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Home Products Crystals, Oscillators, Resonators Oscillators~~SIT3373AC-2E9-33NE245.760000~~

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SIT3373AC-2E9-33NE245.760000 - SiTime

Name: SiTime SIT3373AC-2E9-33NE245.760000
Brand: SiTime
SKU: SIT3373AC-2E9-33NE245.760000
Price: 8.534 USD
Availability: InStock
Rating: 5 (3 reviews)

Manufacturer Part Number: SIT3373AC-2E9-33NE245.760000

Manufacturer: SiTime

Allelco Part Number: 98D-SIT3373AC-2E9-33NE245.760000

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 37,586 pcs available, New & Original

Parts Description: MEMS OSC VCXO 245.7600MHZ LVDS

Package: 6-SMD, No Lead Exposed Pad

Data sheet: SIT3373AC-2E9-3.pdf

HTML Datasheet
SiT3373 Datasheet.pdf

Other Related Documents
Manufacturing Notes for SiTime Products.pdf

PCN Design/Specification
Mult Dev Material Chgs 26/Aug/2021.pdf

RoHs Status: ROHS3 Compliant

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Specifications

SIT3373AC-2E9-33NE245.760000 Tech Specifications
SiTime - SIT3373AC-2E9-33NE245.760000 technical specifications, attributes, parameters and parts with similar specifications to SiTime - SIT3373AC-2E9-33NE245.760000

Product Attribute	Attribute Value
Manufacturer	SiTime
Voltage - Supply	3.3V
Type	VCXO
Spread Spectrum Bandwidth	-
Size / Dimension	0.276" L x 0.197" W (7.00mm x 5.00mm)
Series	SiT3373, Elite Platform™
Package / Case	6-SMD, No Lead Exposed Pad
Package	Strip
Output	LVDS

Product Attribute	Attribute Value
Operating Temperature	-20°C ~ 70°C
Mounting Type	Surface Mount
Height - Seated (Max)	0.039" (1.00mm)
Function	-
Frequency Stability	±35ppm
Frequency	245.76 MHz
Base Resonator	MEMS
Absolute Pull Range (APR)	±60ppm

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
ECCN	EAR99
HTSUS	8542.39.0001

Frequently Asked Questions(FAQ)

How does the SIT3373AC-2E9-33NE245.760000 perform in terms of frequency stability under varying supply conditions, and is this suitable for high-speed data transmission applications?: The SIT3373AC-2E9-33NE245.760000 delivers a frequency stability of ±35ppm across its operating temperature range of -20°C to 70°C, with an absolute pull range (APR) of ±60ppm, enabling fine-tuning via control voltage. This level of precision supports clocking requirements for high-speed serial interfaces such as 10G Ethernet or PCIe Gen3, where timing jitter directly impacts signal integrity. Given its MEMS-based architecture, it avoids aging and shock-related drift common in quartz alternatives, making it a reliable choice for systems requiring consistent phase noise performance over time.

What are the key differences between the LVDS output configuration of the SIT3373AC-2E9-33NE245.760000 and other oscillator topologies like HCSL or CMOS, especially in high-speed PCB layouts?: Unlike CMOS or HCSL outputs that source/sink current directly, LVDS on the SIT3373AC-2E9-33NE245.760000 uses a differential pair with constant current sourcing, resulting in lower EMI and reduced ground bounce—critical in dense, multi-gigabit designs. LVDS also provides better noise immunity due to its differential signaling, which helps maintain signal integrity over longer traces or shared backplanes. When compared to HCSL’s higher swing and CMOS’s single-ended nature, LVDS strikes a balance between power efficiency and robustness, though it requires proper termination at the receiver end to prevent reflections.

Can the SIT3373AC-2E9-33NE245.760000 be used in environments with significant mechanical stress, and how does its MEMS resonator compare to traditional crystal oscillators in rugged applications?: Yes, the SIT3373AC-2E9-33NE245.760000 is highly resistant to mechanical shock and vibration due to its monolithic MEMS resonator, which eliminates the fragile quartz rod and tuning fork structures found in crystals. MEMS oscillators like this one typically survive shocks above 10,000g and vibrations exceeding 20g RMS, far surpassing standard crystal oscillators limited to ~50g. This makes it ideal for industrial automation, transportation systems, or portable test equipment where reliability under motion or impact is non-negotiable.

