SI5338B-B09791-GMR

Overview

The SI5338B-B09791-GMR is an I2C-programmable quad clock generator utilizing MultiSynth technology. It synthesizes any frequency with zero ppm accuracy on four independent outputs, supporting formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. The device operates from a single core supply of 1.8 V, 2.5 V, or 3.3 V and accepts differential inputs up to 710 MHz. It features low phase jitter (0.7 ps RMS typ), configurable spread spectrum, and independent glitchless frequency/phase adjustments in a 4x4 mm QFN-24 package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with true zero ppm accuracy.
• Supports flexible input references: external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential (5–710 MHz).
• Highly-configurable output drivers support LVPECL/LVDS (up to 710 MHz), HCSL (up to 250 MHz), CMOS (up to 200 MHz), and SSTL/HSTL (up to 350 MHz).
• Features independent frequency increment/decrement for glitchless adjustments in 1 ppm steps and phase adjustment with <20 ps accuracy.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant timing
• Ethernet switch/router clocking
• Processor and FPGA clocking
• Broadcast video/audio timing

Procurement Notes

Verify the specific factory configuration encoded in the B09791 suffix against system requirements using Skyworks ClockBuilder Pro software. Confirm that the GMR tape-and-reel packaging aligns with automated assembly processes. Ensure the selected output voltage levels (1.5 V, 1.8 V, 2.5 V, or 3.3 V) match the target receiver specifications.

Selection Notes

Select this component when designing systems requiring multiple distinct clock frequencies from a single source without discrete oscillators. Ensure the required output format (LVDS, LVPECL, etc.) and frequency range are supported by the specific output driver configuration. Verify that the input reference signal meets the amplitude and slew rate requirements for optimal jitter performance.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' suffix indicates a specific factory-programmed configuration variant within the series. The 'GMR' suffix denotes the reel packaging option for surface-mount assembly. The device replaces multiple fixed-frequency crystal oscillators and level translators.

Replacement Considerations

Direct pin-to-pin replacements within the Si5338 family require identical NVM configurations. Verify that alternative SKUs provide the same output frequencies and formats. Cross-reference with Si5334 or Si5335 series only if programmability is not required and fixed frequencies suffice.