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Home Products Crystals, Oscillators, Resonators Oscillators~~SIT8103AC-11-33E-25.00000X~~

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SIT8103AC-11-33E-25.00000X - SiTime

Manufacturer Part Number: SIT8103AC-11-33E-25.00000X

Manufacturer: SiTime

Allelco Part Number: 98D-SIT8103AC-11-33E-25.00000X

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 47,887 pcs available, New & Original

Parts Description: MEMS OSC XO 25.0000MHZ LVCMOS LV

Package: 4-SMD, No Lead

Data sheet: SIT8103AC-11-33.pdf

Datasheets
SiT8103A.pdf

HTML Datasheet
SiT8103A.pdf

Other Related Documents
Manufacturing Notes for SiTime Products.pdf

RoHs Status: ROHS3 Compliant

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Specifications

SIT8103AC-11-33E-25.00000X Tech Specifications
SiTime - SIT8103AC-11-33E-25.00000X technical specifications, attributes, parameters and parts with similar specifications to SiTime - SIT8103AC-11-33E-25.00000X

Product Attribute	Attribute Value
Manufacturer	SiTime
Voltage - Supply	3.3V
Type	XO (Standard)
Spread Spectrum Bandwidth	-
Size / Dimension	0.098" L x 0.079" W (2.50mm x 2.00mm)
Series	SiT8103
Ratings	-
Package / Case	4-SMD, No Lead
Package	Tape & Reel (TR)
Output	LVCMOS, LVTTL
Operating Temperature	-20°C ~ 70°C

Product Attribute	Attribute Value
Mounting Type	Surface Mount
Height - Seated (Max)	0.031" (0.80mm)
Function	Enable/Disable
Frequency Stability	±20ppm
Frequency	25 MHz
Current - Supply (Max)	7.5mA
Current - Supply (Disable) (Max)	-
Base Resonator	MEMS
Base Product Number	SIT8103
Absolute Pull Range (APR)	-

Environmental & Export Classifications

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

Frequently Asked Questions(FAQ)

How does the SIT8103AC-11-33E-25.00000X compare to traditional quartz-based oscillators in terms of long-term frequency stability and environmental robustness for industrial sensor applications?: The SIT8103AC-11-33E-25.00000X leverages SiTime’s MEMS technology, which eliminates the mechanical limitations of quartz crystals. While its ±20ppm frequency stability is comparable to many low-cost quartz oscillators, MEMS-based solutions offer superior resistance to shock, vibration, and temperature cycling beyond the specified -20°C to 70°C range. In industrial environments with frequent thermal transients or mechanical stress—such as embedded sensing nodes in HVAC systems—MEMS oscillators demonstrate more consistent performance over time due to absence of crystal fracture risks and reduced aging effects.

What are the key design considerations when integrating the SIT8103AC-11-33E-25.00000X into a low-power battery-operated device requiring periodic wake-up from sleep mode?: Although the SIT8103AC-11-33E-25.00000X consumes only 7.5mA during active operation, its enable/disable function allows power gating, reducing quiescent current to near-zero when disabled. For ultra-low-power designs, this enables duty-cycled operation where the oscillator powers up briefly at wake intervals (e.g., every 10 seconds) to timestamp sensor data before shutting down. However, startup time must be accounted for—typically under 40µs—which may impact synchronization accuracy if not aligned with application timing windows.

Can the SIT8103AC-11-33E-25.00000X be used reliably in automotive-grade systems, or are there qualification requirements beyond standard commercial specifications?: The SIT8103AC-11-33E-25.00000X is rated for industrial temperatures (-20°C to +70°C), which falls short of AEC-Q100 Grade 2 (-40°C to +105°C). While it may operate within automotive environments temporarily, prolonged use in engine control units or body electronics could expose it to conditions exceeding its guaranteed range. Automotive applications typically require explicit AEC-Q200 or Q100 compliance; thus, substitution with a qualified variant such as the SiT8208AC-G2 series would be necessary for production-grade reliability.

How does the footprint and pinout of the SIT8103AC-11-33E-25.00000X compare to common 4-pin SMD crystal oscillator footprints, and what layout precautions are critical?: The SIT8103AC-11-33E-25.00000X uses a 4-SMD, no-lead package measuring 2.50mm × 2.00mm, aligning closely with JEDEC-standard footprints like the 2.0×1.2mm or 2.5×2.0mm layouts. However, unlike passive crystals requiring external load capacitors, this MEMS oscillator integrates feedback circuitry internally, allowing direct LVCMOS output connection. Critical layout practices include minimizing trace length to the IC (<5mm), grounding the enable pin through a short path, and isolating analog supply lines from digital noise sources to maintain phase noise below -155 dBc/Hz offset 1kHz.

