SI5338C-B15672-GMR

Clock Generators, PLLs, Frequency Synthesizers Overview

The SI5338C-B15672-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 0 ppm precision. The device supports a wide range of input references, including differential clocks up to 710 MHz and single-ended inputs up to 350 MHz. Outputs are configurable for LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats, with individual supply voltages of 1.5, 1.8, 2.5, or 3.3 V per driver. It operates from a single core supply (1.8, 2.5, or 3.3 V) in a 4x4 mm QFN-24 package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• I2C/SMBus programmable architecture with glitchless frequency adjustment
• Four independent outputs supporting mixed signal formats and voltages
• Low phase jitter performance: 0.7 ps RMS typical
• Flexible input reference options: Differential (up to 710 MHz), Single-ended, or Crystal

Clock Generators, PLLs, Frequency Synthesizers Applications

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

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific factory configuration code B15672 against the official datasheet ordering information table to confirm the exact pre-programmed frequencies and output configurations. Confirm that the GMR suffix corresponds to the required tape-and-reel packaging quantity for the production run.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this component when multiple distinct clock frequencies are required from a single source. Ensure the target application supports the specific output voltage levels (1.5V–3.3V) and signal formats (LVPECL, LVDS, etc.) supported by the Si5338 family. Verify that the I2C bus voltage compatibility matches the system design.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This part belongs to the Si5338 family of low-jitter clock generators. The 'C' indicates a specific performance grade or feature set within the series, while the alphanumeric suffix defines the factory-programmed register settings. It replaces discrete crystal oscillators and buffer chains in complex digital systems.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct pin-to-pin replacements within the same package require identical pre-programmed frequencies. If custom programming is needed, generic Si5338 variants may be used, provided the I2C interface and power requirements remain compatible.