Si5342H and Si5344H Coherent Optical Clocks
The Si5344H/Si5342H coherent optical clock is purpose-built to address the needs of coherent optical communications applications. Silicon Labs’ coherent clock utilizes specialized high-speed dividers and drivers to deliver up to 2.7 GHz clocks with ultra-low 50 fs-rms phase jitter required coherent transceiver DACs and ADCs. The Si5344H/Si5342H leverages 4th generation DSPLL technology to clean recovered clocks, DCO mode for coherent DSP control via a fast SPI interface, and integrated MultiSynth fractional synthesis to support eye-diagram monitors, FEC, and MUX/DEMUX clock requirements. Such single-chip integration enables designers to meet the stringent performance, form-factor, and power requirements demanded in 100G/200G/400G line cards and modules.
Features
- Up to 2.7 GHz outputs replace VCSOs and synthesizers
- Ultra-low phase jitter: 50 fs-rms (100kHz - 20 MHz)
- Digitally selectable loop bandwidth for cleaning recovered clocks
- Digitally controlled oscillator (DCO) with fast SPI interface
- MultiSynth fractional synthesis for any-frequency clock support
- Single-chip solution in a small 7 x 7 mm, QFN44 package
- Si5344H: 4-outputs, Si5342H: 2-outputs
Evaluate Coherent Optical Clocks
The easiest way to begin development with the Coherent Optical Clocks family is with the Si5344H-EVB kit. The development kit make it easy to move from ClockBuilder Pro device configuration to hands-on performance evaluation.
Product Matrix
| Part Number | Data Sheet | Dev KIt | Description | Control | Reference Inputs | Clock Outputs | Input Frequency (MHz) | Output Frequency (MHz) | Output Format(s) | Phase Jitter (RMS) (ps) | VDD (V) | VDDO (V) | Package Type | Package Size (mm) | Output Bin | Clock Generators | Jitter Attenuating Clocks | Synchronous Ethernet/1588 | PCI Express Clocks | 4G/LTE Wireless Clocks | Intel x86 Clocks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Si5344H-EVB | 100G/400G coherent optics clock, 4-Output, < 2.7 GHz, jitter attenuator, DCO | I2C/SPI | 2 | 2 | 0.008 750 | 0.0001 2750 | CML, HCSL, LVCMOS, LVDS, LVPECL | 0.1 | 1.8; 2.5; 3.3 | 1.8; 2.5; 3.3 | QFN44 | 7x7 | <= 4 | No | Yes | No | No | No | No | |
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Si5344H-EVB | 100G/400G coherent optics clock, 2-Output, < 2.7 GHz, jitter attenuator, DCO | I2C/SPI | 2 | 4 | 0.008 750 | 0.0001 2750 | CML, HCSL, LVCMOS, LVDS, LVPECL | 0.1 | 1.8; 2.5; 3.3 | 1.8; 2.5; 3.3 | QFN44 | 7x7 | <= 4 | No | Yes | No | No | No | No |
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