SI5338A-B04974-GMR

Overview

The SI5338A-B04974-GMR is a programmable 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 frequencies up to 710 MHz. The device operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V, with individual output buffer supplies configurable between 1.5 V and 3.3 V. Key electrical parameters include a typical phase jitter of 0.7 ps RMS, a maximum input frequency of 710 MHz, and an operating temperature range of -40 °C to +85 °C. It is housed in a 24-lead QFN package.

Feature Summary

• MultiSynth™ technology enables zero ppm precision frequency synthesis on four independent outputs.
• Supports flexible input references including external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz).
• Configurable output formats include LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL with independent voltage levels per driver.
• Features glitchless frequency adjustments via independent increment/decrement and phase adjustment capabilities.

Applications

• PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS compliant systems
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• Processor and FPGA clocking solutions
• Fibre Channel and SAN applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm pinout compatibility and factory configuration. Confirm that the I2C pull-up voltage requirements align with the system bus voltage, particularly if operating below 2.5 V. Ensure ESD protection measures are adequate given the device sensitivity.

Selection Notes

Select this component when low jitter performance under 1 ps RMS is required for high-speed serial links. Verify that the desired output frequencies fall within the supported ranges for the chosen signal format (e.g., LVDS up to 710 MHz vs. CMOS up to 200 MHz). Check thermal resistance specifications if multiple outputs are active at high frequencies.

Part Context

This part belongs to the Si5338 family of quad clock generators. The 'A' designation typically indicates the 710 MHz performance variant. The 'B' suffix often denotes specific factory programming or pinout variations compared to other letters in the series. The '-GMR' suffix indicates tape and reel packaging for surface-mount assembly.

Replacement Considerations

Consult the official Skyworks replacement matrix for verified substitutes. Generic clock generators may not support the same MultiSynth architecture or jitter performance metrics. Ensure any alternative device matches the 24-QFN footprint and I2C interface requirements.