SI5338C-B04266-GMR

Overview

The SI5338C-B04266-GMR is a 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 flexible input references, including external crystals (8–30 MHz), CMOS (up to 200 MHz), and differential inputs (up to 710 MHz). Outputs are configurable for various signal formats such as LVPECL, LVDS, HCSL, and CMOS, with independent supply voltages of 1.5, 1.8, 2.5, or 3.3 V per driver. It operates on a single core supply of 1.8, 2.5, or 3.3 V, features low phase jitter of 0.7 ps RMS typical, and is housed in a compact 4x4 mm QFN-24 package.

Feature Summary

• Four independent output drivers capable of synthesizing any frequency up to 710 MHz with 0 ppm accuracy.
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 standards.
• Flexible input options supporting external crystals, CMOS, SSTL/HSTL, and differential signals.
• Independent output voltage configuration (1.5V, 1.8V, 2.5V, 3.3V) and glitchless frequency adjustment.

Applications

• PCIe Gen 1/2/3/4 common clock and SRNS generation
• Ethernet switch and router timing
• Broadcast video and audio synchronization
• Processor and FPGA clocking systems

Procurement Notes

Verify the specific factory programming code associated with the B04266 suffix against the official Skyworks ordering guide. This suffix defines the unique frequency plan and register settings; it does not alter the electrical characteristics or pinout. Confirm that the GMR suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly processes.

Selection Notes

Select this component when replacing multiple discrete oscillators with a single programmable source. Ensure the required output frequencies fall within the 0.16 MHz to 710 MHz range. Verify that the target application can accommodate the I2C/SMBus programming interface or if pre-programmed NVM storage is required to retain settings across power cycles.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'C' typically denotes commercial temperature range (-40°C to +85°C), while 'B' indicates a specific factory-programmed frequency configuration. The 'GMR' suffix specifies the reel packaging format. It serves as a direct replacement for fixed-frequency crystal oscillators in high-speed digital designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When replacing discrete oscillators, ensure the new design accommodates the I2C control lines and that the power supply decoupling meets the recommended PCB land pattern guidelines for the 24-QFN package.