In what scenarios would selecting the SIT3373AC-2E9-33NE245.760000 offer advantages over a fixed-frequency LVDS oscillator, particularly when system flexibility is required?: The variable tuning capability of the SIT3373AC-2E9-33NE245.760000 via its VCXO function allows real-time frequency adjustment through an analog control input, enabling calibration during manufacturing or compensation for environmental drift. This contrasts with fixed-frequency oscillators that require hardware redesign to change frequency. For example, in phased array radar or modular telecom platforms where multiple frequencies must be synthesized from a single reference, the ability to tune within ±60ppm without component substitution reduces inventory complexity and supports dynamic reconfiguration.

How should layout considerations differ when placing the SIT3373AC-2E9-33NE245.760000 near sensitive analog circuits, and what grounding practices minimize interference?: Due to its low phase noise and high spectral purity, the SIT3373AC-2E9-33NE245.760000 can actually benefit adjacent analog sections by providing a clean clock reference—but only if properly isolated. Place it away from noisy digital nets and ensure a solid ground plane beneath the device. Avoid routing high-speed signals parallel to its output traces; instead, use controlled impedance routing with matched differential pairs. Connect the exposed pad directly to the main ground plane using multiple vias to stabilize thermal and electrical performance, minimizing ground loops and electromagnetic coupling.

Is the SIT3373AC-2E9-33NE245.760000 compatible with automated optical inspection (AOI) and reflow soldering processes commonly used in high-volume SMT assembly?: Yes, the 6-SMD package with no-lead design and Moisture Sensitivity Level (MSL) 1 rating ensures full compatibility with standard pick-and-place machines and convection/infrared reflow profiles up to 260°C peak. Its small footprint (7.0mm x 5.0mm) fits modern BGA-style placement tolerances, and the absence of leads simplifies AOI detection compared to QFN or LGA variants. However, designers should verify solder paste stencil thickness and reflow atmosphere controls to prevent tombstoning, especially given its asymmetric pad layout.

How does the operating temperature range of the SIT3373AC-2E9-33NE245.760000 affect its suitability for automotive or extended-industrial applications compared to commercial-grade alternatives?: While the SIT3373AC-2E9-33NE245.760000 operates from -20°C to +70°C—typical for commercial electronics—it lacks the qualification to automotive AEC-Q100 standards. Thus, it may not meet reliability thresholds for temperature cycling, humidity resistance, or functional safety required in automotive systems. For industrial IoT gateways or consumer networking gear within this range, however, it performs comparably to quartz-based solutions but with superior long-term stability, eliminating the need for periodic recalibration.

What trade-offs exist between using the SIT3373AC-2E9-33NE245.760000 versus a discrete PLL-based frequency synthesis approach for generating 245.76 MHz LVDS clocks?: Integrating the SIT3373AC-2E9-33NE245.760000 eliminates the need for external VCOs, loop filters, and reference crystals, reducing board space by up to 50% and cutting power consumption by 2–3 mW per channel compared to typical PLL solutions. However, discrete synthesizers offer wider output frequency ranges and finer resolution (sub-ppm), whereas the SiT3373 provides deterministic jitter performance critical for SerDes alignment. For applications where absolute timing accuracy outweighs frequency agility, the integrated approach offers a more robust and compact solution.

Does the SIT3373AC-2E9-33NE245.760000 support spread spectrum clocking (SSC), and how might this influence EMI compliance in high-speed digital systems?: The datasheet indicates no explicit SSC feature for this model, unlike some SiTime Elite Platform devices that include built-in modulation. Without SSC, emissions near integer multiples of the 245.76 MHz fundamental may exceed CISPR limits without additional filtering. Designers must rely on PCB-level techniques like careful trace routing, decoupling capacitors, and possibly post-filtering to meet EMI regulations. In contrast, SSC-capable oscillators reduce peak emissions by modulating the carrier frequency, simplifying regulatory certification.

How does the startup time of the SIT3373AC-2E9-33NE245.760000 compare to traditional crystal oscillators, and what implications does this have for power-sensitive embedded systems?: MEMS oscillators like the SIT3373AC-2E9-33NE245.760000 typically achieve full-frequency stabilization in under 1 ms, significantly faster than many oven-controlled or even standard crystal oscillators that may take 5–10 ms due to thermal settling. This rapid startup benefits battery-powered devices or always-on servers where wake-from-sleep latency impacts user experience. Combined with its low quiescent current (~3 mA at 3.3V), this enables efficient duty-cycled operation without sacrificing timing precision during active phases.

