Low Jitter, 11-output MEMS Network Synchronizer

The Cascade Platform™ SiT95148 is a single-chip MEMS network synchronizer optimized for IEEE 1588 and time synchronization applications. The device comes with 4 independent time domains, 1 mHz to 4 kHz programmable loop bandwidth, low wander mode and fastest hitless switching.  Its low noise quad-PLL architecture and programmable output drivers provide up to 10 differential or 20 LVCMOS low jitter clock outputs. It supports 4 additional clock inputs with Frac-N dividers, enabling virtually any input to output frequency translation configurations from 8 kHz to 2.1 GHz.  

This network synchronizer integrates SiTime’s third-generation ApexMEMS™ resonator. This integrated MEMS approach eliminates the dependency on a crystal reference, along with all quartz related issues, offering a true clock-system-on-a-chip that improves system robustness:

  • 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

The SiT95148 is supported by TimeMaster™ software application to simplify clock tree design. The device can also be shipped with a user-specified, factory pre-programmed default startup configuration. The device configuration can be re-programmed twice using two banks of one-time-programmable (OTP) memory during manufacturing or configured in-system via I2C/SPI for additional BOM flexibility. The SiT95148 is also supported with the SiT6503EB evaluation board.

View related products: 8 outputs

Single-chip network synchronizer consolidates MEMS resonator, multiple clock ICs and oscillators into a single 9 x 9 mm 64-pin device
Number of Inputs 4
Number of Outputs 11
Input Frequency Range 8 kHz to 2.1 GHz (differential), 8 kHz to 250 MHz (LVCMOS)
Output Frequency Range 8 kHz to 2.1 GHz (differential), 8 kHz to 250 MHz (LVCMOS), 1 PPS (one output only)
Output Type LVPECL, CML, HCSL, LVDS, LVCMOS
Number of PLL/Clock Domains 4 PLLs, 4 time domains
Programmable Loop Bandwidth 1 mHz to 4 kHz
Operating Temperature Range (°C) -40 to +85
Phase Jitter (rms) 120 fs
Voltage Supply (V) 1.8, 2.5, 3.3
Operating Mode Free running, synchronized, holdover
Package Type (mm²) 9x9 mm, 64-pin
Features Low wander mode, hitless switching, zero-delay buffer mode, DCO with 50-ppt resolution, programmable output delay control

Clock-system-on-a-chip with integrated MEMS, simplifies designs

  • No crystal capacity matching, always-accurate frequency synthesis
  • No noise coupling onto crystal circuits, guaranteed jitter
  • Resistant to vibration and board bending, anywhere PCB replacement

Flexible features for best IEEE 1588, syncE, and timing synchronization performance

  • 4 inputs, 11 outputs, 4 PLLs, up to 2.1 GHz output frequency for flexible frequency translation
  • Individually configurable output types and voltage to support a wide range of processor and SOCs
  • Programmable loop bandwidth (1 mHz to 4 kHz)
  • Low wander mode using precision TCXO for clock recovery and OCXO for holdover
  • Fastest hitless switching (sub 50 ps phase build-out)

35% space saving ideal for high density designs

  • 9 x 9 mm package, no external XTAL/oscillator required

Semiconductor level quality and reliability, eliminates quartz related issues associated with traditional clocks

  • Test and measurement
  • Storage, servers and datacenters

Narrow By:

Document Name Type
Manufacturing Notes for SiTime Products Other Quality Documents
SiTime Conflict Minerals Policy Other Quality Documents

 

SiT6503 Eval Board User Manual for Cascade SiT9514x devices – Configure and evaluate device performance

Cascade SiT9514x EVB Software User Manual – Get GUI installation, operation, configuration details

Cascade SiT9514x GUI Software Version 1.30.4 – Download software .exe file

Cascade SiT9514x GUI Release Notes - Get details on the latest version

 

Narrow By:

Resource Name Type
Timing Solutions for Communications & Enterprise Brochures/Fliers
SiT6503EB Evaluation Board User Manual User Manuals
5G New Radio (NR) – RRU, AAU, Massive MIMO Application Briefs
Fronthaul Switches Application Briefs
Microwave Outdoor Units (ODU) Application Briefs
Open RAN (ORAN) – Macro and Small Cells Application Briefs
Cascade SiT9514x Clock-System-on-Chip Family Product Briefs
SiTime MEMS Timing Solutions for 5G RRU Videos
SiTime MEMS Timing Solutions for Open RAN Videos
Cascade MEMS Clocks FAQs FAQs
AN20003 SiT9514x Power Supply Noise Rejection Application Notes
AN20011 SiT9514x Dynamic Control of Outputs Application Notes
Cascade Platform – MEMS Clock-System-on-a-Chip Family Presentations
SiTime MEMS First 工艺 Technology Papers
Cascade SiT9514x GUI Software Version 1.30.4 Software
Cascade SiT9514x EVB Software User Manual User Manuals
AN10073 How to Setup a Real-time Oscilloscope to Measure Jitter Application Notes
AN10071 Computing TIE Crest Factors for Telecom Applications Application Notes
AN10070 Computing TIE Crest Factors for Non-telecom Applications Application Notes
AN10072 Determine the Dominant Source of Phase Noise, by Inspection Application Notes
AN10074 Removing Oscilloscope Noise from RMS Jitter Measurements Application Notes
Top of Rack Switch / Leaf Switch Application Briefs
ORAN Distributed Unit Application Briefs
Test and Measurement Application Briefs
SiTime MEMS Timing Solutions for SmartNICs Videos
SiTime MEMS Timing Solutions for Data Centers Videos