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HomeProductsCrystals, Oscillators, ResonatorsOscillatorsSIT9120AI-2D3-25E166.660000X
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SIT9120AI-2D3-25E166.660000X - SiTime

Manufacturer Part Number
SIT9120AI-2D3-25E166.660000X
Manufacturer
SiTime
Allelco Part Number
98D-SIT9120AI-2D3-25E166.660000X
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
42,326 pcs available, New & Original
Parts Description
-40 TO 85C, 7050, 50PPM, 2.5V, 1
Package
6-SMD, No Lead
Data sheet
SIT9120AI-2D3-2.pdf
RoHs Status
Lead free / RoHS Compliant
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Our certification
In stock: 42326
  • Unit Price: $2.767
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $2.767 $2.77
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

SIT9120AI-2D3-25E166.660000X Tech Specifications
SiTime - SIT9120AI-2D3-25E166.660000X technical specifications, attributes, parameters and parts with similar specifications to SiTime - SIT9120AI-2D3-25E166.660000X

Product Attribute Attribute Value
Manufacturer SiTime
Voltage - Supply 2.5V
Type XO (Standard)
Size / Dimension 0.276" L x 0.197" W (7.00mm x 5.00mm)
Series SiT9120
Ratings -
Packaging Tape & Reel (TR)
Package / Case 6-SMD, No Lead
Output LVDS
Other Names 1473-27675-2
SIT9120AI-2D3-25E166.660000X-ND
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Product Attribute Attribute Value
Moisture Sensitivity Level (MSL) 1 (Unlimited)
Manufacturer Standard Lead Time 5 Weeks
Lead Free Status / RoHS Status Lead free / RoHS Compliant
Height - Seated (Max) 0.039" (1.00mm)
Function Enable/Disable
Frequency Stability ±50ppm
Frequency 166.66MHz
Detailed Description 166.66MHz XO (Standard) LVDS Oscillator 2.5V Enable/Disable 6-SMD, No Lead
Current - Supply (Max) 55mA
Current - Supply (Disable) (Max) 35mA
Base Resonator MEMS
Absolute Pull Range (APR) -

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status Lead free / RoHS Compliant

Frequently Asked Questions(FAQ)

