SI5338C-B04858-GM

Overview

The SI5338C-B04858-GM is a programmable quad clock generator utilizing MultiSynth technology to synthesize any frequency with zero ppm precision on four independent outputs. It operates from a single core supply of 1.8, 2.5, or 3.3 V and accepts differential inputs up to 710 MHz. The device features low phase jitter of 0.7 ps RMS typical, glitchless frequency adjustment in 1 ppm steps, and independent phase adjustment with <20 ps accuracy. It supports flexible input references including external crystals (8–30 MHz), CMOS, SSTL/HSTL, and differential signals.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four output drivers with true zero ppm accuracy.
• Low phase jitter of 0.7 ps RMS typical across LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL formats.
• Glitchless frequency increment/decrement in 1 ppm steps and independent phase adjustment with <20 ps resolution.
• Highly configurable spread spectrum (SSC) supporting frequencies from 5 to 350 MHz with modulation rates from 33 to 63 kHz.

Applications

• PCIe Gen 1/2/3/4 common clock and Gen 3 SRNS compliant timing
• Ethernet switch/router and 1 GbE/10 GbE interfaces
• Processor and FPGA clocking systems
• Broadcast video/audio timing distribution
• Telecom line cards and MSAN/DSLAM/PON equipment

Procurement Notes

Verify the specific B04858 factory code against Skyworks documentation to confirm the exact pre-programmed frequency configuration. Confirm package type is QFN-24 and operating temperature range is -40 to +85 °C. Ensure I2C/SMBus interface compatibility with host controller voltage levels.

Selection Notes

Select this component when replacing multiple crystal oscillators with a single programmable source. Ensure input reference matches available sources (crystal, CMOS, or differential). Verify output driver voltage requirements (1.5, 1.8, 2.5, or 3.3 V) match the load. Use ClockBuilder Pro software for register configuration and verification.

Part Context

The SI5338C-B04858-GM belongs to the Si5338 family of I2C-programmable any-frequency, any-output quad clock generators. The 'C' suffix typically denotes a specific factory-programmed frequency set, while 'GM' indicates the QFN-24 package and lead-free status. This part replaces discrete oscillators in high-performance digital systems requiring precise, low-jitter clocking.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the verified source material. When replacing, ensure the new part supports the required output frequencies, formats, and jitter specifications. Verify pinout compatibility and thermal characteristics if substituting with other Si533x variants.

FAQ

What is the maximum input frequency supported by the SI5338?

The device supports differential input frequencies up to 710 MHz. Single-ended CMOS inputs support up to 200 MHz, while SSTL/HSTL inputs support up to 350 MHz.

Can the SI5338 perform glitchless frequency adjustments?

Yes, the device features an independent frequency increment/decrement capability that allows glitchless frequency adjustments in 1 ppm steps.

What output signal formats are supported?

The Si5338 supports LVPECL, LVDS, CML, HCSL, CMOS, SSTL, and HSTL output formats. Each output driver can be independently configured for voltage levels of 1.5, 1.8, 2.5, or 3.3 V.