SI5338A-B02499-GM

Overview

The SI5338A-B02499-GM is an I2C-programmable quad clock generator utilizing MultiSynth technology for independent, any-frequency synthesis on four output drivers. It supports differential and single-ended outputs with frequencies up to 710 MHz. The device features a typical phase jitter of 0.7 ps RMS and allows true zero ppm frequency accuracy. It operates from a single core supply of 1.8 V, 2.5 V, or 3.3 V and includes configurable spread spectrum capabilities. The component is housed in a compact 4 x 4 mm, 24-lead QFN package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with 0 ppm precision.
• Low phase jitter of 0.7 ps RMS typ across LVPECL, LVDS, HCSL, and CMOS formats.
• Flexible input reference options including external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential inputs up to 710 MHz.
• Highly configurable spread spectrum (SSC) on any output with frequency from 5 to 350 MHz and spread from 0.5 to 5.0%.

Applications

• Ethernet switch/router
• PCIe Gen1/2/3/4
• Processor and FPGA clocking
• Telecom line cards
• Fibre Channel, SAN

Procurement Notes

Verify the specific factory-programmed configuration associated with the B02499 suffix against the target design requirements. Confirm that the 24-QFN package dimensions align with the PCB land pattern specifications provided in the datasheet. Ensure I2C pull-up voltages are compatible with the selected core supply voltage.

Selection Notes

Select this model when independent frequency synthesis on all four outputs is required without cross-coupling constraints. Verify that the desired output signal formats (LVPECL, LVDS, HCSL, CMOS, etc.) fall within the specified frequency ranges for each driver. Check that the input reference source matches one of the supported flexible input types.

Part Context

This part belongs to the Si5338 family of low-jitter clock generators. It replaces multiple discrete crystal oscillators by providing four independent clock signals from a single IC. The device integrates programmable PLLs and output buffers into a space-saving QFN package suitable for high-density designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Evaluate other Si533x variants based on pin compatibility and output count requirements.

FAQ

What is the maximum input frequency supported by the Si5338?

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

Can the output voltage levels be configured independently?

Yes, each output driver supports independent voltage configurations of 1.5 V, 1.8 V, 2.5 V, or 3.3 V via the VDDO pins.

Is glitchless frequency adjustment supported?

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