SI5338B-B03800-GMR

Overview

The SI5338B-B03800-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology for independent frequency synthesis on four 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 and features low phase jitter of 0.7 ps RMS typical. Configuration is managed via an I2C/SMBus interface, allowing precise frequency adjustments and spread spectrum capabilities within a compact 4x4 mm QFN-24 package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with zero ppm precision.
• 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 drivers support LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats with independent voltage levels.
• Features glitchless frequency adjustment in 1 ppm steps and independent phase adjustment with <20 ps accuracy.

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 ordering suffix B03800 against the manufacturer's current datasheet to confirm the exact pre-programmed frequency configuration and output pin assignments. Ensure the I2C pull-up voltage requirements are met if operating below 2.5 V. Confirm RoHS compliance status through official documentation before procurement.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies from a single source. Ensure the required output signal format (LVDS, LVPECL, etc.) and voltage levels match the driver capabilities. Verify that the input reference frequency falls within the supported ranges for the chosen input mode. Consider thermal resistance characteristics for PCB layout planning.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' suffix typically denotes a specific factory-programmed configuration variant within the series. The '-GMR' suffix indicates tape and reel packaging suitable for automated surface-mount assembly. It replaces discrete crystal oscillators in complex digital designs.

Replacement Considerations

Direct replacements must be sought from the Si5338 family with matching programming configurations. Generic clock generators may not offer the same MultiSynth flexibility or jitter performance. Verify pin compatibility and electrical specifications before substituting other Skyworks models like the Si5339 or Si534x series.