SI5338C-B05078-GMR

Overview

The SI5338C-B05078-GMR is an I2C-programmable quad clock generator from Skyworks Solutions. It utilizes MultiSynth technology to synthesize any frequency on four independent output drivers with zero ppm precision. The device supports flexible input references including external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential inputs up to 710 MHz. Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats, each with independent voltage levels of 1.5, 1.8, 2.5, or 3.3 V. Key electrical parameters include a core supply voltage range of 1.71–3.63 V, typical operating current of 45 mA, and low phase jitter of 0.7 ps RMS. It operates within a temperature range of –40 to +85 °C in a 24-lead QFN package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm accuracy.
• Flexible input support: External crystal (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential (5–710 MHz).
• Configurable outputs support LVPECL/LVDS (up to 710 MHz), HCSL (up to 250 MHz), CMOS (up to 200 MHz), and SSTL/HSTL (up to 350 MHz).
• Independent output voltage selection per driver: 1.5, 1.8, 2.5, or 3.3 V.

Applications

• PCIe Gen 1/2/3/4 common clock and Gen 3 SRNS compliant timing.
• Ethernet switch/router and 1 GbE/10 GbE applications.
• Processor and FPGA clocking systems.
• Broadcast video/audio timing distribution.
• MSAN/DSLAM/PON and Fibre Channel/SAN interfaces.

Procurement Notes

Verify the specific factory configuration code embedded in the suffix B05078 against the official Skyworks ordering guide to ensure correct frequency and format settings. Confirm that the GMR suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly. Cross-reference the RoHS compliance status and moisture sensitivity level requirements with your manufacturing process specifications before procurement.

Selection Notes

Select this component when replacing multiple discrete oscillators with a single programmable source. Ensure the required output frequencies fall within the supported ranges for the chosen signal format (e.g., LVDS up to 710 MHz vs. CMOS up to 200 MHz). Verify that the target system's I2C bus voltage is compatible with the device's I2C interface specifications. Consider the thermal resistance characteristics if high output loading is expected.

Part Context

This part belongs to the Si5338 family of low-jitter clock generators. The 'C' typically denotes commercial temperature grade (-40 to +85 °C), while 'B' indicates a specific factory pre-configuration. The 'GMR' suffix specifies green tape-and-reel packaging. This model replaces discrete crystal oscillators and acts as a frequency translator or buffer in complex digital systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Replacement requires matching the specific factory configuration code (B05078) or reprogramming a generic Si5338 variant using ClockBuilder Pro software to replicate the exact frequency and format settings.