SI5338C-B05973-GM

Overview

The SI5338C-B05973-GM is a 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 (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz). Outputs support LVPECL, LVDS, HCSL, CMOS, SSTL, HSTL, and CML formats across frequencies up to 710 MHz. Key electrical parameters include a core supply voltage of 1.8 V, 2.5 V, or 3.3 V, typical operating current of 45 mA, and low phase jitter of 0.7 ps RMS.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with true zero ppm accuracy.
• Low phase jitter performance of 0.7 ps RMS typ, compliant with PCIe Gen 1/2/3/4 Common Clock and Gen 3 SRNS standards.
• Highly configurable output drivers supporting up to four differential outputs, eight single-ended outputs, or mixed configurations.
• Independent frequency increment/decrement feature allows glitchless adjustments in 1 ppm steps via I2C/SMBus interface.

Applications

• Ethernet switch/router timing
• PCIe Gen1/2/3/4 clocking
• Broadcast video/audio timing
• Processor and FPGA clocking
• MSAN/DSLAM/PON systems

Procurement Notes

Verify the specific factory-programmed configuration associated with the B05973 suffix against system requirements using ClockBuilder Pro software. Confirm package availability and lead times through authorized distributors, as inventory levels for custom-programmed variants may vary. Ensure ESD precautions are observed during handling due to the sensitivity of the QFN-24 package.

Selection Notes

Select this part when independent, glitch-free frequency adjustments are required for multiple clock domains. Verify that the desired output signal formats (LVPECL, LVDS, HCSL, etc.) and voltage levels (1.5 V, 1.8 V, 2.5 V, 3.3 V) match the load requirements. Ensure the input reference source falls within the supported frequency ranges for the selected input type.

Part Context

This component belongs to the Si5338 family of I2C-programmable clock generators. The 'C' designation typically indicates a specific performance grade or feature set within the series, while the 'B05973' suffix denotes a unique factory-programmed NVM configuration. The '-GM' suffix indicates a lead-free, halogen-free RoHS-compliant QFN-24 package.

Replacement Considerations

Direct pin-to-pin replacements must maintain the same MultiSynth architecture and I2C programming interface. Verify that alternative parts support the same output formats and jitter specifications. Custom-programmed variants like this one generally require reprogramming or equivalent factory-configured substitutes rather than generic drop-in swaps.

FAQ

What is the maximum output frequency supported by the SI5338?

The device supports output frequencies up to 710 MHz for LVPECL, LVDS, and CML formats. CMOS outputs are supported up to 200 MHz, while HCSL outputs reach 250 MHz.

Can the SI5338 perform glitch-free frequency changes?

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

What input reference types are supported?

The Si5338 supports external crystals (8–30 MHz), CMOS single-ended inputs (5–200 MHz), SSTL/HSTL inputs (5–350 MHz), and differential inputs (5–710 MHz).