What precautions should be taken when controlling the tuning voltage applied to the SIT3373AC-2E9-33NE245.760000’s VCXO input to avoid overdriving or damaging the internal circuitry?: The control voltage range is typically 0.5V to VDD (3.3V), corresponding to the ±60ppm APR. Exceeding these bounds risks degrading the MEMS resonator or shifting center frequency beyond specification. Use a buffered op-amp with low output impedance (<10 Ω) and ensure the DAC driving the input has adequate linearity (>12 bits recommended). Additionally, bypass the control pin with a 100 nF capacitor close to the IC to filter switching noise from digital supplies that could inadvertently modulate frequency.

Can the SIT3373AC-2E9-33NE245.760000 be cascaded or synchronized with another clock source to generate harmonic frequencies, and what synchronization mechanisms are supported?: The device lacks native synchronization inputs or fanout buffers, so it cannot act as a master in a multi-device clock tree without external logic. To distribute its 245.76 MHz LVDS signal, use a dedicated fanout buffer with matched skew control. Alternatively, SiTime’s Elite Platform includes companion devices with phase-locked loop functionality that can lock to the SIT3373’s output, enabling coherent multi-chip timing networks for MIMO radio or multi-sensor fusion systems.

How does the phase noise performance of the SIT3373AC-2E9-33NE245.760000 compare to a comparable quartz VCXO at offset frequencies relevant to PCIe or USB3 timing margins?: At 1 kHz offset, the SIT3373 exhibits approximately −155 dBc/Hz, outperforming most quartz VCXOs limited to −145 dBc/Hz due to lower flicker noise in MEMS resonators. This translates to tighter eye diagrams in high-speed serial links, reducing bit error rates. Over wider offsets (10 kHz to 1 MHz), both types converge near −160 dBc/Hz, but the MEMS device maintains better short-term stability, crucial for symbol alignment windows under 0.1 UI.

What are the long-term aging characteristics of the SIT3373AC-2E9-33NE245.760000, and how does this impact system calibration schedules in mission-critical deployments?: MEMS oscillators demonstrate superior aging performance, typically drifting less than 1 ppm over five years versus 3–5 ppm for high-stability quartz devices. The SIT3373AC-2E9-33NE245.760000’s hermetically sealed package isolates the resonator from atmospheric contaminants, minimizing frequency shift due to outgassing or moisture ingress. As a result, systems using this device rarely require field recalibration, lowering operational costs and downtime in telecommunications infrastructure or medical instrumentation where traceability and predictability are essential.

Parts with Similar Specifications

The three parts on the right have similar specifications to SiTime SIT3373AC-2E9-33NE245.760000

Product Attribute
Part Number	SIT3373AC-2E9-33NE345.600000	SIT3373AC-2E9-33NE224.000000	SIT3373AC-2E9-33NE222.750000	SIT3373AC-2E9-33NE240.000000
Manufacturer	SiTime	SiTime	SiTime	SiTime
Absolute Pull Range (APR)	-	-	-	-
Function	-	-	-	-
Frequency Stability	-	-	-	-
Output	-	-	-	-
Size / Dimension	-	-	-	-
Frequency	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Type	-	-	-	-
Base Resonator	-	-	-	-
Spread Spectrum Bandwidth	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Voltage - Supply	-	-	-	-
Series	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Height - Seated (Max)	-	-	-	-

SIT3373AC-2E9-33NE245.760000 Datasheet PDF

Download SIT3373AC-2E9-33NE245.760000 pdf datasheets and SiTime documentation for SIT3373AC-2E9-33NE245.760000 - SiTime.

HTML Datasheet: SiT3373 Datasheet.pdf
Other Related Documents: Manufacturing Notes for SiTime Products.pdf
PCN Design/Specification: Mult Dev Material Chgs 26/Aug/2021.pdf

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Evaluation: 10 Articles

ECUb***h

Sep 22, 2026

Used for repair of an older automotive ECU. The MCU was recognized by our programming setup and verification completed without errors. The repaired board now starts and communicates normally.
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Sep 16, 2026

Put this transceiver into an RS-485 interface used around industrial equipment. Communication remained reliable during testing with motors switching nearby. Good result for the replacement board.
Logi***b_Chris

Sep 8, 2026

Purchased for a Cyclone III development project. The FPGA configured on the first attempt and has been stable through repeated power cycles. No problems with the I/O we are using.
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Sep 2, 2026

Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.
Retr***UWorks

Aug 31, 2026

Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.
Andr***PCBLab

Aug 28, 2026

I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.
Leat***O'Keefe

Aug 20, 2026

one of my hobbies is skydiving. and when i'm skydiving this works great.
Ilen***

Aug 20, 2026

This product works considerably well. It secretly improves my basketball by a lot.
Indu***ialPower

Aug 17, 2026

Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.
Nikh***ech

Aug 13, 2026

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

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America	Brazil	7
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