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Home Products Crystals, Oscillators, Resonators Oscillators~~VMQF576D25-66.500-1.0/-40+85~~

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VMQF576D25-66.500-1.0/-40+85 - Mercury United Electronics, Inc.

Name: Mercury United Electronics, Inc. VMQF576D25-66.500-1.0/-40+85
Brand: Mercury United Electronics, Inc.
SKU: VMQF576D25-66.500-1.0/-40+85
Price: 16.45 USD
Availability: InStock
Rating: 5 (5 reviews)

Manufacturer Part Number: VMQF576D25-66.500-1.0/-40+85

Manufacturer: Mercury United Electronics

Allelco Part Number: 98D-VMQF576D25-66.500-1.0/-40+85

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 32,945 pcs available, New & Original

Parts Description: XTAL OSC VCTCXO 66.5000MHZ LVDS

Package: 6-SMD, No Lead

Data sheet: VMQF576D25-66.5.pdf

Datasheets
MQF576, VMQF576.pdf

RoHs Status: RoHS Compliant

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Specifications

VMQF576D25-66.500-1.0/-40+85 Tech Specifications
Mercury United Electronics, Inc. - VMQF576D25-66.500-1.0/-40+85 technical specifications, attributes, parameters and parts with similar specifications to Mercury United Electronics, Inc. - VMQF576D25-66.500-1.0/-40+85

Product Attribute	Attribute Value
Manufacturer	Mercury United Electronics
Voltage - Supply	2.5V
Type	VCTCXO
Spread Spectrum Bandwidth	-
Size / Dimension	0.276" L x 0.197" W (7.00mm x 5.00mm)
Series	QuikXO
Ratings	-
Package / Case	6-SMD, No Lead
Package	Strip
Output	LVDS

Product Attribute	Attribute Value
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Height - Seated (Max)	0.102" (2.60mm)
Function	Amplitude Control
Frequency Stability	±1ppm
Frequency	66.5 MHz
Current - Supply (Max)	23mA (Typ)
Current - Supply (Disable) (Max)	18mA (Typ)
Base Resonator	Crystal
Absolute Pull Range (APR)	±8ppm

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.60.0060

Frequently Asked Questions(FAQ)

What are the key electrical characteristics of the VMQF576D25-66.500-1.0/-40+85 VCTCXO that influence its suitability for high-precision clock distribution in communication systems?: The VMQF576D25-66.500-1.0/-40+85 operates at a nominal frequency of 66.5 MHz with an exceptionally tight frequency stability of ±1 ppm across the industrial temperature range (-40°C to +85°C). This level of precision makes it well-suited for applications requiring low phase noise and stable timing, such as baseband processing or synchronous data transmission. Its LVDS output ensures compatibility with differential signaling standards while minimizing electromagnetic interference. With a supply current draw of 23 mA (typical), it balances performance with moderate power consumption, making it viable for space-constrained embedded designs.

How does the amplitude control function in the VMQF576D25-66.500-1.0/-40+85 affect system-level jitter performance when interfacing with programmable logic devices?: The VMQF576D25-66.500-1.0/-40+85 includes built-in amplitude control, which allows dynamic adjustment of output signal strength to match downstream receiver thresholds. This feature is particularly valuable in multi-drop or long-trace environments where signal attenuation can degrade timing margins. By enabling fine-tuning of output swing, the oscillator helps maintain consistent setup and hold times in FPGAs or ASICs, thereby reducing bit error rates in serial links. However, excessive adjustment may introduce additional phase noise if not managed within the oscillator’s specified APR of ±8 ppm.

In what scenarios would the VMQF576D25-66.500-1.0/-40+85 be preferred over a standard crystal oscillator despite its higher cost and complexity?: The VMQF576D25-66.500-1.0/-40+85 offers distinct advantages in applications demanding frequency agility and environmental resilience. Unlike fixed-frequency crystals, this VCTCXO provides electronic tuning via voltage-controlled pull range, allowing minor frequency adjustments without hardware changes—beneficial in calibration routines or compensation for thermal drift. Combined with its ±1 ppm stability and LVDS output, it outperforms basic crystal oscillators in systems like wireless transceivers or precision test equipment where both accuracy and flexibility are critical.

What are the implications of the VMQF576D25-66.500-1.0/-40+85’s Moisture Sensitivity Level (MSL) rating of 2 when designing PCB assembly processes?: With an MSL rating of 2 (requiring handling precautions up to 1 year after dry pack removal), the VMQF576D25-66.500-1.0/-40+85 mandates adherence to IPC/JEDEC J-STD-033 guidelines during reflow soldering. Operators must ensure components are used within one year of unsealing and stored in controlled humidity below 30% RH if reworked. Failure to comply risks popcorning or delamination due to moisture absorption, especially given its 6-SMD, no-lead package geometry. Proper bake-out procedures before reflow are essential to preserve reliability.

