1 to 60 MHz, Stratum 3E DCOCXO

The SiT5721 is the industry’s smallest Stratum 3E digitally controlled OCXO with ±5 ppb frequency stability and ±40 ppt/°C frequency slope (ΔF/ΔT). This device is engineered to provide the best dynamic performance. Leveraging SiTime’s unique DualMEMS™ and TurboCompensation™ temperature sensing technology, this DCOCXO delivers the most stable timing in the presence of environmental stressors such as airflow, temperature perturbation, vibration, shock, and electromagnetic interference (EMI).


  • 可以放在PCB上的任何地方
  • No mechanical cover or shielding needed for thermal isolation
  • 无需外部监管机构
  • No additional sealing needed for high humidity environments

The SiT5721 can be factory-programmed to any frequency between 1 and 60 MHz. In addition to industry leading performance, the DCOCXO is offered in a 9 x 7 mm package, the smallest Stratum 3E OCXO available.

World's smallest DCOCXO, 75% smaller footprint and 40% thinner
Oscillator Type DCOCXO
Frequency 1 to 60 MHz
频率稳定性(PPM) ±0.005 (±5 ppb), ±0.008 (±8 ppb)
输出类型 LVCMOS, Clipped sinewave
工作温度范围(°C) -20 to 70, -40 to +80
Pull Range (ppm) ±6.25
Voltage Supply (V) 3.3
Package Type (mm²) 9.0 x 7.0
Features Frequency Slope: ±40 ppt/°C; Contact SiTime for ±3 ppb stability; Contact SiTime for -40° to 105°C;
可用性 采样


  • ±5 ppb过度。稳定性
  • 2E-11 ADEV在10秒下的气流
  • ±40 ppt/°C frequency slope (ΔF/ΔT)

Unmatched ease-of-use, simplifying system design

  • No restrictions on PCB placement
  • 无电隔离所需的机械屏蔽
  • Resistant to humidity
  • No external regulator needed


  • 9 x 7 mm footprint, 75% smaller
  • 6.5毫米高,40%更薄

20 times better vibration resistance, ideal for outdoor pole mounted equipment

Resistant to microphonic and/or board bending effects, ideal for large telecom PCBs

可编程平台消除了与遗产Quartz DCocxo相关的长期交付时间和定制成本

  • Any frequency from 1 to 60 MHz
  • LVCMOS or clipped sine-wave outputs

On-chip regulators, no need for external LDOs or ferrite beads



  • SONET / SDH Stratum 3E
  • 4G/5G RRH, DU
  • 基站
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  • Carrier class switches
  • IEEE 1588 boundary clocks
  • IEEE 1588 grandmasters
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