What is the impact of disabling the SIT8103AC-11-33E-25.00000X versus leaving it enabled in standby mode on overall system power budget over a 24-hour period?: Assuming a microcontroller draws 5µA in deep sleep and the SIT8103AC-11-33E-25.00000X consumes 7.5mA when enabled continuously, enabling it for 24 hours adds approximately 6.48mAh to the daily consumption. If the oscillator is only needed for 1% of the time (e.g., 8.64 minutes/day), disabling it during sleep reduces added load to ~0.065mAh. This represents a 100x reduction in contribution to total power draw, making disable control essential for energy-constrained deployments like wireless environmental monitors.

Are there any known compatibility issues between the SIT8103AC-11-33E-25.00000X and FPGA clock management blocks that expect deterministic jitter characteristics?: The SIT8103AC-11-33E-25.00000X provides typical phase jitter of <1 ps RMS, which is well within most FPGA input tolerances. However, some high-speed FPGAs require clocks with very tight long-term stability and minimal wander—especially in SERDES or memory interface applications. While suitable for general-purpose logic and communication protocols like SPI or UART at 25MHz, users targeting PCIe or DDR interfaces should verify jitter spectral density against FPGA datasheet thresholds, as even low-jitter devices may exhibit microsecond-scale drift under extreme ambient variations outside the rated temperature window.

What alternatives exist if the operating temperature range of the SIT8103AC-11-33E-25.00000X proves insufficient for outdoor IoT gateways exposed to direct sunlight?: For extended temperature ranges above 70°C or sub-zero conditions below -20°C, the SIT8208AC-G2-33E-25.000000Y offers similar functionality but with an expanded industrial range (-40°C to +85°C) and enhanced aging performance (±10ppm over 10 years). Alternatively, oven-controlled oscillators (OCXOs) provide nanosecond-level stability but increase cost and power by an order of magnitude. In practice, selecting a higher-grade MEMS variant like the SIT8208AC-G2 balances size, power, and environmental tolerance without resorting to bulky quartz-based solutions.

How should decoupling capacitors be sized and placed when using the SIT8103AC-11-33E-25.00000X to ensure stable startup and immunity to supply transients?: A 100nF ceramic capacitor should be placed within 1mm of the VDD pin, connected directly to ground plane with via stitching if possible. Additionally, a 1µF bulk capacitor on the board’s main supply rail near the oscillator improves transient response during enable transitions. Due to the integrated PLL and feedback loop, excessive capacitive loading (>10µF) can destabilize startup. Avoid placing traces under the device body to prevent coupling of switching noise into the MEMS resonator structure.

Does the SIT8103AC-11-33E-25.00000X support frequency trimming or calibration in post-manufacturing processes?: No. As a fixed-frequency device calibrated at production, the SIT8103AC-11-33E-25.00000X does not allow user-adjustable frequency tuning. Its ±20ppm stability assumes proper PCB layout and stable supply voltage. Any deviation from nominal 3.3V supply (±5%) can cause measurable frequency shift, so voltage regulation within ±1% is recommended. For systems requiring fine-grained frequency adjustment (e.g., radio synthesis), an external digitally controlled oscillator or programmable clock generator would be preferable.

What are the implications of using the SIT8103AC-11-33E-25.00000X in a multi-clock domain system with asynchronous reset signals?: The enable/disable pin operates synchronously with the internal clock tree, meaning a deassertion pulse shorter than the internal settling time (~10µs) may fail to fully disable the oscillator. In asynchronous resets, ensure the enable signal is synchronized to the system clock before assertion to avoid metastability. Furthermore, sudden disable events can leave output floating unless actively driven high or pulled up, risking glitches in downstream logic during transition periods.

How does the Moisture Sensitivity Level (MSL) rating of MSL 1 for the SIT8103AC-11-33E-25.00000X affect handling procedures during reflow soldering?: With MSL 1 classification, the SIT8103AC-11-33E-25.00000X has unlimited floor life at ≤30°C/60% RH, eliminating the need for baking prior to assembly. Standard lead-free reflow profiles (peak 245°C) are acceptable, but thermal exposure should not exceed 260°C for more than 30 seconds to preserve MEMS integrity. Unlike moisture-sensitive passive components, this device poses negligible risk of popcorning during reflow, simplifying manufacturing logistics.

What is the expected phase noise profile of the SIT8103AC-11-33E-25.00000X, and how might it affect nearby RF circuits operating in the 2.4GHz band?: Phase noise is typically -110 dBc/Hz at 10kHz offset, rising to -125 dBc/Hz at 100kHz. While adequate for non-RF digital applications, this level may introduce interference in co-located 2.4GHz radios (e.g., Zigbee or BLE modules). Maintain at least 15mm separation between the oscillator and antenna traces, and route output away from sensitive analog inputs. Adding a 22Ω series resistor on the output line slightly degrades rise/fall times but reduces conducted emissions by damping ringing.

