SI5338F-B04076-GMR

Overview

The Skyworks SI5338F-B04076-GMR is a programmable quad clock generator utilizing MultiSynth technology to synthesize any frequency with zero ppm precision on four independent output drivers. It operates from a single core supply of 1.8, 2.5, or 3.3 V and supports flexible input references including external crystals (8–30 MHz), CMOS (up to 200 MHz), SSTL/HSTL (up to 350 MHz), and differential inputs (up to 710 MHz). The device features low phase jitter of 0.7 ps RMS typical, glitchless frequency adjustments, and spread spectrum capabilities. Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, HSTL, and CML formats with independent voltage levels.

Feature Summary

• MultiSynth™ Technology: Generates four independent clocks with 0 ppm precision using patented synthesis architecture.
• Flexible Input Support: Accepts external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential signals (5–710 MHz).
• Configurable Outputs: Supports up to four differential or eight single-ended outputs with independent voltage selection (1.5, 1.8, 2.5, or 3.3 V) and signal formats.
• Low Jitter Performance: Achieves typical random jitter of 0.7 ps RMS, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.

Applications

• Ethernet switch/router clocking
• PCIe Gen1/2/3/4 timing
• Processor and FPGA clock generation
• Broadcast video/audio timing
• Telecom line cards

Procurement Notes

Verify the specific ordering suffix B04076 against the manufacturer's official ordering guide to confirm the programmed frequency configuration and output pin assignments. Ensure the I2C pull-up voltage compatibility matches the system bus requirements, particularly if operating below 2.5 V. Confirm package type is 24-QFN (4x4 mm) and check moisture sensitivity level handling procedures during assembly.

Selection Notes

Select this component when zero ppm frequency accuracy and independent output voltage domains are required. Ensure the input reference frequency falls within the supported ranges for the desired output format. For high-frequency outputs above 350 MHz, verify that only two unique frequencies can be generated simultaneously due to VCO division constraints. Use ClockBuilder Pro software for configuration validation.

Part Context

The SI5338 series replaces multiple discrete crystal oscillators in complex digital systems. This specific part number represents a factory-programmed variant of the Si5338 family, designed for applications requiring precise clock distribution without field programming. It integrates PLL and MultiSynth stages into a compact QFN package to reduce board space and power consumption compared to discrete solutions.

Replacement Considerations

Direct replacements must match the 24-QFN footprint and support similar input/output voltage ranges. Verify that alternative devices offer comparable jitter performance (<1 ps RMS) and support the required output formats (LVPECL/LVDS/CMOS). Check for compatible I2C addressing and register maps if migrating to a different programmable clock generator family.