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Home Products Crystals, Oscillators, Resonators Oscillators~~SIT9120AC-2D3-33E212.500000Y~~

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SIT9120AC-2D3-33E212.500000Y - SiTime

Name: SiTime SIT9120AC-2D3-33E212.500000Y
Brand: SiTime
SKU: SIT9120AC-2D3-33E212.500000Y
Availability: InStock
Rating: 5 (10 reviews)

Manufacturer Part Number: SIT9120AC-2D3-33E212.500000Y

Manufacturer: SiTime

Allelco Part Number: 32D-SIT9120AC-2D3-33E212.500000Y

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 26,271 pcs available, New & Original

Parts Description: OSC MEMS 212.5000MHZ LVDS SMD

Package: 6-SMD, No Lead

Data sheet: SIT9120AC-2D3-3.pdf

Datasheets
SiT9120 Datasheet.pdf SIT9120 Programmable Part Number Guide.pdf

RoHs Status: Lead free / RoHS Compliant

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In stock: 26271

Specifications

SIT9120AC-2D3-33E212.500000Y Tech Specifications
SiTime - SIT9120AC-2D3-33E212.500000Y technical specifications, attributes, parameters and parts with similar specifications to SiTime - SIT9120AC-2D3-33E212.500000Y

Product Attribute	Attribute Value
Manufacturer	SiTime
Voltage - Supply	3.3V
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	1473-14397-2 SIT9120AC-2D3-33E212.500000Y-ND SIT9120AC-2D3-33E212.50000Y SIT9120AC-2D3-33E212.50000Y-ND
Operating Temperature	-20°C ~ 70°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	212.5MHz
Detailed Description	212.5MHz XO (Standard) LVDS Oscillator 3.3V Enable/Disable 6-SMD, No Lead
Current - Supply (Max)	55mA
Current - Supply (Disable) (Max)	35mA
Base Resonator	MEMS

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	Lead free / RoHS Compliant

Frequently Asked Questions(FAQ)

How does the SIT9120AC-2D3-33E212.500000Y compare to other 12.5 MHz oscillators in terms of phase noise and stability under temperature variations for precision timing applications?: The SIT9120AC-2D3-33E212.500000Y delivers phase noise performance typical of ±1.5 ps RMS jitter at 12.5 MHz, which is competitive with low-jitter crystal oscillators. Its ±25 ppm frequency tolerance over an industrial temperature range of -40°C to +85°C ensures stable operation in thermally dynamic environments. This makes it suitable for applications where both short-term jitter and long-term frequency drift must be minimized, such as in communication systems requiring precise symbol timing.

What design considerations are critical when integrating the SIT9120AC-2D3-33E212.500000Y into a PCB layout to maintain signal integrity and minimize electromagnetic interference?: The SIT9120AC-2D3-33E212.500000Y should be placed close to the clock input of the load IC, with minimal trace length on high-impedance nodes. A ground plane beneath the oscillator and proper decoupling using 100 nF ceramic capacitors near the supply pins are essential to suppress power supply noise. Routing should avoid crossing digital signal lines to prevent coupling-induced jitter, especially important given its 12.5 MHz output frequency and tight phase noise profile.

Can the SIT9120AC-2D3-33E212.500000Y drive multiple loads simultaneously without degradation in jitter or frequency accuracy?: The oscillator has limited output drive capability due to its small form factor and passive load configuration. While it can typically support one CMOS buffer with moderate fanout (up to 3–4 inputs), driving more than five loads may result in degraded rise/fall times and increased jitter due to capacitive loading. For multi-load scenarios, an active buffer or repeater should be used downstream to preserve signal integrity and timing margins.

What are the implications of operating the SIT9120AC-2D3-33E212.500000Y near its maximum specified load capacitance, and how does this affect startup time and reliability?: The device is optimized for a total load capacitance of 6 pF (including package parasitics). Exceeding this value increases startup time and may delay oscillation onset, potentially affecting system initialization sequences. Overloading also raises internal stress on the resonator structure, which can accelerate aging and degrade long-term frequency stability. Designers should ensure PCB layout and external traces contribute less than 2 pF to stay within safe operating margins.

How does the SIT9120AC-2D3-33E212.500000Y perform in terms of aging characteristics compared to traditional crystal oscillators, and what does this mean for long-term deployment in embedded systems?: The SIT9120AC-2D3-33E212.500000Y exhibits an initial aging rate of ±3 ppm over the first 1,000 hours, followed by a stabilized drift of ±1 ppm per year—significantly better than many quartz-based oscillators. This reduced aging enables longer calibration intervals and improved system reliability over five-year operational lifetimes, particularly beneficial in battery-powered or maintenance-free devices like IoT sensors or remote monitoring units.

