SI5338K-B05046-GM

Overview

The SI5338K-B05046-GM is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology for independent frequency synthesis. It features four output drivers capable of LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats. The device supports input frequencies up to 710 MHz and outputs up to 710 MHz (LVPECL/LVDS/CML) or 350 MHz (SSTL/HSTL). Key electrical parameters include a typical core supply current of 45 mA, operating voltage range of 1.71 V to 3.63 V, and a typical phase jitter of 0.7 ps RMS. It operates within a temperature range of -40 °C to +85 °C in a 24-lead QFN package.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm precision.
• 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 output drivers support various signal formats: LVPECL/LVDS/CML up to 710 MHz, HCSL up to 250 MHz, and CMOS/SSTL/HSTL up to 350 MHz.
• 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

Procurement Notes

Verify the specific factory programming configuration associated with the B05046 suffix against the target design requirements. Confirm that the I2C/SMBus interface compatibility matches the system controller. Ensure the 24-QFN thermal characteristics are adequate for the intended ambient temperature conditions.

Selection Notes

Select this component when low jitter (0.7 ps typ) and zero ppm frequency accuracy are required across multiple independent outputs. Consider the available output voltage options (1.5, 1.8, 2.5, or 3.3 V) per driver to match load requirements. Verify that the input reference source aligns with the supported frequency ranges for crystal, single-ended, or differential inputs.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'K' suffix typically denotes specific pin control configurations or output enable logic distinct from other variants like 'B' or 'Q'. The 'GM' indicates a lead-free, halogen-free RoHS-compliant package. It replaces discrete oscillators by synthesizing any frequency on each of the four outputs.

Replacement Considerations

Direct replacements must be sought from the Si5338 family with matching output count and frequency capabilities. Verify if alternative suffixes (e.g., SI5338B, SI5338Q) offer identical pinouts and functional behavior, noting that ordering suffixes may alter internal programming or control logic rather than physical compatibility.