SI5338C-B05660-GM

Overview

The SI5338C-B05660-GM 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 outputs with formats including LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL. The device operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, with individual output supplies configurable from 1.5 V to 3.3 V. It features low phase jitter of 0.7 ps RMS typical, zero ppm frequency accuracy, and an I2C/SMBus interface for configuration.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with 0 ppm precision.
• 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 various signal formats (LVPECL, LVDS, CML, HCSL, CMOS, SSTL, HSTL) and independent voltage levels (1.5, 1.8, 2.5, or 3.3 V).
• Includes 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 systems
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing

Procurement Notes

Verify the specific ordering suffix B05660 against the manufacturer's current ordering guide to confirm pinout, package type, and factory programming settings. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Check for any product change notifications that may affect availability or specifications.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies with low jitter and flexible output formats. Ensure the required input reference frequency falls within the supported ranges (up to 710 MHz for differential inputs). Verify that the target output frequencies and formats (e.g., LVDS vs. CMOS) are compatible with the Si5338C variant's capabilities. Use ClockBuilder Pro software for configuration.

Part Context

The SI5338C-B05660-GM belongs to the Si5338 family of I2C-programmable clock generators. This family replaces multiple crystal oscillators with a single IC capable of generating up to four independent clocks. The 'C' designation typically indicates specific performance or feature sets within the series, while the suffix defines factory programming and packaging details.

Replacement Considerations

Direct replacements must be sought from the Si5338 family. Verify compatibility of output formats, supply voltages, and jitter specifications. Software reconfiguration using ClockBuilder Pro will likely be necessary if substituting with another Si5338 variant due to different factory presets.

FAQ

What is the maximum input frequency supported by the SI5338C?

The SI5338C supports differential inputs up to 710 MHz, SSTL/HSTL inputs up to 350 MHz, and CMOS inputs up to 200 MHz.

Can the output supply voltages be different from the core supply voltage?

Yes, each output driver has an independent supply voltage (VDDOx) that can be configured to 1.5 V, 1.8 V, 2.5 V, or 3.3 V, separate from the core supply (1.8 V, 2.5 V, or 3.3 V).

Does the device support spread spectrum clocking?

Yes, the Si5338C supports highly configurable spread spectrum on any output, with frequency deviation from 0.5% to 5.0% and modulation rates from 33 kHz to 63 kHz.