SI5338K-B10419-GM

Overview

The SI5338K-B10419-GM is an I2C-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 a core supply of 1.8, 2.5, or 3.3 V and operates within a temperature range of –40 to +85 °C. Key electrical parameters include a maximum input frequency of 710 MHz, typical phase jitter of 0.7 ps RMS, and a typical core supply current of 45 mA. It is housed in a compact 4 x 4 mm QFN-24 package.

Feature Summary

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

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant systems.
• Ethernet switch/router timing.
• Processor and FPGA clocking.
• Broadcast video/audio timing.
• Telecom line cards and MSAN/DSLAM/PON applications.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm factory programming details and pin configuration. Ensure compatibility with the I2C bus voltage levels, noting that writes to register 27 may be required if the I2C pull-up voltage is below 2.5 V. Confirm thermal management requirements based on the junction-to-ambient thermal resistance of 37 °C/W in still air conditions.

Selection Notes

Select this component when low jitter synthesis is critical for high-speed interfaces like PCIe or Ethernet. The device allows independent output voltage selection (1.5, 1.8, 2.5, or 3.3 V) per driver, facilitating level translation without external components. Consider the 0.7 ps RMS typical jitter specification for sensitive analog or high-speed digital applications requiring precise clock alignment.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'K' suffix typically denotes specific hardware revisions or pin control configurations within the series, while the numeric code indicates factory-programmed NVM settings. The device replaces multiple discrete oscillators, reducing board space and power consumption in complex timing architectures.

Replacement Considerations

Direct replacements within the same family include other Si5338 variants such as SI5338B, SI5338C, or SI5338Q series parts. Verify that alternative models support the required output frequencies and formats, particularly if differential outputs above 350 MHz are needed, as some variants may have different frequency limits or jitter specifications.