SI5334A-B10521-GM

Overview

The SI5334A-B10521-GM is a pin-controlled quad clock generator utilizing MultiSynth technology for independent frequency synthesis on four differential outputs. It supports any frequency up to 350 MHz and select frequencies up to 710 MHz with zero ppm accuracy and 0.7 ps RMS typical jitter. The device accepts external crystals (8–30 MHz) or reference clocks (5–710 MHz). Outputs are configurable for LVPECL, LVDS, HCSL, CMOS, SSTL, or HSTL formats with independent supply voltages of 1.5, 1.8, 2.5, or 3.3 V. It operates from a core supply of 1.8, 2.5, or 3.3 V in a 24-lead QFN package.

Feature Summary

• MultiSynth technology enables independent, any-frequency synthesis on four differential output drivers with low phase jitter (0.7 ps RMS typ).
• Highly-configurable output drivers support up to four differential outputs or eight single-ended clock outputs with independent voltage levels.
• Flexible input reference options include external crystals (8–30 MHz), CMOS (5–200 MHz), SSTL/HSTL (5–350 MHz), and differential inputs (5–710 MHz).
• Pin-controlled configuration allows glitchless frequency adjustments in 1 ppm steps and phase adjustment with <20 ps steps.

Applications

• Ethernet switch/router
• PCI Express 2.0/3.0
• Broadcast video/audio timing
• Processor and FPGA clocking
• MSAN/DSLAM/PON

Procurement Notes

Verify the specific ordering suffix 'B10521' against the manufacturer's datasheet to confirm the exact factory-programmed frequency plan and output configurations. Ensure compatibility with the required input reference source and output signal formats before procurement.

Selection Notes

Select this component when independent frequency synthesis on multiple outputs is required without I2C programming overhead. Verify that the target frequencies fall within the supported ranges: up to 350 MHz for general use and up to 710 MHz for specific LVPECL/LVDS configurations. Confirm power supply requirements match the available 1.8, 2.5, or 3.3 V core options.

Part Context

This part belongs to the Si5334 family of pin-controlled clock generators. The 'A' suffix typically denotes specific pin-control logic variations within the family, while 'B10521' specifies the unique factory-programmed frequency plan. The 'GM' indicates a lead-free, RoHS-compliant 24-QFN package.

Replacement Considerations

Direct replacements must be sought from the Si5334 family with matching frequency plans. Generic clock generators may not support the same pin-control interface or MultiSynth flexibility. Verify pinout compatibility and electrical specifications if considering alternative manufacturers.

FAQ

What is the maximum output frequency supported by the SI5334A?

The device supports any frequency up to 350 MHz. Select frequencies can reach up to 710 MHz, specifically for LVPECL and LVDS output formats.

How is the device configured?

The Si5334A is pin-controlled. Configuration is either factory-programmed into NVM or set via external pins upon power-up, without requiring an I2C interface.

Can the output voltage levels be adjusted independently?

Yes, each output driver has its own supply voltage (VDDOx) which can be set to 1.5, 1.8, 2.5, or 3.3 V, allowing for mixed-signal operation.