How does the VMQF576D25-66.500-1.0/-40+85 compare to alternative timing solutions like MEMS-based oscillators in terms of long-term drift and shock resistance for ruggedized electronics?: While MEMS oscillators often exhibit lower initial tolerance and comparable short-term stability, the VMQF576D25-66.500-1.0/-40+85 leverages quartz crystal technology, which historically demonstrates superior aging characteristics—typically under 1 ppm per year—compared to many MEMS devices that may drift up to 5–10 ppm/year. Additionally, the solid-state construction of the mercury United Electronics VCTCXO offers better mechanical robustness against vibration and shock, making it more suitable for automotive or defense applications where long-term stability outweighs the potential benefits of MEMS miniaturization.

Can the VMQF576D25-66.500-1.0/-40+85 be used reliably in battery-powered edge computing nodes operating in extreme ambient temperatures?: Yes, the VMQF576D25-66.500-1.0/-40+85 is rated for operation from -40°C to +85°C, aligning with common industrial and automotive grade requirements. However, designers must account for its typical supply current of 23 mA, which significantly impacts battery life in low-power edge devices. Although the device itself consumes relatively modest power for a tunable oscillator, integrating it into a duty-cycled system or using external sleep modes can mitigate energy concerns. The ±1 ppm stability ensures reliable synchronization even under rapid thermal transients.

What design considerations apply when routing the LVDS output from the VMQF576D25-66.500-1.0/-40+85 to minimize skew and EMI in high-speed digital backplanes?: Due to its LVDS interface, the VMQF576D25-66.500-1.0/-40+85 requires tightly coupled differential pairs routed with controlled impedance (typically 100 Ω) and matched trace lengths to preserve signal integrity. Minimizing stubs and avoiding vias near the output pins reduces reflections. Given its small footprint (7.00 mm × 5.00 mm), placement should prioritize short interconnects to destination ICs. Termination resistors placed close to the load further reduce ringing. Shielding sensitive nets and maintaining adequate ground return paths help suppress radiated emissions, especially important in dense PCB layouts.

Is the VMQF576D25-66.500-1.0/-40+85 compatible with automated optical inspection (AOI) during mass production, and how does its package facilitate process integration?: The 6-SMD, no-lead package of the VMQF576D25-66.500-1.0/-40+85 is designed for surface mount automation and is fully compatible with standard AOI systems due to its uniform solder pad layout and absence of protruding leads. This enhances defect detection during manufacturing by providing clear visual reference points for alignment and bridging defects. The compact size also supports high-density placements on strip packaging, streamlining pick-and-place operations while maintaining process yield across large-scale production runs.

How does the absolute pull range (APR) of ±8 ppm in the VMQF576D25-66.500-1.0/-40+85 enable frequency trimming without compromising stability?: The ±8 ppm APR defines the maximum total deviation achievable through voltage control while staying within calibrated limits. This enables system-level compensation for crystal aging or temperature-induced drift without resorting to external dividers or multipliers. For instance, if initial calibration offsets a few ppm, the remaining headroom allows dynamic correction during runtime. As long as adjustments remain within the ±8 ppm window, core stability (±1 ppm) is preserved, ensuring reliable operation without sacrificing precision.

What role does the QuikXO series platform play in supporting design reuse with the VMQF576D25-66.500-1.0/-40+85?: As part of Mercury United Electronics’ QuikXO family, the VMQF576D25-66.500-1.0/-40+85 inherits standardized pinouts, mechanical footprints, and functional interfaces across variants. This enables engineers to reuse existing schematics and board layouts when scaling projects—such as deploying multiple frequencies within the same product line—reducing development time and risk. Consistent performance parameters like LVDS output and 2.5V supply simplify BOM management and qualification efforts, accelerating time-to-market for iterative designs.

How should the disable state current specification (18 mA typ.) of the VMQF576D25-66.500-1.0/-40+85 inform power budgeting in always-on monitoring systems?: Although labeled "disable," the 18 mA (typical) supply current in shutdown mode still represents non-negligible leakage for ultra-low-power applications. In battery-operated monitoring nodes, even this standby draw can accumulate over days or weeks. Designers should evaluate whether partial shutdown (e.g., via enable pin pulsing) sufficiently reduces average consumption or if alternative oscillators with sub-µA sleep currents would better align with system energy targets. The VMQF576D25-66.500-1.0/-40+85 remains optimal only when continuous high-stability timing justifies the baseline current overhead.

Does the RoHS compliance status of the VMQF576D25-66.500-1.0/-40+85 impact material selection for conformal coating or potting compounds in harsh environments?: Yes, the RoHS-compliant nature of the VMQF576D25-66.500-1.0/-40+85 ensures lead-free termination finishes and restricted hazardous substances, simplifying regulatory approval but influencing coating choices. Some traditional potting resins contain halogens that may corrode lead-free solder joints under high humidity; thus, inert, non-halogenated encapsulants are recommended. Conformal coatings must also avoid aggressive solvents that could damage the crystal or laminate substrate. Compatibility testing between selected materials and the oscillator’s epoxy encapsulation is advised prior to deployment.