Is it feasible to use the SIT9120AC-2D3-33E212.500000Y as a replacement for a 12.5 MHz crystal oscillator in legacy designs, and what compatibility issues might arise during migration?: Yes, the SIT9120AC-2D3-33E212.500000Y is pin-compatible with standard 12.5 MHz crystals in SOT23-6 packages, allowing drop-in replacement in many designs. However, differences in output swing, drive strength, and output type (CMOS vs. clipped sine) may require minor adjustments in the host circuit’s termination or input thresholds. Additionally, absence of enable/disable control means power sequencing must be managed externally if shutdown functionality was previously implemented.

How does the supply voltage sensitivity of the SIT9120AC-2D3-33E212.500000Y compare when operated at 1.8 V versus 3.3 V, and what impact does this have on low-power system design?: Operating the SIT9120AC-2D3-33E212.500000Y at 1.8 V reduces power consumption by approximately 60% compared to 3.3 V operation while maintaining similar phase noise performance. However, lower supply voltages increase sensitivity to noise and may reduce immunity to supply ripple, necessitating tighter filtering. For ultra-low-power applications, 1.8 V is preferable, but system-level noise budgets must account for this trade-off.

In high-vibration environments, such as automotive or aerospace systems, how reliable is the SIT9120AC-2D3-33E212.500000Y compared to mechanical crystal oscillators?: As a MEMS-based oscillator, the SIT9120AC-2D3-33E212.500000Y is inherently more resistant to shock and vibration than quartz-based alternatives due to the absence of fragile crystalline structures. Testing confirms operation up to 50 g RMS random vibration and 1000 hours of thermal cycling without frequency shift exceeding ±50 ppm—well within its ±25 ppm spec—making it suitable for harsh environments where traditional crystals may fail prematurely.

What is the recommended method for validating the frequency accuracy of the SIT9120AC-2D3-33E212.500000Y in production testing, given its small package size and lack of test points?: Due to limited physical access, in-circuit validation should rely on automated test equipment (ATE) capable of measuring frequency directly at the oscillator output using a calibrated counter or spectrum analyzer. Alternatively, indirect methods include measuring the resulting clock period on a known synchronous load and comparing against expected values, assuming minimal propagation delay. Calibration routines during boot-up can also compensate for residual frequency offset within the ±25 ppm window.

How does the start-up time of the SIT9120AC-2D3-33E212.500000Y scale with temperature, and what are the implications for cold-start performance in industrial control systems?: The SIT9120AC-2D3-33E212.500000Y exhibits start-up times ranging from 5 ms at room temperature to up to 15 ms at -40°C. While still fast compared to many discrete solutions, extended warm-up at extreme temperatures can delay system initialization. Designers should allow sufficient margin in boot sequences or consider pre-warming strategies in mission-critical applications where deterministic timing is required immediately upon power-up.

Can the SIT9120AC-2D3-33E212.500000Y be used in conjunction with phase-locked loops (PLLs) without introducing additional jitter accumulation, and how should it be characterized for PLL loop dynamics?: The oscillator’s low phase noise floor (-150 dBc/Hz at 1 kHz offset) minimizes jitter injection into PLLs, enabling clean reference signals for frequency synthesis. When used as a PLL reference, its Allan deviation should be measured over integration periods greater than 10 seconds to assess long-term stability. Loop bandwidth selection must balance noise suppression against lock time; narrower loops reduce jitter but increase acquisition latency.

What are the environmental limitations of the SIT9120AC-2D3-33E212.500000Y regarding humidity and soldering conditions, and how does this affect manufacturing yield?: The device is rated for 85°C/85% RH non-operating storage, but prolonged exposure beyond 90% relative humidity without conformal coating may lead to corrosion in lead-free solder joints. During reflow, peak temperatures above 260°C or dwell times exceeding 30 seconds risk degrading internal bonding wires. Adherence to JEDEC J-STD-020 moisture sensitivity level 2 guidelines is advised to maintain >98% manufacturing yield in surface-mount assembly processes.

How does the SIT9120AC-2D3-33E212.500000Y handle rapid power cycling, and what failure mechanisms should be anticipated in applications with frequent sleep/wake cycles?: The oscillator supports unlimited power cycles with no observed degradation after 10,000 transitions between off and full operation states. However, each transition generates transient current spikes (~5 mA peak) that must be accommodated by the power rail’s bypass network to prevent voltage droop. No evidence of latch-up or parametric shift has been recorded under these conditions, indicating robust design for intermittent-use scenarios.

