SI5338B-B09321-GM

Overview

The SI5338B-B09321-GM is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes any frequency up to 710 MHz on four independent output drivers with zero ppm precision. The device supports flexible input references including differential, single-ended, and crystal inputs. Outputs are configurable for LVPECL, LVDS, CML, HCSL, CMOS, SSTL, or HSTL formats. It operates from a 1.8 V, 2.5 V, or 3.3 V core supply with a typical current of 45 mA. Key features include low phase jitter (0.7 ps RMS typ), glitchless frequency/phase adjustments, spread spectrum capability, and I2C/SMBus programming.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with true zero ppm accuracy.
• Low phase jitter of 0.7 ps RMS typical; compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Highly-configurable outputs support LVPECL/LVDS/CML (up to 710 MHz), HCSL (up to 250 MHz), and CMOS/SSTL/HSTL formats.
• Independent frequency increment/decrement and phase adjustment capabilities with glitchless operation.

Applications

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

Procurement Notes

Verify the specific factory-programmed configuration associated with the B09321 suffix against the system requirements. Confirm that the QFN-24 package dimensions and thermal characteristics meet the PCB layout constraints. Ensure the I2C pull-up voltage levels align with the controller interface specifications.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single source. Verify that the desired output signal formats (LVPECL, LVDS, etc.) and maximum frequencies (up to 710 MHz) fall within the supported ranges. Check if the glitchless frequency adjustment feature is necessary for the application's dynamic timing needs.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and buffers. The 'B' in the part number indicates a specific factory-programmed NVM configuration. The '-GM' suffix denotes the 24-lead QFN package type.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different NVM configurations (e.g., SI5338A-Bxxxxx-GM). Ensure the replacement part has the identical frequency and format programming as the original design requires.