SI5338B-B11486-GMR

Overview

The SI5338B-B11486-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 of 1.5, 1.8, 2.5, or 3.3 V per driver. It operates on a single core supply of 1.8, 2.5, or 3.3 V, draws 45 mA typical current, and is housed in 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 and Gen 3 SRNS standards.
• Flexible input reference options: external crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential (5–710 MHz).
• Independent output voltage selection per driver (1.5, 1.8, 2.5, or 3.3 V) and support for glitchless frequency adjustments via I2C.

Applications

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

Procurement Notes

Verify the specific factory configuration code B11486 against the official Skyworks ordering guide to ensure correct pre-programmed frequencies and output formats. Confirm that the GMR suffix indicates tape-and-reel packaging suitable for automated assembly. Check for RoHS compliance status as indicated in the datasheet documentation.

Selection Notes

Select this component when designing systems requiring four independent clock signals with precise frequency accuracy and low jitter. Ensure the required output voltage levels match the available driver supplies (1.5V–3.3V). Verify that the input reference source falls within the supported frequency ranges for the chosen input type (differential vs. single-ended).

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'B' in the part number typically denotes a specific factory-programmed configuration variant within the series. The 'GMR' suffix indicates it is supplied in a reel format for surface-mount technology (SMT) production lines.

Replacement Considerations

Direct pin-to-pin replacements within the same package may include other Si5338 variants such as SI5338A or SI5338Q, provided their pre-programmed configurations meet the design requirements. Always verify electrical parameters like jitter and output drive strength before substitution.