SI5338B-B08686-GM

Overview

The SI5338B-B08686-GM is a programmable quad clock generator utilizing Skyworks MultiSynth technology. It synthesizes four independent output clocks with zero ppm frequency accuracy from a single core supply of 1.8, 2.5, or 3.3 V. The device supports differential inputs up to 710 MHz and generates outputs ranging from 0.16 MHz to 710 MHz across LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats. Key electrical parameters include a typical core supply current of 45 mA, a maximum operating temperature of +85 °C, and a typical RMS phase jitter of 0.7 ps.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four output drivers with true zero ppm precision.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential signals (up to 710 MHz).
• Features low phase jitter of 0.7 ps RMS typ and glitchless frequency adjustments via independent increment/decrement pins.
• Configurable spread spectrum (SSC) allows modulation rates from 33 to 63 kHz with spreads between 0.5% and 5.0%.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant timing
• Ethernet switch/router clocking for 1 GbE and 10 GbE
• Processor and FPGA clock generation
• Broadcast video/audio timing systems

Procurement Notes

Verify the specific factory programming code B08686 against the official Skyworks ordering guide to confirm the exact output frequencies and formats. Confirm that the -GMR suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly processes.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies from a single package. Ensure the target application operates within the –40 °C to +85 °C temperature range and utilizes the appropriate I2C pull-up voltage compatible with the 1.8 V to 3.3 V logic levels.

Part Context

This part belongs to the Si5338 family of high-performance clock generators. The 'B' in the part number denotes a specific factory-programmed configuration of frequencies and output formats, while the '-GM' indicates the QFN-24 package type.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants such as SI5338A or SI5338J. However, these must be verified against the required output frequencies and signal formats defined by the B08686 configuration code.