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- SiT95145
- SiT95148
- SiT95147
- SiT95141
- SiT9501
- SiT9375
- SiT9367
- SiT9366
- SiT9365
- SiT9122
- SiT9121
- SiT9120
- SiT8209
- SiT8208
- SiT8009
- SiT8008
- SiT2002
- SiT2001
- SiT1602
- SiT9387
- SIT9386
- SiT9025
- SiT8925
- SiT8924
- SiT8921
- SiT8920
- SiT8919
- SiT8918
- SiT2025
- SiT2024
- SiT2021
- SiT2020
- SiT2019
- SiT2018
- SiT1618
- SiT9005
- SiT9003
- SiT9002
- SiT3809
- SiT3808
- SiT3807
- SiT3373
- SiT3372
- SiT3522
- SiT3521
- SiT3922
- SiT3921
- SiT3907
- SiT3901
- SiT5711
- SiT5721
- SiT5501
- SiT5359
- SiT5358
- SiT5357
- SiT5356
- SiT5157
- SiT5156
- SiT5155
- SiT5387
- SiT5386
- SiT5187
- SiT5186
- SiT5022
- SiT5021
- SiT5008
- SiT5001
- SiT5000
- SiT5349
- SiT5348
- SiT5347
- SiT5346
- SiT5147
- SiT5146
- SiT8945
- SiT8944
- SiT2045
- SiT2044
- SiT9347
- SiT9346
- SiT3542
- SiT3541
- SiT3343
- SiT3342
- SiT9045
- SiT1581
- SiT1580
- SiT1630
- SiT1573
- SiT1572
- SiT1533
- SiT1532
- SiT1568
- SiT1566
- SiT1552
- SiT1569
- SiT1534
- SiT1579
- SiT1576
- SiT8021
- SiT1425
- SiT1424
- SiT1421
- SiT1420
- SiT1419
- SiT1418
- SiT1409
- SiT1408
- SiT11XX
- SiT1252
- Description:
  Low Jitter, 10-output MEMS Jitter Cleaner
- Description:
  Low Jitter, 11-output MEMS Network Synchronizer
- Description:
  Low Jitter, 8-output MEMS Network Synchronizer
- Description:
  Low Jitter, 10-output MEMS Clock Generator
- Description:
  Ultra-low Jitter Differential XO for Standard Networking Frequencies
- Description:
  Low Jitter Differential XO for Standard Networking Frequencies
- Description:
  220 to 725 MHz, Ultra-low Jitter Differential XO
- Description:
  1 to 220 MHz, Ultra-low Jitter Differential XO
- Description:
  Standard Frequency Ultra-low Jitter Differential XO
- Description:
  220 to 625 MHz, ±10 to ±50 ppm Differential XO
- Description:
  1 to 220 MHz, ±10 to ±50 ppm Differential XO
- Description:
  Standard Frequency ±10 to ±50 ppm Differential XO
- Description:
  80 to 220 MHz, ±10 to ±50 ppm Oscillator
- Description:
  1 to 80 MHz, ±10 to ±50 ppm Oscillator
- Description:
  115 to 137 MHz, Low Power Oscillator
- Description:
  1 to 110 MHz, Low Power Oscillator
- Description:
  115 to 137 MHz, SOT23 Oscillator
- Description:
  1 to 110 MHz, SOT23 Oscillator
- Description:
  3.57 to 77.76 MHz, Low Power Oscillator
- Description:
  220 to 725 MHz, AEC-Q100 Ultra-low Jitter Differential XO
- Description:
  1 to 220 MHz, AEC-Q100 Ultra-low Jitter Differential XO
- Description:
  1 to 150 MHz, AEC-Q100 Spread-spectrum Oscillator
- Description:
  115 to 137 MHz, Wide Temperature AEC-Q100 Oscillator (-55 to +125°C)
- Description:
  1 to 110 MHz, Wide Temperature AEC-Q100 Oscillator (-55 to +125°C)
- Description:
  119 to 137 MHz, Wide Temperature Oscillator (-55 to +125°C)
- Description:
  1 to 110 MHz, Wide Temperature Oscillator (-55 to +125°C)
- Description:
  115 to 137 MHz, High Temperature Oscillator (-40 to +125°C)
- Description:
  1 to 110 MHz, High Temperature Oscillator (-40 to +125°C)
- Description:
  115 to 137 MHz, Wide Temperature AEC-Q100 SOT23 Oscillator
- Description:
  1 to 110 MHz, Wide Temperature AEC-Q100 SOT23 Oscillator
- Description:
  119 to 137 MHz, Wide Temperature (-55 to +125°C) SOT23 Oscillator
- Description:
  1 to 110 MHz, Wide Temperature (-55 to +125°C) SOT23 Oscillator
- Description:
  115 to 137 MHz, High Temperature (-40 to +125°C) SOT23 Oscillator
- Description:
  1 to 110 MHz, High Temperature (-40 to +125°C) SOT23 Oscillator
- Description:
  Standard Frequency, High Temperature Oscillator
- Description:
  1 to 141 MHz, Spread-spectrum Oscillator
- Description:
  1 to 110 MHz, Low Power Spread-spectrum Oscillator
- Description:
  1 to 220 MHz, Differential Spread-spectrum Oscillator
- Description:
  80 to 220 MHz, ±10 to ±50 ppm VCXO
- Description:
  1 to 80 MHz, ±10 to ±50 ppm VCXO
- Description:
  Standard Frequency VCXO
- Description:
  220 to 725 MHz Ultra-low Jitter Differential VCXO
- Description:
  1 to 220 MHz Ultra-low Jitter Differential VCXO
- Description:
  340 to 725 MHz I2C/SPI Programmable Oscillator
- Description:
  1 to 340 MHz I2C/SPI Programmable Oscillator
- Description:
  220 to 625 MHz, Differential Digitally-controlled XO
- Description:
  1 to 220 MHz, Differential Digitally-controlled XO
- Description:
  1 to 220 MHz, ±10 to ±50 ppm Digitally-controlled XO
- Description:
  1 to 26 MHz, Ultra-Small µPower DCXO
- Description:
