SI5338C-B05411-GMR

Overview

The SI5338C-B05411-GMR is a programmable quad clock generator 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 from a 1.8 V, 2.5 V, or 3.3 V core supply with a typical current of 45 mA. It achieves low phase jitter of 0.7 ps RMS and offers flexible input references up to 710 MHz. Encased in a 4x4 mm QFN-24 package, it provides glitchless frequency adjustments and spread spectrum capabilities.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with zero ppm precision.
• Low phase jitter of 0.7 ps RMS typ for high-performance timing applications.
• Flexible input reference options: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz).
• Highly configurable outputs supporting LVPECL/LVDS (up to 710 MHz), HCSL (up to 250 MHz), CMOS (up to 200 MHz), and SSTL/HSTL (up to 350 MHz).

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant systems.
• Ethernet switch/router and 1 GbE/10 GbE networking equipment.
• Processor and FPGA clocking solutions.
• Broadcast video/audio timing infrastructure.

Procurement Notes

Verify the specific factory configuration code B05411 against the official Skyworks ordering guide to ensure correct pre-programmed frequencies and output formats. Confirm that the -GMR suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly processes.

Selection Notes

Select this component when replacing multiple discrete oscillators with a single programmable source. Ensure the required output voltage levels (1.5, 1.8, 2.5, or 3.3 V) match the load requirements. Validate that the input reference frequency falls within the supported ranges for the desired output format and jitter performance.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'C' typically denotes a specific commercial temperature range or grade, while 'B05411' represents the unique factory programming configuration. The '-GMR' suffix designates the reel packaging format for mass production.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different factory configurations. Verify that alternative part numbers support the exact same output formats and frequency requirements without requiring schematic changes.

FAQ

What is the maximum input frequency supported by the SI5338?

The device supports differential inputs up to 710 MHz, SSTL/HSTL inputs up to 350 MHz, CMOS inputs up to 200 MHz, and external crystals between 8 and 30 MHz.

Can the output frequencies be adjusted without glitches?

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

What is the typical phase jitter performance?

The Si5338 provides a typical phase jitter of 0.7 ps RMS, making it suitable for demanding applications like PCIe Gen 3/4 and high-speed serial links.