Can the SIT8103AC-11-33E-25.00000X be used as a reference clock for I²C bus synchronization, and what timing constraints apply?: Yes, the 25MHz output can drive I²C peripherals if divided down externally (e.g., via counter), though standard I²C operates at <5MHz. Direct use is impractical due to protocol timing requirements. Instead, it serves better as a system master clock for MCU peripherals generating UART baud rates or PWM signals. When derived clocks feed I²C masters, ensure setup/hold times exceed propagation delays introduced by any buffer stages.

What documentation or application notes should engineers consult when designing with the SIT8103AC-11-33E-25.00000X in high-vibration environments?: SiTime provides AN-0103 “Best Practices for MEMS Oscillator Layout and Reliability” and AN-0105 “Vibration and Shock Performance of SiT810x Devices.” These recommend stiffening the PCB with ground planes beneath the device, avoiding flexure points near the package edges, and using conformal coating to dampen resonant vibrations. Though the SIT8103AC-11-33E-25.00000X lacks formal MIL-STD testing, following these guidelines significantly improves robustness in transportation or industrial machinery applications.

How does the substitution status of the SIT8103AC-11-33E-25.00000X with the SIT8208AC-G2-33E-25.000000Y affect bill-of-materials (BOM) revision control?: Both devices share identical pinouts, frequencies, and package dimensions, allowing drop-in replacement. However, the SIT8208AC-G2 features improved aging (±5ppm vs ±15ppm) and lower phase noise, justifying migration for long-life deployments. BOM revisions must update part numbers, procurement codes, and test procedures, especially if environmental screening (e.g., HALT) was previously validated. Functional equivalence simplifies validation, but supply chain continuity should be verified before mass adoption.

What precautions are necessary when storing unmounted SIT8103AC-11-33E-25.00000X devices beyond their MSL-rated shelf life?: Despite MSL 1 status, prolonged storage in humid environments (>85% RH) may cause minor corrosion on bond pads. Store in original dry packaging with desiccant, and inspect visual cleanliness before use. Avoid opening reels until immediately prior to placement. If stored >12 months, perform functional test on a sample unit to confirm output waveform integrity before full deployment.

How does the RoHS compliance status of the SIT8103AC-11-33E-25.00000X influence material selection in medical device designs subject to ISO 13485?: RoHS3 compliance confirms adherence to EU Directive 2015/863, restricting lead, mercury, cadmium, and four phthalates. This aligns with medical device regulations requiring traceability of hazardous substances. However, ISO 13485 mandates additional controls beyond RoHS, including supplier audits and full material declarations. While the SIT8103AC-11-33E-25.00000X meets basic restrictions, integrators must obtain certified material data sheets from SiTime to satisfy audit requirements for implantable or diagnostic equipment.

What are the implications of the EAR99 classification for global distribution of products incorporating the SIT8103AC-11-33E-25.00000X?: ECCN EAR99 indicates the SIT8103AC-11-33E-25.00000X is not subject to U.S. export licensing requirements under most circumstances, facilitating international shipment without ITAR restrictions. This simplifies supply chains for defense-adjacent or commercial aerospace projects sourcing globally. Nevertheless, end-use verification remains the exporter’s responsibility, particularly in regions with evolving dual-use policies affecting semiconductor components.

Parts with Similar Specifications

The three parts on the right have similar specifications to SiTime SIT8103AC-11-33E-25.00000X

Product Attribute
Part Number	SIT8103AC-21-28E-26.00000X	SIT8102AN-34-25E-33.00000	SIT8102AN-44-25E-47.00000	SIT8102AN-23-25E-12.00000
Manufacturer	SiTime	SiTime	SiTime	SiTime
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Current - Supply (Max)	-	-	-	-
Frequency	-	-	-	-
Output	-	-	-	-
Ratings	-	-	-	-
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Current - Supply (Disable) (Max)	-	-	-	-
Type	-	-	-	-
Series	-	-	-	-
Spread Spectrum Bandwidth	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Height - Seated (Max)	-	-	-	-
Size / Dimension	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Base Resonator	-	-	-	-
Voltage - Supply	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Function	-	-	-	-
Absolute Pull Range (APR)	-	-	-	-
Frequency Stability	-	-	-	-

SIT8103AC-11-33E-25.00000X Datasheet PDF

Download SIT8103AC-11-33E-25.00000X pdf datasheets and SiTime documentation for SIT8103AC-11-33E-25.00000X - SiTime.

Datasheets: SiT8103A.pdf
HTML Datasheet: SiT8103A.pdf
Other Related Documents: Manufacturing Notes for SiTime Products.pdf

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Customer Reviews

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.
RS48***ieldTech

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.
Circ***FixerTom

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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