  1 to 60 MHz, Stratum 3E OCXO
- Description:
  1 to 60 MHz, Stratum 3E DCOCXO
- Description:
  1 to 60 MHz, Elite X Stratum 3E Super-TCXO
- Description:
  60 to 220 MHz, ±50 ppb Super-TCXO
- Description:
  1 to 60 MHz, ±50 ppb Super-TCXO
- Description:
  60 to 220 MHz, Stratum 3 Super-TCXO
- Description:
  1 to 60 MHz, Stratum 3 Super-TCXO
- Description:
  60 to 220 MHz, ±0.5 to ±2.5 ppm Super-TCXO
- Description:
  1 to 60 MHz, ±0.5 to ±2.5 ppm Super-TCXO
- Description:
  ±0.5 ppm Super-TCXO for GNSS/GPS
- Description:
  60 to 220 MHz, ±0.1 to ±2.5 ppm AEC-Q100 Super-TCXO
- Description:
  1 to 60 MHz, ±0.1 to ±2.5 ppm AEC-Q100 Super-TCXO
- Description:
  60 to 220 MHz, ±0.5 to ±2.5 ppm AEC-Q100 Super-TCXO
- Description:
  1 to 60 MHz, ±0.5 to ±2.5 ppm AEC-Q100 Super-TCXO
- Description:
  220 to 625 MHz, ±5 ppm Differential (VC)TCXO
- Description:
  1 to 220 MHz, ±5 ppm Differential (VC)TCXO
- Description:
  ±2 to ±10 ppm Low-Power TCXO, 10 to 60 MHz
- Description:
  1 to 80 MHz, ±5 ppm (VC)TCXO
- Description:
  Standard Frequency ±5 ppm (VC)TCXO
- Description:
  60 to 220 MHz, ±50-ppb precision Super-TCXO
- Description:
  1 to 60 MHz, ±50-ppb precision Super-TCXO
- Description:
  60 to 220 MHz, ±0.1 to ±0.25 ppm precision Super-TCXO
- Description:
  1 to 60 MHz, ±0.1 to ±0.25 ppm precision Super-TCXO
- Description:
  60 to 220 MHz, ±0.5 to ±2.5 ppm Super-TCXO
- Description:
  1 to 60 MHz, ±0.5 to ±2.5 ppm Super-TCXO
- Description:
  115 to 137 MHz, Extended Temperature (-55 °C to 125 °C) Oscillator
- Description:
  1 to 110 MHz, Extended Temperature (-55 °C to 125 °C) Oscillator
- Description:
  115 to 137 MHz, Extended Temperature (-55 °C to 125 °C) SOT-23 Oscillator
- Description:
  1 to 110 MHz, Extended Temperature (-55 °C to 125 °C) SOT-23 Oscillator
- Description:
  220 to 725 MHz, Ultra-low Jitter, ±10 to ±50 ppm Differential Oscillator
- Description:
  1 to 220 MHz, Ultra-low Jitter, ±10 to ±50 ppm Differential Oscillator
- Description:
  340 to 725 MHz, Ultra-Low Jitter, ±20 to ±50 ppm, I2C Programmable Oscillator
- Description:
  1 to 340 MHz, Ultra-Low Jitter, ±20 to ±50 ppm, I2C Programmable Oscillator
- Description:
  220 to 725 MHz, Ultra-Low Jitter, ±15 to ±50 ppm VCXO
- Description:
  1 to 220 MHz, Ultra-Low Jitter, ±15 to ±50 ppm VCXO
- Description:
  1 to 150 MHz, Spread-spectrum, Extended Temperature (-55°C to 125 °C)
- Description:
  Ultra-Small, Low-Power, Low-Jitter, 1 Hz to 2.5 MHz Oscillator
- Description:
  Ultra-Small, Low-Power, Low-Jitter, ±5 ppm, 32.768 kHz TCXO
- Description:
  Ultra-Low Power, Ultra-Small 32.768 kHz or 16.384 kHz Oscillator
- Description:
  Ultra-Small Low-Jitter, 32.768-kHz ±100-ppm Oscillator
- Description:
  Ultra-Small Low-Jitter, 32.768 kHz ±50 ppm Oscillator
- Description:
  µPower, 32.768 kHz Quartz XTAL Replacement
- Description:
  Ultra-Small µPower, 32.768 kHz Quartz XTAL Replacement
- Description:
  Ultra-Small Low Power, ±5 ppm, 32.768 kHz TCXO with In-System Auto-Calibration
- Description:
  Ultra-Small, Low-Power, Low-Jitter, ±3 to ±5 ppm, 32.768 kHz TCXO
- Description:
  Ultra-Small µPower, ±5 to ±20 ppm, 32.768 kHz TCXO
- Description:
  Ultra-Small Low Power, 1 Hz to 462.5 kHz, ±50 ppm Oscillator
- Description:
  Ultra-Small µPower, 1 Hz to 32.768 kHz Oscillator
- Description:
  Ultra-Small, Low-Power, Low-Jitter, 1 Hz to 2.5 MHz Oscillator
- Description:
  Ultra-Small Low Power, Low-Jitter, 1 Hz to 2.5 MHz TCXO
- Description:
  1 to 26 MHz, Ultra-Small µPower Oscillator
- Description:
  High Frequency Automotive AEC-Q100 Active Resonator Drop-In Replacement for 4-pin SMD XTAL
- Description:
  Automotive AEC-Q100 Active Resonator Drop-In Replacement for 4-pin SMD XTAL
- Description:
  High frequency, -55°C to 125°C, Active Resonator Drop-In Replacement for 4-pin SMD XTAL
- Description:
  -55°C to 125°C, Active Resonator Drop-In Replacement for 4-pin SMD XTAL
- Description:
  High Frequency, High Temperature Active Resonator Drop-In Replacement for 4-pin SMD XTAL
- Description:
  High Temperature Active Resonator Drop-In Replacement for 4-pin SMD XTAL
- Description:
  Low Power Active Resonator Drop-In Replacement for 4-pin SMD XTAL
- Description:
  Low Power Active Resonator Drop-In Replacement for 4-pin SMD XTAL
- Description:
  ApexMEMS MHz Resonators, 0.18 mm2
- Description:
  SiT1252 Embedded MEMS kHz Resonator
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ORAN Distributed Unit

