Si5338A Differential Clock Generator

The Si5338A 4-output differential clock generator is is capable of synthesizing 4 completely non-integer-related frequencies between 0.16 and 710 MHz. The device has four banks of outputs with each bank supporting one differential pair or two single-ended outputs. Using Skyworks' patented MultiSynth fractional divider technology, all outputs are guaranteed to have 0 ppm frequency synthesis error regardless of configuration, enabling the replacement of multiple clock ICs and crystal oscillators with a single device.


Loop Bandwidth Max (MHz)
Output Bin<
Temperature Range Min (°C)-40
Input Frequency Min (MHz)5
Package TypeQFN24
Line Impedance Match0
Clock Generatorstrue
Jitter Attenuating Clocksfalse
Number of Outputs4
Input Frequency Max (MHz)710
Intel x86 Clocksfalse
Package Size (mm)4x4
Real Time Clockfalse
DescriptionI2C Any-Freq, CMOS Clock Gen
Frequency Reference
4G/LTE Wireless Clocksfalse
56G SerDesfalse
VDDO (V)1.8; 2.5; 3.3
VDD (V)1.8; 2.5; 3.3
Jitter Recommended Range (fs)<
PCI Expresstrue
Phase Jitter (ps RMS)1
Spread Spectrumtrue
Synchronous Ethernet/1588false
Xtal Input Frequency
Reference Inputs1
Output Format CategoriesDifferential; Single-Ended
Standards Compliance
Output Frequency Min0.16
Embedded Xtaltrue
Loop Bandwidth Min (MHz)
Temperature Range Max (°C)85
Output Frequency Max710

Product Documents

Quality and Packaging

Look up product's green / pb-free status and information on RoHS, REACH, Halogen Free, and PFIS.

Certificate of Performance

Evaluation Kits

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Si5338/Si5356 Field Programming Evaluation Kit

The Si5338/56-PROG-EVB Field Programming Kit provides all of the tools necessary for writing a new configuration file to the one-time programmable (OTP) non-volatile memory (NVM) in the Si5338/Si5356 any-frequency, any-output clock generator.

MSRP $150.00

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Si5338 Evaluation Kit

For simplified evaluation of the Si5330/34/35/38 any-frequency, any-output quad clock generators and buffers, development kits are available. The Si5338 clock generator can synthesize any combination of up to 4 differential clock outputs, each of which is independently programmable to any frequency up to 350 MHz and select frequencies to 710 MHz.

MSRP $125.00

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ClockBuilder Pro Field Programmer

When used with ClockBuilder Pro software, the ClockBuilder Pro Field Programmer makes it simple for systems designers to develop, program, and debug any Si5332/8, Si5350/1/6/7, Si534x/6x/8x/9x, Si540x, and Si55xx part families clock device “in-system,” or in one of the convenient QFN sockets. The field programmer supports I2C or SPI interfaces to the host system, and SPI to the field programmer's QFN socket boards.

MSRP $149.00