Si5391 Data Sheet Ultra Low-Jitter, 12-Output, Any-Frequency, Any-Output Clock KEY FEATURES Generator Generates any combination of output The any-frequency, any-output Si5391 clock generators combine a wide-band PLL with frequencies from any input frequency proprietary MultiSynth fractional synthesizer technology to offer a versatile and high Ultra-low jitter performance performance clock generator platform. This highly flexible architecture is capable of 69fs RMS (Precision Calibration) synthesizing a wide range of integer and non-integer related frequencies up to 1 GHz 75fs RMS (integer mode) on 12 differential clock outputs while delivering sub-100 fs rms phase jitter perform- 115fs RMS (fractional mode) ance 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 Input frequency range: clock ICs and oscillators with a single device making it a trueclock tree on a chip External crystal: 25 to 54 MHz Differential clock: 10 to 750 MHz The Si5391 can be quickly and easily configured using ClockBuilderPro software. Cus- LVCMOS clock: 10 to 250 MHz tom part numbers are automatically assigned using ClockBuilder Pro for fast, free, Output frequency range: and easy factory pre-programming or the Si5391 can be programmed via I2C and SPI Differential: 100 Hz to 1028 MHz serial interfaces. LVCMOS: 100 Hz to 250 MHz Highly configurable outputs compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL Applications: with programmable signal amplitude 100/200/400G switches Si5391: 4 input, 12 output, 64-QFN 9x9mm 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 25-54 MHz XTAL XA XB OSC MultiSynth INT OUT0 IN0 INT MultiSynth OUT0A INT MultiSynth INT OUT1 INT IN1 PLL MultiSynth INT OUT2 IN2 INT MultiSynth INT OUT3 INT OUT4 Zero Delay INT OUT5 FB IN INT INT OUT6 Status Flags Status Monitor INT OUT7 INT OUT8 I2C / SPI Control NVM INT OUT9 INT OUT9A Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 1 Rev. 0.7 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 5, 2021 1Si5391 Data Sheet Features List 1. Features List The Si5391 features are listed below: Generates any combination of output frequencies from any DCO mode: as low as 0.001 ppb steps input frequency Core voltage Ultra-low phase jitter performance VDD: 1.8 V 5% 69fs RMS (Precision Calibration) VDDA: 3.3 V 5% 75fs RMS (integer mode) Independent output clock supply pins 115fs RMS (fractional mode) 3.3 V, 2.5 V, or 1.8 V Input frequency range: Serial interface: I2C or SPI External crystal: 25 to 54 MHz In-circuit programmable with non-volatile OTP memory Differential clock: 10 to 750 MHz ClockBuilder Pro software simplifies device configuration LVCMOS clock: 10 to 250 MHz 64-QFN 9x9mm Output frequency range: Temperature range: 40 to +85 C Differential: 100 Hz to 1028 MHz Pb-free, RoHS-6 compliant LVCMOS: 100 Hz to 250 MHz Highly configurable outputs compatible with LVDS, LVPECL, LVCMOS, CML, and HCSL with programmable signal ampli- tude Optional zero delay mode Glitchless on the fly output frequency changes Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 Rev. 0.7 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 5, 2021 2