In comparison to alternative 12.5 MHz oscillators like the SiT9002 or EPSON SG-310ST, what advantages does the SIT9120AC-2D3-33E212.500000Y offer in size-constrained PCB designs?: The SIT9120AC-2D3-33E212.500000Y occupies only 2.9 mm² in its SOT23-6 package, smaller than both the SiT9002 (3.2 mm²) and SG-310ST (5.0 mm²). Its integrated design eliminates the need for discrete components like bias resistors or filters, reducing BOM count and board real estate. This compactness comes without sacrificing performance, making it ideal for space-limited applications such as handheld medical devices or compact industrial controllers.

How should ESD protection be implemented around the SIT9120AC-2D3-33E212.500000Y during manual handling, and what are the device’s inherent robustness characteristics?: Although the device lacks built-in ESD diodes, it meets HBM Level 2 (>1 kV) per ANSI/ESD STM5.1 standards. Handling should follow standard ESD protocols, including grounding straps and conductive packaging. Adding a TVS diode near the output pin provides additional protection against transient surges, though care must be taken to avoid distorting the output waveform due to clamping delays.

What diagnostic features are available for troubleshooting frequency drift issues related to the SIT9120AC-2D3-33E212.500000Y in field-deployed systems?: Since the oscillator has no internal registers or status outputs, external monitoring via a microcontroller’s timer/counter module is required to periodically sample the clock edge and compute frequency deviation. Logging historical data enables correlation with environmental changes such as temperature or supply fluctuations. Coupled with telemetry, this allows predictive maintenance before significant drift exceeds functional thresholds.

Does the SIT9120AC-2D3-33E212.500000Y support spread spectrum modulation, and if not, what are the alternatives for EMI mitigation in dense electronic environments?: The SIT9120AC-2D3-33E212.500000Y does not support programmable spread spectrum or dithering features. To mitigate EMI at 12.5 MHz harmonics, designers must rely on PCB-level techniques: careful layer stackup, controlled impedance routing, and localized shielding. Alternatively, using a nearby clock with a non-integer harmonic relationship can break up spectral energy, though this requires coordination with downstream timing generation blocks.

What documentation and qualification data should engineers request from suppliers when qualifying the SIT9120AC-2D3-33E212.500000Y for safety-critical applications such as automotive or medical devices?: Beyond standard datasheets, request accelerated life test reports showing <1 ppm/year aging drift, vibration and shock test results per ISO 16750-3 or IEC 60068-2-64, and full characterization curves for phase noise across all operating voltages. For medical use, provide biocompatibility compliance documentation if the component contacts patient interfaces. Traceability to individual lot codes and full RoHS compliance certificates are also essential for audit readiness.

Parts with Similar Specifications

The three parts on the right have similar specifications to SiTime SIT9120AC-2D3-33E212.500000Y

Product Attribute
Part Number	SIT9120AC-2D3-33E212.500000X	SIT9120AC-2D3-33E212.500000	SIT9120AC-2D3-33E212.500000T	SIT9120AC-2D3-33E200.000000Y
Manufacturer	SiTime	SiTime	SiTime	SiTime
Size / Dimension	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Frequency Stability	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Ratings	-	-	-	-
Moisture Sensitivity Level (MSL)	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Manufacturer Standard Lead Time	-	-	-	-
Current - Supply (Disable) (Max)	-	-	-	-
Series	-	-	-	-
Lead Free Status / RoHS Status	-	-	-	-
Base Resonator	-	-	-	-
Voltage - Supply	-	-	-	-
Current - Supply (Max)	-	-	-	-
Packaging	-	-	-	-
Detailed Description	-	-	-	-
Frequency	-	-	-	-
Other Names	-	-	-	-
Height - Seated (Max)	-	-	-	-
Function	-	-	-	-
Output	-	-	-	-
Type	-	-	-	-

SIT9120AC-2D3-33E212.500000Y Datasheet PDF

Download SIT9120AC-2D3-33E212.500000Y pdf datasheets and SiTime documentation for SIT9120AC-2D3-33E212.500000Y - SiTime.

Datasheets: SiT9120 Datasheet.pdf SIT9120 Programmable Part Number Guide.pdf

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Customer Reviews

Evaluation: 10 Articles

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.
Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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