SI5338C-B10489-GMR

Overview

The SI5338C-B10489-GMR is a programmable quad clock generator from Skyworks Solutions, utilizing MultiSynth technology to synthesize any frequency on four independent output drivers. It supports differential and single-ended outputs with configurable voltage levels (1.5V, 1.8V, 2.5V, or 3.3V). The device operates from a single core supply of 1.8V, 2.5V, or 3.3V, drawing a typical current of 45 mA. Key electrical parameters include a maximum input frequency of 710 MHz, a maximum output frequency of 710 MHz for LVDS/LVPECL formats, and a typical phase jitter of 0.7 ps RMS. It is housed in a 24-lead QFN package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with 0 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 selection per driver.
• Features glitchless frequency adjustments in 1 ppm steps and independent phase adjustment with <20 ps accuracy.

Applications

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

Procurement Notes

Verify the specific factory configuration code B10489 against the official Skyworks ordering guide to ensure correct pre-programmed frequencies and settings. Confirm that the GMR suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly processes.

Selection Notes

Select this component when replacing multiple discrete oscillators with a single low-jitter programmable source. Ensure the required output signal formats (LVDS, LVPECL, etc.) and voltage levels are supported by the Si5338's configurable output buffers. Validate that the input reference frequency falls within the specified ranges for the chosen input pin type.

Part Context

This part belongs to the Si5338 family of I2C-programmable clock generators. The 'C' typically denotes commercial temperature range (-40°C to +85°C), while 'B10489' specifies the unique factory programming configuration. The 'GMR' suffix indicates RoHS compliance and reel packaging.

Replacement Considerations

Direct pin-to-pin replacements within the same family may include other Si5338 variants with different factory configurations (e.g., SI5338C-Bxxxxx-GMR). Verify that the substitute part has the identical pre-programmed frequency set if drop-in replacement without reprogramming is required.