SiTime jitter cleaners and network synchronizers consolidate multiple clock ICs into a single device and deliver low jitter and fast hitless switching to ensure redundancy for IEEE 1588, synchronized Ethernet (syncE) and high-speed SerDes. For designers seeking a complete clock-system-on-a-chip, the Cascade™ MEMS-based clocks integrate SiTime’s third generation ApexMEMS™ resonator that eliminates the dependency on quartz, along with all quartz related issues. This integrated MEMS approach, combined with low noise and a feature-rich PLL IC, enable more robust system timing for high reliability systems.

MEMS Jitter Cleaners
Cascade™ MEMS-based jitter cleaners feature 4 Frac-N PLLs with an integrated VCO and loop filter, flexible input-to-output frequency translation from 1 input to 10 outputs, wide frequency range from 8 kHz to 2.1 GHz, and a rich set of programmable features in a small 9 x 9 mm package. By integrating the MEMS resonator, these devices enable designers to create a clock-system-on-a-chip and eliminate all quality and reliability issues associated with traditional quartz-based clocks.
- Always-accurate clock synthesis by eliminating crystal capacitive mismatch
- Always-reliable startup even at cold temperature and other harsh environmental conditions
- No jitter degradation because of noise coupling onto a crystal interface
- No activity dips/frequency jumps inherent to quartz
- 10x more resistant to vibration and board bending
Device | Datasheet | Buy Now | Number of Inputs | Number of Outputs | Output Frequency | Number of PLL/Clock Domains | Phase Jitter(rms) | Package(mm) |
---|---|---|---|---|---|---|---|---|
SiT95145 |
|
4 | 10 | 2.1 GHz | 4 PLL 1 time domain | 120 fs | 9x9 mm, 64-pin |

Jitter Cleaners
SiTime jitter cleaners feature up to 4 fractional PLLs, flexible input-to-output frequency translation with 4 inputs to 10 outputs, up to 12 outputs, wide frequency range, and a rich set of programmable features in small QFN packages.
- Low 85 fs integrated jitter minimizes bit error rate and increases design margin
- When combined with a MEMS oscillator, quartz-related issues are eliminated including jitter degradation because of noise coupling onto a crystal interface, activity dips/frequency jumps and vibration sensitivity
Device | Datasheet | Buy Now | Number of Inputs | Number of Outputs | Output Frequency | Number of PLL/Clock Domains | Phase Jitter(rms) | Package(mm) |
---|---|---|---|---|---|---|---|---|
SiT95312 |
|
4 | 2 | 2.94912 GHz | 2 PLL | 85 fs typ.; 70 fs typ. (with MEMS oscillator) | 7x7 mm, 44-pin QFN | |
SiT95314 |
|
4 | 4 | 2.94912 GHz | 4 PLL | 85 fs typ.; 70 fs typ. (with MEMS oscillator) | 7x7 mm, 44-pin QFN | |
SiT95315 |
|
4 | 12 | 2.94912 GHz | 4 PLL | 85 fs typ.; 70 fs typ. (with MEMS oscillator) | 9x9 mm, 64-pin QFN |

MEMS Network Synchronizers
Cascade™ MEMS-based network synchronizers features 4 independent time domains, 1 mHz to 4 kHz programmable loop bandwidth and DCO mode with 50-ppt resolution to frequency, and phase recovery from syncE and IEEE 1588. These devices also come with 4 Frac-N PLLs with an integrated VCO and loop filter, flexible input to output frequency translation, wide frequency range, and a rich set of programmable features in a small 9 x 9 mm package. By integrating the MEMS resonator, these devices enable designers to create a clock-system-on-a-chip and eliminate all quality and reliability issues associated with traditional quartz-based clocks.
- Always-accurate clock synthesis by eliminating crystal capacitive mismatch
- Always-reliable startup even at cold temperature and other harsh environmental conditions
- No jitter degradation due to noise coupling onto a crystal interface
- No activity dips/frequency jumps inherent to quartz
- 10x more resistant to vibration and board bending
Device | Datasheet | Buy Now | Number of Inputs | Number of Outputs | Output Frequency | Number of PLL/Clock Domains | Phase Jitter(rms) | Package(mm) |
---|---|---|---|---|---|---|---|---|
SiT95147 |
|
4 | 8 | 2.1 GHz | 4 PLLs 4 time domains | 120 fs | 9x9 mm, 64-pin | |
SiT95148 |
|
4 | 11 | 2.1 GHz | 4 PLLs 4 time domains | 120 fs | 9x9 mm, 64-pin |

Network Synchronizers
SiTime network synchronizers feature 4 independent time domains, programmable loop bandwidth, DCO mode with 0.001-ppt resolution to frequency, and phase recovery from syncE and IEEE 1588, best-in-class lock time and hitless switching performance. These devices come with 4 fractional PLLs, flexible input to output frequency translation, wide frequency range from 0.5 Hz to 2.94912 GHz, and a rich set of programmable features in small QFN packages.
- Low 85 fs integrated jitter minimizes bit error rate and increases design margin
- When combined with a MEMS oscillator, quartz-related issues are eliminated including jitter degradation because of noise coupling onto a crystal interface, activity dips/frequency jumps and vibration sensitivity
Device | Datasheet | Buy Now | Number of Inputs | Number of Outputs | Output Frequency | Number of PLL/Clock Domains | Phase Jitter(rms) | Package(mm) |
---|---|---|---|---|---|---|---|---|
SiT95316 |
|
4 | 12 | 2.94912 GHz | 4 PLL | 85 fs typ.; 70 fs typ. (with MEMS oscillator) | 9x9 mm, 64-pin QFN | |
SiT95317 |
|
4 | 8 | 2.94912 GHz | 4 PLL | 85 fs typ.; 70 fs typ. (with MEMS oscillator) | 9x9 mm, 64-pin QFN |