SI5338C-B05278-GMR

Overview

The SI5338C-B05278-GMR is a 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 differential and single-ended outputs, including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats. It operates from a single core supply of 1.8 V, 2.5 V, or 3.3 V and features low phase jitter of 0.7 ps RMS typical. Configuration is performed 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 various signal formats and independent supply voltages (1.5, 1.8, 2.5, or 3.3 V).
• Features glitchless frequency adjustments in 1 ppm steps and independent phase adjustment with <20 ps resolution.

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 factory programming configuration associated with the B05278 suffix against the design requirements using ClockBuilder Pro software. Confirm that the QFN-24 package dimensions and thermal characteristics meet the PCB layout constraints for the target application environment.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single IC. Ensure the input reference source matches the supported frequency ranges and signal types. Verify that the output voltage levels and drive strengths align with the load requirements of the destination devices.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'C' indicates commercial temperature range operation (-40°C to +85°C), while the 'GMR' suffix denotes tape and reel packaging. The device replaces discrete crystal oscillators and frequency translators in complex digital systems.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different factory programming configurations. Verify that alternative part numbers support the required output formats and frequencies before substitution.