SI5334C-B05948-GMR

Overview

The SI5334C-B05948-GMR is a pin-controlled quad clock generator from Skyworks Solutions. It synthesizes any frequency on four differential outputs using MultiSynth technology, achieving zero ppm frequency error and 0.7 ps RMS typical jitter. The device supports input frequencies up to 710 MHz and output formats including LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL. It operates with independent core supply voltages of 1.8 V, 2.5 V, or 3.3 V and output driver supplies ranging from 1.5 V to 3.3 V. Packaged in a 24-lead QFN (4x4 mm), it functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• MultiSynth Technology: Enables independent, any-frequency synthesis on four differential outputs with low phase jitter (0.7 ps RMS typ) and true 0 ppm accuracy.
• Flexible Input/Output: Accepts external crystals (8–30 MHz) or reference clocks (up to 710 MHz). Outputs support LVPECL, LVDS, HCSL, CMOS, SSTL, and HSTL formats.
• Independent Voltage Domains: Features independent core supply options (1.8 V, 2.5 V, 3.3 V) and per-driver output voltage configurations (1.5 V, 1.8 V, 2.5 V, 3.3 V).
• Pin-Controlled Operation: Factory-programmed configuration activates upon power-up without user intervention; includes LOSLOL alarm and OEB control.

Applications

• Ethernet switch/router clocking
• PCI Express 2.0/3.0 timing
• Processor and FPGA clock generation
• Broadcast video/audio synchronization
• Telecom line cards and MSAN/DSLAM/PON systems

Procurement Notes

Verify the specific suffix 'B05948' against the official Skyworks datasheet to confirm the exact factory-programmed frequency plan and output configuration. As this is a custom part number, ensure compatibility with the required input reference frequency and output signal formats before integration.

Selection Notes

Select this component when low jitter (<1 ps RMS) and precise frequency accuracy are critical for high-speed serial interfaces. Ensure the design accommodates the 24-QFN package thermal requirements and that the target application utilizes pin-control rather than I2C programming.

Part Context

This part belongs to the Si5334 family of pin-controlled clock generators. Unlike I2C-programmable variants, the Si5334 series relies on factory-defined NVM settings. The 'C' variant typically denotes specific performance characteristics within the broader Si5334 product line.

Replacement Considerations

Direct replacements must match the 24-QFN footprint and pinout. Verify if alternative Skyworks models like the Si5338 (I2C-controlled) or Si5336 can meet the electrical specifications, noting that programming methods differ significantly.

FAQ

Does the SI5334C support I2C programming?

No, the Si5334C is a pin-controlled device. Its configuration is stored in factory-programmed NVM and does not include an I2C interface.

What is the maximum output frequency supported?

The device supports any frequency up to 350 MHz on all outputs, with select frequencies capable of reaching up to 710 MHz depending on the specific divider configuration.

Can the output drivers operate at different voltage levels?

Yes, each of the four output drivers has an independent supply pin (VDDOx), allowing for mixed-signal operation with voltages of 1.5 V, 1.8 V, 2.5 V, or 3.3 V.