SI5338A-B10468-GMR

Overview

The SI5338A-B10468-GMR is a programmable quad clock generator utilizing MultiSynth technology. It synthesizes any frequency on four independent outputs with zero ppm precision. The device supports differential and single-ended formats including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL. Maximum output frequencies reach 710 MHz for differential pairs and 200 MHz for CMOS. It operates from a 1.8 V, 2.5 V, or 3.3 V core supply with a typical current of 45 mA. Jitter performance is characterized by 0.7 ps RMS random jitter. Configuration is managed via an I2C/SMBus interface.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with 0 ppm accuracy.
• Supports flexible input references: external crystals (8-30 MHz), CMOS (5-200 MHz), SSTL/HSTL (5-350 MHz), and differential inputs (5-710 MHz).
• Configurable output drivers support LVPECL/LVDS/CML up to 710 MHz, HCSL up to 250 MHz, and CMOS up to 200 MHz.
• Features independent phase adjustment (<20 ps steps) and glitchless frequency adjustments in 1 ppm steps.

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 solutions.
• Broadcast video/audio timing infrastructure.

Procurement Notes

Verify the specific ordering suffix B10468 against official Skyworks documentation to confirm factory programming parameters. The -GMR suffix indicates tape-and-reel packaging. Confirm RoHS compliance status through the manufacturer's latest product specification sheet prior to integration.

Selection Notes

Select this component when low-jitter synthesis across multiple disparate frequencies is required. Ensure the target output format matches the supported voltage levels (1.5 V, 1.8 V, 2.5 V, or 3.3 V). Validate that the input reference frequency falls within the specified ranges for the chosen driver type. Use ClockBuilder Pro software for configuration validation.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. It replaces discrete crystal oscillators and frequency translators. The device integrates a PLL and MultiSynth stages into a compact 4x4 mm QFN package. It is designed for high-performance timing applications requiring precise frequency generation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify pinout compatibility and electrical specifications before considering alternative devices from other manufacturers.

FAQ

What is the maximum input frequency for differential clocks?

The maximum input frequency for differential clocks on pins IN1/2 and IN5/6 is 710 MHz.

Can the device operate without an external crystal?

Yes, the Si5338 accepts CMOS, SSTL/HSTL, or differential clock inputs as reference sources, eliminating the need for an external crystal if a suitable clock signal is available.

How is frequency adjustment performed?

Frequency can be adjusted independently on each output using the I2C interface or hardware control pins (PINC/FINC) for glitchless adjustments in 1 ppm steps.