SI5338C-B04171-GMR

Overview

The SI5338C-B04171-GMR is an I2C-programmable quad clock generator from Skyworks Solutions. It synthesizes any frequency on four output drivers using MultiSynth technology, achieving zero ppm precision. The device supports flexible input references including external crystals (8–30 MHz), CMOS (up to 200 MHz), and differential inputs (up to 710 MHz). Outputs are independently configurable for formats such as LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL with supply voltages of 1.5, 1.8, 2.5, or 3.3 V. It operates on a single core supply of 1.8, 2.5, or 3.3 V, draws 45 mA typically, and functions within a temperature range of –40 to +85 °C in a 24-QFN package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with 0 ppm accuracy.
• Low phase jitter 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), and differential (5–710 MHz).
• Independent output voltage per driver (1.5, 1.8, 2.5, or 3.3 V) and glitchless frequency adjustments via I2C/SMBus interface.

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm configuration details. Ensure compatibility with the I2C bus voltage levels, noting that registers may require adjustment if the bus voltage is below 2.5 V. Confirm thermal management requirements for the 24-QFN package under maximum load conditions.

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., up to 710 MHz for LVDS/LVPECL). Verify that the system can accommodate the 4 x 4 mm QFN footprint and that the I2C programming tool (ClockBuilder Pro) is available for configuration.

Part Context

This part belongs to the Si5338 family of low-jitter clock generators. The 'C' in the model number typically denotes commercial temperature grade (-40 to +85 °C), while 'GMR' indicates tape and reel packaging. The device utilizes patented MultiSynth architecture to provide high-precision clock synthesis without external feedback components in standard modes.

Replacement Considerations

Direct pin-to-pin replacements within the same family include other Si5338 variants with different pre-configured outputs. When substituting, verify that the new part supports the specific output frequencies and signal formats required by the design, as internal configurations differ between SKUs.