What are the trade-offs involved in selecting the VMQF576D25-66.500-1.0/-40+85 versus a lower-cost fundamental-mode crystal oscillator for a 5G fronthaul timing reference?: While fundamental-mode crystals offer lower unit cost, they lack tunability and typically exhibit worse stability (often ±20 ppm or higher) and higher phase noise. The VMQF576D25-66.500-1.0/-40+85’s ±1 ppm stability and amplitude control provide necessary margin for stringent 5G timing budgets, reducing bit errors and sync failures. The added expense is justified in network infrastructure where reliability and field recalibration avoidance outweigh upfront savings. However, for non-critical auxiliary clocks, simpler alternatives may suffice without impacting overall system performance.

How does the height-seated maximum (2.60 mm) of the VMQF576D25-66.500-1.0/-40+85 constrain placement in slim-profile IoT gateways?: At 2.60 mm tall, the VMQF576D25-66.500-1.0/-40+85 fits within many thin enclosure designs, but clearance around adjacent components—especially heat sinks or connectors—must be verified. Its 0.276" length also limits routing density along the board edge. In ultra-compact IoT devices, alternative vertical-mount oscillators might offer better space efficiency, but the SMD format generally simplifies automated assembly. Thermal expansion effects near tall components should be assessed to avoid stress-induced frequency shifts during temperature cycling.

Can the VMQF576D25-66.500-1.0/-40+85 support spread spectrum modulation for EMI reduction in consumer electronics applications?: Although the datasheet does not explicitly list spread spectrum bandwidth capability, the VMQF576D25-66.500-1.0/-40+85’s architecture may allow limited SS modulation through external control loops. However, implementing effective spread spectrum requires careful characterization of sideband suppression and phase noise degradation. Given its narrow stability spec (±1 ppm), introducing intentional frequency modulation must stay within acceptable jitter boundaries. Consultation with manufacturer application notes is advised before assuming compatibility with consumer EMI mitigation strategies.

What documentation or validation artifacts are recommended when qualifying the VMQF576D25-66.500-1.0/-40+85 for aerospace or medical certification?: Beyond standard datasheets, engineers should request full test reports covering aging, shock, vibration, and thermal cycling per relevant MIL-STD or IEC standards. Electrical characterization under worst-case process corners (e.g., min/max capacitance, supply ripple) ensures robust performance across all conditions. Traceability to specific lot numbers and failure analysis reports enhance audit readiness. Given the ECCN EAR99 classification, export compliance documentation should also accompany procurement records for international projects.

How does the crystal resonator type in the VMQF576D25-66.500-1.0/-40+85 contribute to its immunity against electromagnetic interference in RF-congested environments?: The use of a high-Q crystal resonator inherently provides excellent rejection of spurious signals outside the passband, reducing susceptibility to adjacent-channel interference. Coupled with LVDS output’s differential signaling, which cancels common-mode noise, the VMQF576D25-66.500-1.0/-40+85 maintains clean clock edges even near strong RF sources. This dual-layer filtering is particularly beneficial in mixed-signal systems where analog and digital domains share physical proximity, minimizing timing corruption from radiated coupling.

What steps should be taken to verify long-term reliability when substituting the VMQF576D25-66.500-1.0/-40+85 into an existing design originally using a competitor’s VCTCXO?: Begin by comparing key electrical and mechanical parameters: supply voltage, output type, frequency tolerance, package dimensions, and temperature range. Ensure PCB footprint matches the new part’s land pattern and that decoupling networks are compatible. Perform accelerated life testing (e.g., 85°C/85% RH for 1000 hours) to assess moisture sensitivity and bias stress effects. Validate amplitude control functionality across the entire tuning range, and confirm frequency stability meets system jitter budgets under thermal extremes before committing to volume production.

Parts with Similar Specifications

The three parts on the right have similar specifications to Mercury United Electronics, Inc. VMQF576D25-66.500-1.0/-40+85

Product Attribute
Part Number	VMQF576D25-66.000-1.0/-40+85	VMQF576D25-65.000-1.0/-40+85	VMQF576D25-625.000-1.0/-40+85	VMQF576D25-64.000-1.0/-40+85
Manufacturer	Mercury United Electronics, Inc.	Mercury United Electronics, Inc.	Mercury United Electronics, Inc.	Mercury United Electronics, Inc.
Type	-	-	-	-
Series	-	-	-	-
Size / Dimension	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Current - Supply (Max)	-	-	-	-
Ratings	-	-	-	-
Output	-	-	-	-
Frequency	-	-	-	-
Current - Supply (Disable) (Max)	-	-	-	-
Function	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Spread Spectrum Bandwidth	-	-	-	-
Frequency Stability	-	-	-	-
Height - Seated (Max)	-	-	-	-
Base Resonator	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Voltage - Supply	-	-	-	-
Absolute Pull Range (APR)	-	-	-	-

VMQF576D25-66.500-1.0/-40+85 Datasheet PDF

Download VMQF576D25-66.500-1.0/-40+85 pdf datasheets and Mercury United Electronics, Inc. documentation for VMQF576D25-66.500-1.0/-40+85 - Mercury United Electronics, Inc..

Datasheets: MQF576, VMQF576.pdf

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Customer Reviews

Evaluation: 10 Articles

Nord***mbedded

Jul 20, 2026

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

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