1 to 220 MHz, Differential Digitally-controlled XO

The SiT3921 is a highly flexible, differential DCXO with LVPECL and LVDS outputs. This programmable device supports any frequency, 1 to 220 MHz, along with any combination of voltage (1.8 V, 2.5 V-3.3 V), pull range (±25 ppm to ±200 ppm) and package (3225, 5032, 7050). It enables frequency tuning via a unique one-wire interface, eliminating frequency drift that is caused by board noise and simplifying PLL and clock synchronization design. It comes in 3 industry-standard 6-pin packages (3.2x2.5 mm, 5.0x3.2 mm, 7.0x5.0 mm).

View related products:220 to 625 MHz|I2C/SPI digital control

Oscillator Type DCXO-DE
Frequency 1 to 220 MHz
频率稳定性(PPM) ±10,±25,±50
阶段抖动(RMS) 0.5 PS.
工作温度范围(°C) -20至+70,-40至+85
Pull Range (ppm) ±25, ±50, ±100, ±200, ±400, ±800, ±1600
Voltage Supply (V) 2.5,3.3
Package Type (mm²) 3.2x2.5, 5.0x3.2, 7.0x5.0
Features Digitally controlled, Field Programmable
Availability Production
  • Digitally controlled 1 ppb frequency pull resolution
  • 频率从1 MHz到220 MHz
  • Supply voltage of 1.8 V; 2.5 V to 3.3 V
  • Frequency stability from ±10 ppm to ±50 ppm
  • Pull range from ±25 ppm to ±1600 ppm:
  • Eliminating a need for external DAC
  • 定制规范,以获得最佳系统性能
  • Easy availability of any device specifications within the operating range

One-wire digital frequency tuning

  • 软件控制系统PLL中的更简单的环路控制
  • 更一致的PLL带宽在工作范围内
  • Faster calibration and lock time
  • Reduction of modulation harmonics;

Three industry-standard packages

  • Minor modification to existing design using VCXO to adopt the DCXO;


  • 减少库存开销
  • Mitigate shortage risks

  • 网络和通信系统
  • Networked video systems and digitizers
  • 抖动清洁剂
  • Networked audio systems
  • Instrumentation
  • Low-bandwidth analog phase locked loop (PLL)
  • FPGA data recovery


Evaluation Boards (联系Silime.– SiT6097 (3225) | SiT6086 (5032) | SiT6085 (7050)

Reliability Calculator– Get FIT/MTBF data for various operating conditions

Frequency Slope (dF/dT) Calculator– Calculate frequency slope over temperature

qfn 3225 6-pins|QFN 5032 6-Pins|qfn 7050 6-pins- 使用QFN预览包3D step models


资源名称 Type
硅MEMS可靠性和弹性 Presentations
Performance Comparison: Silicon MEMS Verses Quartz Oscillators Presentations
How to Measure Clock Jitter in Precision Timing Applications Presentations
How to Measure Phase Jitter and Phase Noise in Precision Timing Applications Presentations
Silicon MEMS vs Quartz Supply Chain Presentations
MEMS-Based Resonators and Oscillators are Now Replacing Quartz Presentations
Getting In Touch with MEMS: The Electromechanical Interface Presentations
SiT3921 Datasheet 数据表s
J-AN10006 発振器のPCBデザインのガイドライン 申请笔记
AN10006最佳设计和布局实践 申请笔记
AN10007 Clock Jitter Definitions and Measurement Methods 申请笔记
J-AN10007 クロックジッタの定義と測定方法 申请笔记
sit発振器の信頼性計算方法 Technology Papers
AN10025 Reliability Calculations for SiTime Oscillators 申请笔记
J-AN10028プローブプローブ使使使しししたのの波形波形计测方法 申请笔记
AN10028 Probing Oscillator Output 申请笔记
MEMSおよび水晶ベース発振器の電磁場感受率の比較 Technology Papers
基于MEMS和石英振荡器的电磁敏感性比较 Technology Papers
MEMS発振器材と水晶仪器のの比较(耐冲撃と移动) Technology Papers
基于MEMS和石英振荡器的冲击和振动比较 Technology Papers
J-AN10033 発振器の周波数測定ガイドライン 申请笔记
AN10033 Frequency Measurement Guidelines for Oscillators 申请笔记
J-AN10041 DCXO SIT39XXシリーズを使っ设计 申请笔记
AN10041 Designing with the SiT39xx Family of DCXOs (Digitally Controlled Oscillators) 申请笔记
シリコンMEMS発振器の耐性および信頼性 Technology Papers
Resilience and Reliability of Silicon MEMS Oscillators Technology Papers
SITIMEのMEMS FIRST™プロセス技术 Technology Papers
stime的MEMS First™和Episeal™流程 Technology Papers
MEMS Resonator Advantages - How MEMS Resonators Work Part 2 Presentations
How to Measure Long-term Jitter and Cycle-to-cycle Jitter in Precision Timing Applications Presentations
Silicon MEMS Oscillator Frequency Characteristics and Measurement Techniques Presentations
AN10052 IEEE 1588 Precision Time Protocol (PTP) in ITU-T Standards 申请笔记
AN10029差分振荡器的输出端接 申请笔记
SC-AN10007 时钟抖动定义与测量方法 申请笔记
SC-AN10033振荡频率销量江南 申请笔记
AN10062振荡器相位噪声测量指南 申请笔记
Phase Noise Measurement Tutorial Videos
Phase Noise Measurement Tutorial (Download MP4 Video) Videos
PCI使用相位噪声分析仪表达REFCLK抖动符合性 Presentations
MEMS时序的优点 - 参数(下载MP4视频) Videos
硅替换石英(中文字幕)(下载MP4视频) Videos
硅替换石英(日本字幕)(下载MP4视频) Videos
sitMEMS Oscillators - Revolutionizing the Timing Market (Download MP4 Video) Videos
Electronics Summit的环境MEMS振荡器yabo体育手机版和时钟发生器(下载MP4视频) Videos
sit's Time Machine II - Part 1: How to Install Oscillator Programming Software (Download MP4 Video) Videos
sit's Time Machine II - Part 2: How to Program Field Programmable Oscillators (Download MP4 Video) Videos
qfn 3225 6-pins 3D步骤模型
QFN 5032 6-Pins 3D步骤模型
qfn 7050 6-pins 3D步骤模型
sitMEMS Timing Solutions (8.5x11) Brochures/Fliers
sitMEMS Timing Solutions (A4) Brochures/Fliers
sitMEMS Timing Solutions (A4) Chinese Brochures/Fliers
Silicon Replaces Quartz (Japanese Subtitles) Videos
硅取代石英(中文字幕) Videos
sitMEMS First 工艺 Technology Papers