1 to 340 MHz I2C/SPI Programmable Oscillator

The SiT3521 is an ultra-low jitter, user programmable oscillator. This device is based on SiTime's Elite Platform™ that utilizes unique DualMEMS™ temperature sensing and TurboCompensation™ technology to deliver exceptional dynamic performance, making it:

  • Resistant to airflow and thermal shock
  • Resistant to shock and vibration
  • Superior power supply noise rejection

The device supports two in-system programming options:
   1) Any-frequency mode to reprogram the clock output to any frequency between 1 MHz to 340 MHz
   2) Digitally controlled oscillator (DCO) mode to steer or pull the clock up to ±3200 ppm

Combined with wide frequency range and user programmability, this device is ideal for telecom, networking and industrial applications that require a variety of frequencies and operate in noisy environments.

 

I2C/SPI programmable oscillators in small 5.0 x 3.2 mm packages
Oscillator Type I2C/SPI ISP XO-DE
Frequency 1 to 340 MHz
Frequency Stability (ppm) ±20, ±25, ±50
Operating Temperature Range (°C) -20 to +70, -40 to +85
Output type LVPECL, LVDS, HCSL
Package Type (mm²) 5.0 x 3.2 10-pin
Phase Jitter (RMS) ≤ 0.23 ps
Features In-System Programmable via I2C/SPI
Voltage Supply (V) 2.5 to 3.3
Pull Range (ppm) ±25, ±50, ±80, ±100, ±125, ±150, ±200, ±400, ±600, ±800, ±1200, ±1600, ±3200
Availability Production

In-system programmable from 1 MHz and 340 MHz via I2C/SPI

Digital frequency pulling (DCO) via I2C/SPI

  • Output frequency pulling with perfect pull linearity

  • 13 programmable pull range options to ±3200 ppm

  • Frequency pull resolution as low as 5 ppt (0.005 ppb)

Dynamic performance

  • 0.1 ppb/g, superior shock and vibration resistance

  • No activity dips or micro jumps

Integrated LDO for on-chip power supply noise filtering

  • 0.05 ps/mV power supply noise rejection (PSNR)

  • Reduces BOM by eliminating a LDO

Programmable LVPECL, LVDS, or HCSL output

  • Programmable LVPECL, LVDS Swing

  • LVDS Common Mode Voltage Control

  • Optimizes signal integrity

Superior reliability

  • 1 billion hours MTBF

  • Lifetime Warranty: Reduces repair costs and field failures due to clock components

  • 10G to 100G Ethernet
  • SONET
  • Data centers
  • Test and measurement

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Electronics Industry Citizen Coalition Template Other Quality Documents
Electronics Industry Citizen Coalition Template Other Quality Documents
Manufacturing Notes for SiTime Oscillators Other Quality Documents
SiTime Conflict Metal Declaration Other Quality Documents
SiTime Conflict Metal Declaration Other Quality Documents
SiTime Environmental Policy Other Quality Documents
SiTime Environmental Policy Other Quality Documents
SiTime Warranty on Date Code (16.72 kB) Other Quality Documents
SiTime Warranty on Date Code (16.72 kB) Other Quality Documents
ISO9001:2015 Certificate of Registration Other Quality Documents
Conflict Minerals Reporting Template Other Quality Documents
4L/6L-QFN Package Homogeneous Materials and SGS Report RoHS/Reach/Green Certificates
4L/6L-QFN Package Homogeneous Materials and SGS Report RoHS/Reach/Green Certificates

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Resource Name Type
AN10006 Best Design and Layout Practices Application Notes
AN10006 Best Design and Layout Practices Application Notes
AN10007 Clock Jitter Definitions and Measurement Methods Application Notes
AN10007 Clock Jitter Definitions and Measurement Methods Application Notes
AN10025 Reliability Calculations for SiTime Oscillators Application Notes
AN10025 Reliability Calculations for SiTime Oscillators Application Notes
AN10028 Probing Oscillator Output Application Notes
AN10028 Probing Oscillator Output Application Notes
AN10033 Frequency Measurement Guidelines for Oscillators Application Notes
AN10033 Frequency Measurement Guidelines for Oscillators Application Notes
SiTime's MEMS First™ and EpiSeal™ Processes Technology Papers
SiTime's MEMS First™ and EpiSeal™ Processes Technology Papers
SiT3521 Datasheet Datasheets
AN10050 I2C/SPI Programmable Oscillators Application Notes
AN10050 I2C/SPI Programmable Oscillators Application Notes
AN10052 IEEE 1588 Precision Time Protocol (PTP) in ITU-T Standards Application Notes
AN10052 IEEE 1588 Precision Time Protocol (PTP) in ITU-T Standards Application Notes
AN10029 Output Terminations for Differential Oscillators Application Notes
AN10029 Output Terminations for Differential Oscillators Application Notes
DualMEMS and TurboCompensation Temperature Sensing Technology Technology Papers
DualMEMS and TurboCompensation Temperature Sensing Technology Technology Papers
SC-AN10007 时钟抖动定义与测量方法 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
SiTime MEMS First 工艺 Application Notes
Timing Solutions for Communications & Enterprise MEMS Timing Solution Brochures/Fliers
AN10062 Phase Noise Measurement Guide for Oscillators Application Notes
AN10062 Phase Noise Measurement Guide for Oscillators Application Notes
Phase Noise Measurement Tutorial Videos
Phase Noise Measurement Tutorial Videos
Phase Noise Measurement Tutorial (Download MP4 Video) Videos
Phase Noise Measurement Tutorial (Download MP4 Video) Videos
PCI Express Refclk Jitter Compliance using a Phase Noise Analyzer Presentations
PCI Express Refclk Jitter Compliance using a Phase Noise Analyzer Presentations
SiTime MEMS Oscillators - Revolutionizing the Timing Market (Download MP4 Video) Videos
SiTime MEMS Oscillators - Revolutionizing the Timing Market (Download MP4 Video) Videos
Jitter Part 1: Principles and Practice with an Overview of Period Jitter (Download MP4 Video) Videos
Jitter Part 2: Phase Noise and Phase Jitter (Download MP4 Video) Videos
Jitter Part 3: C2C Jitter and Long Term Jitter (Download MP4 Video) Videos
Jitter Part 1: Principles and Practice with an Overview of Period Jitter Videos
Jitter Part 2: Phase Noise and Phase Jitter Videos
Jitter Part 3: C2C Jitter and Long Term Jitter Videos
QFN 5032 10-Pins 3D Step Models
QFN 5032 10-Pins 3D Step Models
AN10066 LVDS Output with 600 mV to 1200 mV Swing Application Notes
SiTime MEMS Timing Solutions (8.5x11) MEMS Timing Solution Brochures/Fliers
SiTime MEMS Timing Solutions (A4) MEMS Timing Solution Brochures/Fliers