SI5338N-B05684-GMR

Overview

The SI5338N-B05684-GMR 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 flexible input references, including external crystals (8–30 MHz), CMOS (up to 200 MHz), and differential inputs (up to 710 MHz). Outputs are configurable for various formats such as LVPECL, LVDS, HCSL, and CMOS, with independent voltage levels of 1.5, 1.8, 2.5, or 3.3 V. Key electrical parameters include a core supply voltage range of 1.71 V to 3.63 V, typical operating current of 45 mA, and low phase jitter of 0.7 ps RMS.

Feature Summary

• MultiSynth™ Technology: Enables independent, any-frequency synthesis on four differential output drivers with true zero ppm accuracy.
• Flexible Input Support: Accepts external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz).
• Configurable Outputs: Supports LVPECL/LVDS (up to 710 MHz), HCSL (up to 250 MHz), CMOS (up to 200 MHz), and SSTL/HSTL (up to 350 MHz) with independent driver voltages.
• Glitchless Frequency Adjustment: Features independent frequency increment/decrement in 1 ppm steps and phase adjustment with <20 ps accuracy.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant systems
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards and Fibre Channel/SAN

Procurement Notes

Verify the specific ordering suffix B05684 against the manufacturer's official documentation to confirm the pre-configured frequency plan and pinout settings. Ensure compatibility with the I2C/SMBus interface voltage levels (1.71 V to 3.63 V) and check for moisture sensitivity handling requirements during storage and assembly.

Selection Notes

Select this component when replacing multiple discrete oscillators with a single programmable source. Ensure the required output frequencies fall within the supported ranges for the chosen signal format (e.g., LVDS up to 710 MHz). Verify that the system can accommodate the 4x4 mm QFN-24 package and that the I2C programming tool (ClockBuilder Pro) is available for configuration.

Part Context

The SI5338 series is part of Skyworks' MultiSynth family of low-jitter clock generators. This specific model integrates four output drivers capable of high-performance frequency synthesis. It is designed to reduce board space and power consumption compared to using multiple fixed-frequency crystal oscillators.

Replacement Considerations

Direct replacements must match the 24-QFN package and support similar output configurations. Check datasheets for equivalent devices offering I2C programmability and comparable jitter performance (sub-1 ps RMS). Verify that alternative parts support the same input reference types and output voltage levels.