SI5338A-B05709-GM

Overview

The SI5338A-B05709-GM 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 a wide range of input references, including differential clocks up to 710 MHz and single-ended inputs up to 350 MHz. Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats, each independently powered at 1.5, 1.8, 2.5, or 3.3 V. It operates from a single core supply (1.8, 2.5, or 3.3 V) with typical current consumption of 45 mA. Key electrical parameters include a typical phase jitter of 0.7 ps RMS and a maximum output frequency of 710 MHz.

Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm accuracy.
• Supports PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliance.
• Flexible input reference options: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz).
• Independent output voltage per driver: 1.5, 1.8, 2.5, or 3.3 V.

Applications

• PCIe Gen1/2/3/4 systems
• Ethernet switch/router timing
• Processor and FPGA clocking
• Broadcast video/audio timing

Procurement Notes

Verify the specific ordering suffix B05709 against the official Skyworks Si5338 datasheet to confirm factory programming settings. Confirm package type is 24-lead QFN and check RoHS compliance status. Ensure I2C pull-up voltages match system requirements, as compatibility adjustments may be needed for bus voltages below 2.5 V.

Selection Notes

Select this component when low-jitter (< 0.7 ps RMS typ) and high-precision frequency synthesis are required for multiple disparate clock domains. Ensure the application supports the 4x4 mm QFN-24 package constraints. Verify that the required output formats (LVPECL, LVDS, etc.) align with the independent voltage domain capabilities of the four output drivers.

Part Context

The SI5338 series replaces multiple discrete oscillators in complex digital systems. This specific part number represents a factory-programmed variant within the Si5338 family, designed for applications requiring specific frequency sets without user-side configuration. It shares the same pinout and functional architecture as other Si5338 variants but differs in pre-loaded NVM data.

Replacement Considerations

Direct replacements must be from the Si5338 family with matching factory programming. Generic programmable Si5338 units require reprogramming via ClockBuilder Pro software. Verify that substitute parts maintain the same output drive strengths and jitter performance specifications for the target application frequencies.