SI5338B-B09791-GM

Overview

The SI5338B-B09791-GM is a factory-programmed, I2C-compatible quad clock generator from Skyworks Solutions. It utilizes MultiSynth technology to synthesize four independent output clocks with zero ppm frequency accuracy. The device supports a maximum output frequency of 350 MHz and accepts differential inputs up to 710 MHz. Key electrical parameters include a typical phase jitter of 0.7 ps RMS, a core supply voltage range of 1.71 V to 3.63 V, and an operating temperature range of -40 °C to +85 °C. It is housed in a compact 4 x 4 mm QFN-24 package.

Feature Summary

• Factory-programmed NVM configuration for immediate operation without external programming.
• MultiSynth technology enables independent, any-frequency synthesis on four outputs with true zero ppm precision.
• Low phase jitter performance of 0.7 ps RMS typ across all outputs.
• Supports flexible input references including external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential signals.

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 and audio timing distribution.

Procurement Notes

Verify the specific factory-programmed frequency settings against the target design requirements, as the internal NVM configuration is fixed at the time of manufacture. Confirm that the 350 MHz maximum output frequency aligns with the system's clocking needs. Ensure the I2C interface voltage levels are compatible with the host controller before integration.

Selection Notes

Select this model when a fixed, pre-configured clock solution is preferred over field-programmable alternatives. The 'B' suffix indicates a maximum output frequency limit of 350 MHz; choose the 'A' variant if frequencies up to 710 MHz are required. Verify that the single-ended or differential output formats meet the load requirements of the destination devices.

Part Context

This component belongs to the Si5338 family of I2C-programmable clock generators. The specific ordering suffix determines the factory-programmed frequencies and output configurations stored in the non-volatile memory. This part number represents a customized version of the standard Si5338 architecture tailored for specific frequency plans.

Replacement Considerations

Direct replacement requires matching the factory-programmed frequencies and output formats. Generic Si5338 variants may require reprogramming via ClockBuilder Pro software. Verify pinout compatibility and ensure the replacement part supports the required output voltage levels (1.5 V, 1.8 V, 2.5 V, or 3.3 V).