SI5338Q-B04142-GMR

Application Specific Clock/Timing Overview

The SI5338Q-B04142-GMR is an I2C-programmable quad clock generator from Skyworks Solutions. It utilizes MultiSynth technology to synthesize any frequency with zero ppm accuracy on four independent output drivers. The device supports a wide range of input references, including external crystals (8–30 MHz), CMOS (up to 200 MHz), and differential inputs (up to 710 MHz). Output formats include LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL, with individual supply voltages of 1.5, 1.8, 2.5, or 3.3 V per driver. Key electrical parameters include a typical phase jitter of 0.7 ps RMS, a core supply current of 45 mA, and operation within a temperature range of –40 to +85 °C.

Application Specific Clock/Timing Feature Summary

• MultiSynth™ technology enables independent, any-frequency synthesis on four differential output drivers with true zero ppm precision.
• Low phase jitter performance of 0.7 ps RMS typ, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Highly configurable output drivers supporting up to four differential outputs, eight single-ended outputs, or mixed configurations.
• Independent frequency increment/decrement feature allows glitchless adjustments in 1 ppm steps, with independent phase adjustment accuracy <20 ps.

Application Specific Clock/Timing Applications

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

Application Specific Clock/Timing Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm factory programming details, as these define the fixed frequency and configuration parameters. Ensure compatibility with the required I2C bus voltage levels, noting that pull-up voltages between 1.71 V and 3.63 V are supported. Confirm package handling requirements for the 24-QFN form factor during assembly.

Application Specific Clock/Timing Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies from a single IC, replacing discrete oscillators. Consider the available input reference types (crystal vs. external clock) and the required output signal formats (LVDS, LVPECL, CMOS, etc.). Evaluate power consumption needs, as the core supply current is typically 45 mA, and ensure the thermal design accommodates the junction-to-ambient resistance of 37 °C/W in still air.

Application Specific Clock/Timing Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'Q' suffix typically denotes a specific frequency range or output configuration variant within the series, while 'GMR' indicates the reel packaging format. The device is designed to replace multiple crystal oscillators, reducing board space and simplifying clock distribution networks in high-performance digital systems.

Application Specific Clock/Timing Replacement Considerations

Direct replacements within the same family include other Si5338 variants such as SI5338B or SI5338K, depending on the required maximum input/output frequency and specific output drive configurations. Verify that the substitute part number matches the necessary frequency plan and output voltage levels, as factory-programmed variants are not functionally interchangeable without reprogramming.