How does the SIT9120AI-2D3-25E166.660000X compare to a standard crystal oscillator in terms of frequency stability and long-term drift for high-reliability applications?
The SIT9120AI-2D3-25E166.660000X leverages SiTime’s MEMS-based architecture, which inherently provides superior frequency stability of ±50ppm over the industrial temperature range of -40°C to +85°C, significantly tighter than many traditional quartz-based oscillators that typically exhibit ±100ppm or wider tolerances. This reduced variation minimizes clock skew in synchronous systems and enhances timing integrity in data acquisition or communication interfaces where consistent phase alignment is critical.
What design considerations should be made when integrating the SIT9120AI-2D3-25E166.660000X into a 2.5V system with limited power budget?
With a supply current draw of 55mA at 2.5V, the SIT9120AI-2D3-25E166.660000X consumes 137.5mW, which must be evaluated against overall power constraints—especially in battery-powered or thermally sensitive environments. Engineers should verify that the power rail can sustain this load without voltage droop and consider thermal dissipation in densely populated PCBs. Additionally, disabling unused features or using shutdown modes (if available) may help reduce average power consumption during non-operational periods.
Can the SIT9120AI-2D3-25E166.660000X be used as a replacement for an LVCMOS-based oscillator in a legacy FPGA interface requiring LVDS signaling?
Yes, the SIT9120AI-2D3-25E166.660000X is specifically designed to output LVDS levels, making it directly compatible with FPGA transceivers and other LVDS receivers. Unlike LVCMOS outputs, LVDS uses differential signaling with lower noise susceptibility and reduced electromagnetic interference, improving signal integrity at high frequencies like 166.66MHz. However, ensure that the receiving device supports LVDS input thresholds; mismatched impedance or termination may degrade eye diagrams.
How does temperature-induced frequency shift affect the SIT9120AI-2D3-25E166.660000X, and what mitigation strategies exist for precision-critical designs?
Over its operating range from -40°C to +85°C, the SIT9120AI-2D3-25E166.660000X maintains ±50ppm stability, resulting in a maximum frequency deviation of approximately ±8.33kHz at 166.66MHz. While acceptable for most digital systems, applications such as high-speed serial links (e.g., PCIe Gen2 or SATA II) may require tighter margins. Mitigation includes selecting components with lower aging coefficients, implementing environmental controls, or calibrating system clocks periodically if absolute accuracy is mandated.
In comparison to discrete PLL-based clock generation solutions, what advantages does the integrated nature of the SIT9120AI-2D3-25E166.660000X offer?
The SIT9120AI-2D3-25E166.660000X eliminates the need for external reference crystals, dividers, and loop filters associated with PLL architectures. This reduces board space, component count, and potential sources of jitter. Moreover, its programmable configuration allows flexible frequency tuning without redesigning hardware, offering faster time-to-market and improved reliability due to fewer interconnects and solder joints.
What are the key differences between the SIT9120AI-2D3-25E166.660000X and similar SiT91xx series parts regarding package compatibility and pinout configuration?
All members of the SiT91xx family share the same SMD7050-6P footprint and pin assignment, enabling drop-in replacements across variants. However, differences arise in supply voltage (e.g., 1.8V vs. 2.5V), output type (LVDS vs. HCSL), and frequency options. For instance, the SIT9120AI-2D3-25E166.660000X operates at 2.5V with LVDS output, while other models might support lower voltages or different logic families—requiring careful verification of electrical compatibility before substitution.
How should layout practices be adjusted when placing the SIT9120AI-2D3-25E166.660000X near sensitive analog circuitry?
Due to its 55mA supply current and high-speed LVDS operation at 166.66MHz, the SIT9120AI-2D3-25E166.660000X generates significant switching noise. To minimize coupling into analog paths, maintain a minimum clearance of 3mm around the device, use dedicated ground planes with star-point connections, and route power traces with adequate decoupling capacitors (typically 100nF ceramic near VDD/VSS). Avoid parallel routing of clock lines with analog signals to prevent capacitive crosstalk.
Is the SIT9120AI-2D3-25E166.660000X suitable for automotive-grade applications requiring AEC-Q100 qualification?
The SIT9120AI-2D3-25E166.660000X is not specified for automotive environments under AEC-Q100 standards. Its commercial-grade operating temperature range (-40°C to +85°C) falls short of typical automotive requirements (+125°C maximum). Additionally, automotive systems often demand enhanced reliability testing beyond standard industrial conditions. Therefore, alternative SiTime products explicitly qualified to AEC-Q100 Grade 2 or higher should be considered for vehicular designs.
What impact does supply voltage tolerance have on the performance of the SIT9120AI-2D3-25E166.660000X in variable-voltage systems?
Although the datasheet specifies nominal operation at 2.5V, real-world implementations may experience slight voltage fluctuations. Assuming a ±5% margin (±0.125V), the device remains functional within 2.375V–2.625V. However, excessive deviation could affect rise/fall times, output amplitude, and phase noise characteristics. Designers should ensure stable regulation via LDOs or low-dropout regulators, especially since current draw scales linearly with voltage per P = IV.
How does the SIT9120AI-2D3-25E166.660000X handle startup behavior compared to mechanically tuned crystal oscillators?
Unlike quartz resonators that can exhibit microphonic effects or slow settling due to physical vibration, the SIT9120AI-2D3-25E166.660000X relies on electrostatic actuation, offering faster startup times (<1ms typical) and immunity to shock or vibration. This makes it ideal for mobile and ruggedized platforms where mechanical stability cannot be guaranteed. Startup time also benefits system initialization sequences by reducing boot latency.
Can the frequency of the SIT9120AI-2D3-25E166.660000X be reprogrammed post-manufacturing, and how does this flexibility benefit iterative development?
Yes, the SIT9120AI-2D3-25E166.660000X supports in-system programming via I²C interface, allowing users to adjust the output frequency without replacing hardware. This enables rapid prototyping, calibration during manufacturing, or field updates—particularly valuable when final frequency requirements evolve late in development or when supporting multiple product SKUs from a single PCB layout.
In a multi-oscillator system, how does the phase noise profile of the SIT9120AI-2D3-25E166.660000X influence synchronization accuracy across distributed nodes?
At 166.66MHz, low phase noise ensures minimal jitter accumulation over time, preserving timing relationships in synchronized networks such as IEEE 1588 Precision Time Protocol (PTP) setups or multi-sensor fusion systems. SiTime’s MEMS technology delivers < -150 dBc/Hz offset 1 kHz from carrier, reducing bit error rates in high-speed serial links and improving deterministic latency—critical for real-time control loops.
What precautions are necessary when storing or transporting the SIT9120AI-2D3-25E166.660000X prior to assembly?
Since the SIT9120AI-2D3-25E166.660000X is shipped in Tape & Reel (TR) packaging, proper ESD handling procedures must be followed to avoid damage to internal circuits. Store in anti-static bags at controlled humidity (<60% RH) and temperature (15°C–30°C) to prevent moisture absorption, which could compromise solder joint quality during reflow. Avoid prolonged exposure to extreme temperatures or static discharges above 100V HBM.
How does the choice between single-ended and differential outputs affect system EMI when using the SIT9120AI-2D3-25E166.660000X?
The LVDS output of the SIT9120AI-2D3-25E166.660000X inherently suppresses common-mode noise through differential signaling, lowering radiated emissions compared to single-ended CMOS outputs. This reduces susceptibility to electromagnetic interference and simplifies compliance with FCC and CE regulations. Proper termination resistors (typically 100Ω across differential pairs) further enhance signal integrity and reduce reflections at 166.66MHz.
What role does aging play in the long-term performance of the SIT9120AI-2D3-25E166.660000X, and how should it be accounted for in mission-critical deployments?
MEMS oscillators like the SIT9120AI-2D3-25E166.660000X exhibit slower aging rates than quartz alternatives—typically less than ±3 ppm/year after burn-in. Over five years, this translates to a cumulative shift of ~±15 ppm, well within the initial ±50ppm specification. Nevertheless, systems requiring decade-long stability (e.g., telecom infrastructure) may need periodic re-calibration or selection of grades with lower aging coefficients to meet total lifetime accuracy budgets.
How does the SIT9120AI-2D3-25E166.660000X perform under rapid thermal cycling compared to traditional resonator technologies?
The solid-state construction of the SIT9120AI-2D3-25E166.660000X avoids issues like stress fractures or fatigue seen in crystalline materials under thermal cycling. It withstands repeated transitions between -40°C and +85°C without degradation in stability or reliability, making it preferable for harsh environments where mechanical stress accumulates over time—such as industrial automation or aerospace peripherals.
What trade-offs exist between frequency resolution and output drive strength when configuring the SIT9120AI-2D3-25E166.660000X?
The device offers programmable resolution down to sub-Hz increments, enabling precise frequency synthesis. However, finer step sizes may slightly increase lock time or introduce quantization noise. Meanwhile, LVDS output drivers provide strong differential swing (~350mV), ensuring robust signal transmission over longer traces. Engineers must balance these factors based on application needs—high-resolution tuning for instrumentation versus fast settling for burst-mode communications.
How can the SIT9120AI-2D3-25E166.660000X be validated in production test environments to ensure conformance to timing specifications?
Production validation should include measuring actual output frequency using calibrated counters or spectrum analyzers under worst-case conditions (min/max supply, extremes of temperature). Key metrics include rise/fall times, jitter histograms, and phase noise profiles. Automated test scripts leveraging I²C commands allow batch reprogramming and verification of programmed values, ensuring each SIT9120AI-2D3-25E166.660000X meets factory-set parameters before shipping.

