SI5338B-B05287-GMR

Overview

The SI5338B-B05287-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports differential and single-ended formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. The device operates with a core supply of 1.8 V, 2.5 V, or 3.3 V and accepts inputs up to 710 MHz. Key electrical parameters include a typical RMS jitter of 0.7 ps, a maximum output frequency of 710 MHz for differential outputs, and an operating temperature range of -40°C to +85°C.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis with zero ppm precision on four outputs.
• Supports flexible input references: external crystals (8-30 MHz), CMOS (5-200 MHz), SSTL/HSTL (5-350 MHz), and differential (5-710 MHz).
• Configurable output drivers support LVPECL/LVDS/CML up to 710 MHz, HCSL up to 250 MHz, and CMOS/SSTL/HSTL up to 350 MHz.
• Features glitchless frequency 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 timing.
• Ethernet switch/router and 1 GbE/10 GbE interfaces.
• Processor and FPGA clocking systems.
• Broadcast video/audio timing distribution.
• Telecom line cards and MSAN/DSLAM/PON equipment.

Procurement Notes

Verify the specific factory configuration code B05287 against the official Skyworks ordering guide to ensure correct output formats and frequencies. Confirm package type QFN-24 and tape-and-reel packaging suffix GMR. Check for RoHS compliance status and moisture sensitivity levels prior to procurement.

Selection Notes

Select this component when low-jitter (<0.7 ps RMS) multi-output clock generation is required. Ensure the target application voltage matches the available 1.8 V, 2.5 V, or 3.3 V core supply options. Verify that the required output signal formats (LVPECL, LVDS, etc.) are supported by the specific factory configuration.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces multiple discrete crystal oscillators with a single highly configurable IC. The device integrates PLL synthesis stages and output buffers within a compact 4x4 mm QFN package, designed for space-constrained high-performance digital systems.

Replacement Considerations

Direct pin-to-pin replacements within the Si5338 family include SI5338A, SI5338C, SI5338N, and SI5338Q variants. Substitution requires verifying that the replacement part's factory configuration matches the required output frequencies and signal formats. Software reprogramming via ClockBuilder Pro may be necessary if configurations differ.

FAQ

What is the maximum input frequency supported by the SI5338?

The device supports a maximum differential input frequency of 710 MHz. Single-ended CMOS inputs are limited to 200 MHz, while SSTL/HSTL inputs support up to 350 MHz.

Can the SI5338 perform glitch-free frequency changes?

Yes, the device features an independent frequency increment/decrement capability that allows glitchless frequency adjustments in 1 ppm steps.

What output formats are available for the four drivers?

Each output driver is independently configurable to support LVPECL, LVDS, CML, HCSL, CMOS, SSTL, or HSTL formats, allowing for mixed output configurations.