SI5338C-B04404-GMR

Overview

The Skyworks SI5338C-B04404-GMR is an I2C-programmable quad clock generator utilizing MultiSynth technology for any-frequency synthesis. It features four independent output drivers configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats with supply voltages of 1.5, 1.8, 2.5, or 3.3 V. The device supports core supplies of 1.8, 2.5, or 3.3 V and achieves a typical phase jitter of 0.7 ps RMS. Input references include external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), or differential signals (5–710 MHz). It operates within a –40 to +85 °C temperature range in a 4x4 mm QFN package.

Feature Summary

• Low phase jitter of 0.7 ps RMS typical
• Zero ppm frequency precision on all outputs
• Independent output voltage selection: 1.5, 1.8, 2.5, or 3.3 V
• Glitchless frequency adjustment in 1 ppm steps

Applications

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

Procurement Notes

Verify the ordering suffix GMR indicates tape-and-reel packaging configuration. Confirm the specific variant matches the required output format and voltage levels. Ensure compatibility with the I2C bus voltage levels used in the target system design.

Selection Notes

Select this component when multiple independent clock frequencies are required from a single source. Verify that the input reference frequency falls within the supported ranges for the chosen input type. Check that the output driver formats match the receiving device requirements.

Part Context

This part belongs to the Si5338 family of programmable clock generators. It replaces discrete crystal oscillators by synthesizing precise frequencies. The device integrates PLL and MultiSynth stages for low-jitter performance across various digital interfaces.

Replacement Considerations

Direct substitutes require matching quad-output architecture and I2C programmability. Verify pinout compatibility and electrical specifications such as jitter performance and supply voltage ranges before substitution.