Parts with Similar Specifications

The three parts on the right have similar specifications to SiTime SIT9120AI-2D3-25E166.660000X

Product Attribute SIT9120AI-2D3-25E166.666000X SIT9120AI-2D3-25E166.600000X SIT9120AI-2D3-25E166.660000 SIT9120AI-2D3-25E166.660000Y
Part Number SIT9120AI-2D3-25E166.666000X SIT9120AI-2D3-25E166.600000X SIT9120AI-2D3-25E166.660000 SIT9120AI-2D3-25E166.660000Y
Manufacturer SiTime SiTime SiTime SiTime
Current - Supply (Max) - - - -
Function - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Manufacturer Standard Lead Time - - - -
Output - - - -
Frequency - - - -
Lead Free Status / RoHS Status - - - -
Size / Dimension - - - -
Base Resonator - - - -
Other Names - - - -
Series - - - -
Moisture Sensitivity Level (MSL) - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Current - Supply (Disable) (Max) - - - -
Frequency Stability - - - -
Type - - - -
Detailed Description - - - -
Ratings - - - -
Voltage - Supply - - - -
Height - Seated (Max) - - - -
Packaging - - - -
Absolute Pull Range (APR) - - - -
Mounting Type - Surface Mount Through Hole Surface Mount

SIT9120AI-2D3-25E166.660000X Datasheet PDF

Download SIT9120AI-2D3-25E166.660000X pdf datasheets and SiTime documentation for SIT9120AI-2D3-25E166.660000X - SiTime.

Datasheets
SiT9120 Datasheet.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

  • Embe***dMotion
    Aug 5, 2026

    Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

  • FPGA***dio
    Jul 30, 2026

    This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

  • Nord***mbedded
    Jul 20, 2026

    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

  • Arch***ct
    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

  • Nath***oleman
    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

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SIT9120AI-2D3-25E166.660000X Image

SIT9120AI-2D3-25E166.660000X

SiTime
98D-SIT9120AI-2D3-25E166.660000X

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