1 to 220 MHz, ±5 ppm Differential (VC)TCXO

The SiT5021 is a programmable differential MEMS TCXO that supports LVPECL and LVDS output signaling types. This differential oscillator covers any frequency between 1 to 220 MHz, with RMS phase jitter of 0.6 ps. The SiT5021 is available in any combination of voltage (2.5 V to 3.3 V), pull range, frequency stability (±5 ppm) and package (3225, 5032, 7050) options. This programmability enables designers to optimize the clock configuration while eliminating the long lead time and customization costs associated with quartz TCXOs where each frequency is custom built.

View related products: 220 to 625 MHz | Super-TCXOs

Industry standard packages as small as 2.5 x 2.0 mm for all frequencies, voltages, and stabilities
Oscillator Type TCXO-DE
Frequency 1 to 220 MHz
Frequency Stability (ppm) ±5
Phase Jitter (rms) 0.6 ps
Output Type LVPECL, LVDS
Operating Temperature Range (°C) -20 to +70, -40 to +85
Pull Range (ppm) ±12.5, 25, ±50
Voltage Supply (V) 2.5, 3.3, 2.25 to 3.63
Package Type (mm²) 3.2x2.5, 5.0x3.2, 7.0x5.0
Availability Production

Frequency stability ±5 ppm

  • Better timing margin that enhances system stability and robustness

Extensive programmability

  • Frequency from 1 to 220 MHz
  • LVPECL and LVDS output signaling types
  • Supply voltage of 2.5V and 3.3V
  • Frequency stability ±5 ppm:
  • Customized specifications for optimal system performance
  • Easy availability of any device specification within the operating range;

Three industry-standard packages

  • 100% drop-in replacement for quartz, SAW and overtone oscillators without any design changes;

4 to 6 weeks lead time

  • Reduce inventory overhead
  • Mitigate shortage risks


  • PCIe
  • 10G Ethernet
  • Fibre channel
  • System clocking

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Evaluation Boards (Contact SiTime– 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 – Preview packages with QFN 3D step models

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Resource Name Type
SiT5021 (LVDS, 2.5 V) IBIS Models
SiT5021 (LVDS, 3.3 V) IBIS Models
Silicon MEMS Reliability and Resilience 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 oscillators improve reliability and system performance in motor control applications White Papers
MEMS-Based Resonators and Oscillators are Now Replacing Quartz Presentations
Getting In Touch with MEMS: The Electromechanical Interface Presentations
SiT5021 Datasheet Datasheets
J-AN10006 発振器のPCBデザインのガイドライン Application Notes
AN10006 Best Design and Layout Practices Application Notes
AN10007 Clock Jitter Definitions and Measurement Methods Application Notes
J-AN10007 クロックジッタの定義と測定方法 Application Notes
SiTime発振器の信頼性計算方法 Technology Papers
AN10025 Reliability Calculations for SiTime Oscillators Application Notes
J-AN10028 プローブを使用した発振器の出力波形計測方法 Application Notes
AN10028 Probing Oscillator Output Application Notes
MEMSおよび水晶ベース発振器の電磁場感受率の比較 Technology Papers
Electromagnetic Susceptibility Comparison of MEMS and Quartz-based Oscillators Technology Papers
MEMS発振器と水晶発振器の性能比較(耐衝撃と耐振動) Technology Papers
Shock and Vibration Comparison of MEMS and Quartz-based Oscillators Technology Papers
J-AN10033 発振器の周波数測定ガイドライン Application Notes
AN10033 Frequency Measurement Guidelines for Oscillators Application Notes
J-AN10039 TCXOの周波数安定性および周波数精度バジェット Application Notes
AN10039 TCXO Frequency Stability and Frequency Accuracy Budget Application Notes
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™ プロセス技術 Technology Papers
SiTime's MEMS First™ and EpiSeal™ Processes 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 Application Notes
AN10029 Output Terminations for Differential Oscillators Application Notes
SC-AN10007 时钟抖动定义与测量方法 Application Notes
SC-AN10033 振荡器频率测量指南 Application Notes
Timing Solutions for Communications & Enterprise Brochures/Fliers
AN10062 Phase Noise Measurement Guide for Oscillators Application Notes
Phase Noise Measurement Tutorial Videos
Phase Noise Measurement Tutorial (Download MP4 Video) Videos
Whack an Oscillator Demo (Download MP4 Video) Videos
Whack an Oscillator Demo Videos
PCI Express Refclk Jitter Compliance using a Phase Noise Analyzer Presentations
Advantages of MEMS Timing - Parameters (Download MP4 Video) Videos
SiTime MEMS Oscillators - Revolutionizing the Timing Market (Download MP4 Video) Videos
SiTime MEMS Oscillators and Clock Generators at Electronics Summit (Download MP4 Video) Videos
QFN 3225 6-Pins 3D Step Models
QFN 5032 6-Pins 3D Step Models
QFN 7050 6-Pins 3D Step Models
SiTime MEMS Timing Solutions (8.5x11) Brochures/Fliers
SiTime MEMS Timing Solutions (A4) Brochures/Fliers
SiTime MEMS Timing Solutions (A4) Chinese Brochures/Fliers
SiTime MEMS First 工艺 Technology Papers