SI5338A-B09344-GMR

Overview

The SI5338A-B09344-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports input frequencies up to 710 MHz and generates outputs ranging from 0.16 MHz to 710 MHz depending on the selected format (LVPECL, LVDS, HCSL, CMOS, etc.). The device operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V with a typical current consumption of 45 mA. It features low phase jitter of 0.7 ps RMS typ, zero ppm frequency accuracy, and glitchless frequency adjustments via I2C/SMBus interface.

Feature Summary

• MultiSynth™ Technology: Enables independent, any-frequency synthesis on four differential output drivers with 0 ppm precision.
• Low Jitter Performance: Achieves typical RMS phase jitter of 0.7 ps, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Flexible Input/Output: Supports external crystals (8-30 MHz), CMOS (5-200 MHz), SSTL/HSTL (5-350 MHz), and differential inputs (5-710 MHz). Outputs support LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats.
• Programmability: Features independent output voltage selection (1.5, 1.8, 2.5, or 3.3 V), spread spectrum generation, and glitchless frequency/phase adjustments via I2C/SMBus.

Applications

• PCIe Gen 1/2/3/4 systems
• Ethernet switch/router clocking
• Processor and FPGA clocking
• Broadcast video/audio timing
• Telecom line cards

Procurement Notes

Verify the specific ordering suffix 'GMR' indicates tape-and-reel packaging when sourcing components. Confirm that the 'B' variant corresponds to the standard Si5338 specifications provided in the datasheet. Ensure compatibility with the I2C bus voltage levels (1.71 V to 3.63 V) required for programming. Check for RoHS compliance status as indicated in official manufacturer documentation.

Selection Notes

Select this component when designing systems requiring four independent clock signals with precise frequency synthesis and low jitter. Ensure the target application supports the required input reference types (crystal, CMOS, or differential). Verify that the output driver formats (LVPECL, LVDS, etc.) match the load requirements of the destination devices. Consider the operating temperature range of -40°C to +85°C for environmental suitability.

Part Context

The SI5338A-B09344-GMR belongs to the Si5338 family of high-performance, low-jitter clock generators. This series replaces multiple discrete crystal oscillators with a single programmable IC. The 'A' designation typically refers to the specific performance grade or feature set within the Si5338 lineup, while 'B' may denote a specific revision or configuration option defined by Skyworks Solutions.

Replacement Considerations

Direct pin-to-pin replacements within the same package (QFN-24) should be verified against the full Si5338 family datasheet. Ensure that any substitute part supports the same maximum input/output frequencies and jitter specifications. Programming software compatibility (ClockBuilder Pro) should be confirmed for new parts.