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Skyworks
Ultra Low-Jitter Clock Generator
Si5391
The any-frequency, any-output Si5391 clock generators combine a wide-band PLL with proprietary MultiSynth™ fractional synthesizer technology to offer a versatile and high performance clock generator platform.
Ultra Low-Jitter, 12-Output, Any-Frequency, Any-Output Clock Generator
The any-frequency, any-output Si5391 clock generators combine a wide-band PLL with proprietary MultiSynth™ fractional synthesizer technology to offer a versatile and high performance clock generator platform. This highly flexible architecture is capable of synthesizing a wide range of integer and non-integer related frequencies up to 1 GHz on 12 differential clock outputs while delivering sub-100 fs rms phase jitter performance optimized for 100G/200G/400G applications. Each of the clock outputs can be assigned its own format and output voltage enabling the Si5391 to replace multiple clock ICs and oscillators with a single device making it a true "clock tree on a chip." The Si5391 can be quickly and easily configured using ClockBuilderPro software. Custom part numbers are automatically assigned using ClockBuilder™ Pro for fast, free, and easy factory pre-programming or the Si5391 can be programmed via I2C and SPI serial interfaces.
Applications:
- 100/200/400G switches
- 56G/112G PAM4 SerDes reference clocks
- Clock tree generation replacing XOs, buffers, signal format translators
- Clocking for FPGAs, processors, memory
- Ethernet switches/routers
- OTN framers/mappers/processors
Key Features
1. Generates any combination of output frequencies from any input frequency
2. Ultra-low jitter performance
- 69fs RMS (Precision Calibration)
- 75fs RMS (integer mode)
- 115fs RMS (fractional mode)
- External crystal: 25 to 54 MHz
- Differential clock: 10 to 750 MHz
- LVCMOS clock: 10 to 250 MHz
- Differential: 100 Hz to 1028 MHz
- LVCMOS: 100 Hz to 250 MHz
6. Si5391: 4 input, 12 output, 64-QFN 9x9mm
*Skyworks Authorized Distributor
