SI5338B-B04857-GMR

Overview

The SI5338B-B04857-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology for independent frequency synthesis on four output drivers. It supports any frequency up to 710 MHz with zero ppm precision and features low phase jitter of 0.7 ps RMS typical. The device accepts various input references including differential clocks up to 710 MHz and single-ended CMOS/SSTL/HSTL inputs. Outputs are configurable for LVPECL, LVDS, CML, HCSL, CMOS, SSTL, or HSTL formats with independent supply voltages. It operates on a single core supply of 1.8 V, 2.5 V, or 3.3 V within a 24-lead QFN package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm precision.
• Low phase jitter performance of 0.7 ps RMS typical, compliant with PCIe Gen 1/2/3/4 Common Clock standards.
• Flexible input reference options including external crystals (8–30 MHz), CMOS (5–200 MHz), and differential inputs (up to 710 MHz).
• Configurable output drivers supporting LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats with independent voltage levels.

Applications

• PCIe Gen 1/2/3/4 common clock generation
• Ethernet switch and router timing
• Processor and FPGA clocking
• Broadcast video/audio timing systems

Procurement Notes

Verify the specific ordering suffix B04857 against the manufacturer's official documentation to confirm the exact pre-programmed configuration, as this suffix defines the factory-set parameters. Ensure compatibility with I2C programming tools like ClockBuilder Pro if field reconfiguration is required. Check for RoHS compliance status in the latest datasheet revision.

Selection Notes

Select this component when designing systems requiring multiple independent clock frequencies with high precision and low jitter. Ensure the target application supports the required output voltage levels (1.5 V, 1.8 V, 2.5 V, or 3.3 V) per driver. Verify that the input reference signal matches one of the supported formats, such as differential LVDS/LVPECL or single-ended CMOS/SSTL/HSTL.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' in the part number typically denotes a specific output format or configuration variant within the series. The '-GMR' suffix indicates it is supplied in a tape and reel packaging format suitable for automated surface-mount assembly processes.

Replacement Considerations

Direct replacements must be sought from the Si5338 family with matching output configurations. Verify pin-to-pin compatibility and electrical specifications, particularly jitter performance and output drive capabilities, before substituting other clock generator models.