5G Open RAN brings greater flexibility to networks that are becoming increasingly dense with equipment deployed further from the core, sometimes in less-controlled environments. At the same time, these components need precise synchronization to avoid data packet loss and network interruptions.

This puts a greater demand on the distributed unit (DU) timing solution as it synchronizes the time reference from the core to the fronthaul switch and out to the RU. If the timing reference is lost, the DU must maintain an accurate output clock (holdover) until the connection to the reference is restored. SiTime provides a complete all-silicon MEMS clock tree that is more robust and easy to configure for accurate IEEE 1588 timing.

Download Application Brief

SiTime MEMS Timing Benefits

Complete MEMS clock tree

Precision MEMS OCXO

4 input network synchronizer

Integrated MEMS eliminate quartz reliability issues

More robust in real world conditions

±40 ppt/°C dF/dT for accurate IEEE 1588

I²C monitoring for simplified compensation

Immunity to board level noise

Easily configurable clocking

Hitless switching for minimal disruptions

Flexibility of 4 independent time domains

Low wander mode for optimal holdover

Clock Tree for Open RAN with IEEE 1588

Image: DU block diagram

Clock Tree for NPU Based Open RAN DU

Image: Microwave block diagram

MEMS Timing Solutions for Precision Synchronization

Devices	Function	Frequency	Key Features
SiT5711 OCXO	Stability Engine for IEEE 1588 Clock Recovery	1 to 60 MHz	±5 ppb, ±40 ppt/°C dF/dT
SiT5721 Digitally Controlled OCXO	Stability Engine for IEEE 1588 Clock Recovery	1 to 60 MHz	±40 ppt/°C dF/dT, I²C Programmable
SiT95147 Network Synchronizer	Monitor SyncE and eCPRI inputs, facilitate IEEE 1588 loop	8 kHz to 2.1GHz	120 fs jitter for SyncE, 4 inputs and 8 outputs
SiT95148 Network Synchronizer	Monitor SyncE and eCPRI inputs, facilitate IEEE 1588 loop	8 kHz to 2.1GHz	120 fs jitter for SyncE, 4 inputs and 11 outputs