Si5342/5344/5345/5346/5347 Jitter Attenuating Clocks

The Silicon Labs jitter attenuators lead the industry in jitter performance and frequency flexibility. Designed to meet the exacting specifications and high-performance requirements of Internet infrastructure, these best-in-class, ultra-low jitter clock devices reduce cost and complexity for a wide range of timing applications.  

The Si534x any-frequency jitter attenuating clocks generate output frequency (100 Hz to 1028 MHz) from any input frequency (8 kHz to 750 MHz), yet still deliver industry-leading jitter performance (90-fs RMS phase jitter). Our innovative architecture combines proprietary DSPLL® and MultiSynth technologies, providing infinite frequency synthesis and jitter attenuation in a highly integrated PLL solution. 

Features

  • Generates any combination of output frequencies from any input frequency
  • Ultra low jitter: 100 fs rms
  • I2C/SPI or pin control
  • Selectable loop bandwidth (0.1 Hz - 8 kHz)
  • SyncE ITU-T G.8262 compliant
  • Fast lock PLL <100ms
  • Synchronous, free-run and holdover modes
  • Accepts gapped clock inputs
  • Automatic/manual hitless switching
  • Status monitoring: LOL, LOS, OOF
  • Reprogrammable to any frequency without BOM changes
  • In-circuit programmable via SPI and I2C

Product Matrix

Devices
Part Number Customize Data Sheet Dev KIt Control Reference Inputs Clock Outputs Input Frequency min (kHz) Input Frequency max (MHz) Output Frequency min (MHz) Output Frequency max (MHz) Phase Jitter (RMS) (ps) VDD (V) VDDO (V) Package Type Package Size (mm) Clock Generators Jitter Attenuating Clocks Synchronous Ethernet/1588 PCI Express Clocks 4G/LTE Wireless Clocks Intel x86 Clocks
Si5342-D-EVB I2C/SPI 4 2 8 750 0.0001 350, 1028 0.09 1.8; 2.5; 3.3 1.8; 2.5; 3.3 QFN44 7x7 No Yes Yes No No No
Si5344-D-EVB I2C/SPI 4 4 8 750 0.0001 350, 1028 0.09 1.8; 2.5; 3.3 1.8; 2.5; 3.3 QFN44 7x7 No Yes Yes No No No
Si5345-D-EVB I2C/SPI 4 10 8 750 0.0001 350, 1028 0.09 1.8; 2.5; 3.3 1.8; 2.5; 3.3 QFN64 9x9 No Yes Yes No No No
Si5346-D-EVB I2C/SPI 4 4 8 750 0.0001 350, 720 0.09 1.8; 3.3 1.8; 2.5; 3.3 QFN44 7x7 No Yes Yes No No No
Si5347-D-EVB I2C/SPI 4 4, 8 8 750 0.0001 350, 720 0.09 1.8; 3.3 1.8; 2.5; 3.3 QFN44, QFN64 7x7, 9x9 No Yes Yes No No No
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