitter of 0.7 ps RMS typical, independent glitchless frequency/phase adjustments, and configurable spread spectrum. Powered by a single core supply of 1.8, 2.5, or 3.3 V, it operates within –40 to +85 °C in a 24-QFN package.

Feature Summary

• I2C-programmable synthesis with true zero ppm accuracy on all outputs
• Low phase jitter of 0.7 ps RMS typical for high-performance timing
• Flexible input reference supporting crystals, CMOS, and differential clocks up to 710 MHz
• Independent output configuration for LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats

Applications

• PCIe Gen 1/2/3/4 Common Clock and SRNS compliant systems
• Ethernet switch and router timing
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards and MSAN/DSLAM/PON equipment

Procurement Notes

Verify the specific factory configuration encoded in the B04912 suffix against the target design requirements using Skyworks ClockBuilder Pro software. Confirm that the QFN-24 package land pattern matches the recommended PCB layout specifications provided in the datasheet. Ensure I2C pull-up voltages are compatible with the selected core supply voltage.

Selection Notes

Select this component when independent, any-frequency synthesis is required for multiple clock domains without external oscillators. The device replaces up to four crystal oscillators. Verify that the required output signal formats (LVPECL, LVDS, etc.) and frequencies fall within the supported ranges. Check if the 0.7 ps RMS jitter performance meets system constraints.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'K' designation indicates a specific factory-programmed configuration variant. The '-GMR' suffix denotes tape-and-reel packaging for surface-mount assembly. The device integrates MultiSynth technology to provide highly configurable clock solutions in a compact form factor.

Replacement Considerations

Direct pin-to-pin replacements within the Si5338 family include other pre-configured variants such as SI5338A-Bxxxxx-GMR or SI5338Q-Bxxxxx-GMR. Substitution requires verifying that the new part's factory-programmed frequency and format settings match the original design specifications.