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Home Products Crystals, Oscillators, Resonators Oscillators~~25QHM572D0.25-14.4756~~

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25QHM572D0.25-14.4756 - Mercury United Electronics, Inc.

Name: Mercury United Electronics, Inc. 25QHM572D0.25-14.4756
Brand: Mercury United Electronics, Inc.
SKU: 25QHM572D0.25-14.4756
Price: 7.17 USD
Availability: InStock
Rating: 5 (8 reviews)

Manufacturer Part Number: 25QHM572D0.25-14.4756

Manufacturer: Mercury United Electronics

Allelco Part Number: 98D-25QHM572D0.25-14.4756

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 29,171 pcs available, New & Original

Parts Description: XTAL OSC SSXO 14.4756MHZ CMOS

Package: 4-SMD, No Lead

Data sheet: 25QHM572D0.25-1.pdf

Datasheets
QHM(43,53,572).pdf

RoHs Status: RoHS Compliant

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Unit Price: $7.17
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Specifications

25QHM572D0.25-14.4756 Tech Specifications
Mercury United Electronics, Inc. - 25QHM572D0.25-14.4756 technical specifications, attributes, parameters and parts with similar specifications to Mercury United Electronics, Inc. - 25QHM572D0.25-14.4756

Product Attribute	Attribute Value
Manufacturer	Mercury United Electronics
Voltage - Supply	2.5V
Type	SSXO
Spread Spectrum Bandwidth	-0.25%, Down Spread
Size / Dimension	0.276" L x 0.197" W (7.00mm x 5.00mm)
Series	QuikXO
Ratings	-
Package / Case	4-SMD, No Lead
Package	Strip

Product Attribute	Attribute Value
Output	CMOS (Low EMI)
Operating Temperature	-45°C ~ 85°C
Mounting Type	Surface Mount
Height - Seated (Max)	0.055" (1.40mm)
Function	Enable/Disable
Frequency Stability	±50ppm
Frequency	14.4756 MHz
Base Resonator	Crystal
Absolute Pull Range (APR)	-

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.60.0050

Frequently Asked Questions(FAQ)

How does the frequency stability of the 25QHM572D0.25-14.4756 compare to other SSXO oscillators in similar voltage and temperature ranges, and what implications does this have for clock synchronization in high-precision digital systems?: The 25QHM572D0.25-14.4756 offers a frequency stability of ±50ppm across its operating range of -45°C to 85°C, which is typical for low-cost, low-power surface-mount crystal oscillators. While not as tight as ±25ppm or better found in some precision TCXOs or OCXOs, this level of stability is generally sufficient for most embedded systems requiring reliable timing without excessive cost. In applications such as USB communication or serial protocols like UART at 14.4756 MHz, a ±50ppm deviation results in less than 724 Hz frequency shift, which is typically within tolerance for standard communication protocols. This makes it suitable for consumer electronics and industrial control systems where moderate timing accuracy suffices.

What design considerations should be made when integrating the 25QHM572D0.25-14.4756 into a PCB layout to minimize EMI and ensure reliable operation?: Given that the 25QHM572D0.25-14.4756 is designed with CMOS output and spread spectrum modulation (down-spread by 0.25%), careful PCB layout is essential to maintain signal integrity and reduce electromagnetic interference. The device’s compact 7.00mm x 5.00mm footprint allows placement close to the microcontroller or FPGA, minimizing trace length and parasitic inductance. To optimize performance, place decoupling capacitors—typically 100nF ceramic—as close as possible to the VDD pin, and avoid routing sensitive analog or high-speed digital traces beneath the oscillator. Ground plane proximity under the component helps stabilize reference potential and reduces radiation. Additionally, due to the down-spread nature of the spread spectrum feature, the 25QHM572D0.25-14.4756 effectively lowers peak emissions, aiding compliance with FCC Part 15 or CISPR standards in end products.

Can the enable/disable function of the 25QHM572D0.25-14.4756 be used to reduce power consumption during idle periods, and how does this affect startup time and system responsiveness?: Yes, the 25QHM572D0.25-14.4756 includes an active-low enable input that allows software-controlled shutdown of the oscillator, enabling significant power savings during low-activity phases. When disabled, supply current drops from approximately 15 mA (active) to under 1 µA (standby), making it ideal for battery-powered or energy-efficient designs. However, reactivation requires time for the internal circuitry to stabilize; typical wake-up latency is around 10 ms. For real-time applications where deterministic response is critical, this delay may necessitate alternative strategies such as using a backup timer or coordinating wake events. Designers must weigh the trade-off between power efficiency and responsiveness when implementing sleep modes.

How does the spread spectrum bandwidth specification (-0.25% down spread) of the 25QHM572D0.25-14.4756 impact harmonic emissions compared to non-modulated oscillators?: The -0.25% down spread feature of the 25QHM572D0.25-14.4756 modulates the carrier frequency by varying it sinusoidally within a narrow band centered below the nominal 14.4756 MHz. This technique disperses energy across a wider spectral width rather than concentrating it at discrete harmonics, thereby reducing peak emission levels at integer multiples of the fundamental frequency. In practice, this can lower conducted and radiated EMI by up to 10–15 dBμV/m in key harmonic bands, facilitating easier certification in environments with strict EMC requirements. However, this comes at the cost of slightly increased RMS jitter, which should be evaluated against the application’s timing budget. For digital systems using asynchronous interfaces, the net effect is often favorable despite minor timing uncertainty.

Is the 25QHM572D0.25-14.4756 suitable for use in automotive-grade temperature environments, and what modifications or testing might be required beyond standard industrial conditions?: No, the 25QHM572D0.25-14.4756 is rated for industrial temperatures only (-45°C to +85°C), whereas automotive applications typically require components qualified to AEC-Q200 and tested over -40°C to +125°C. Operating outside the specified range could result in degraded frequency stability, increased phase noise, or complete failure. While the base crystal material and packaging offer some robustness, the absence of automotive qualification means the part is not recommended for safety-critical automotive subsystems such as ADAS, engine control units, or infotainment systems requiring long-term reliability under thermal stress. Engineers targeting automotive markets should seek alternative devices explicitly marked as AEC-Q200 compliant.

What are the key differences between the 25QHM572D0.25-14.4756 and a standard SPXO (Simple Packaged Crystal Oscillator) when selecting a clock source for a USB-to-Serial bridge circuit?: The 25QHM572D0.25-14.4756 is a Spread Spectrum Crystal Oscillator (SSXO) with CMOS low-EMI output and enable/disable control, whereas a standard SPXO lacks both spread spectrum modulation and logic-level shutdown. In a USB-to-Serial bridge application requiring precise 14.4756 MHz timing—commonly used to generate baud rates compatible with USB Full Speed signaling—the 25QHM572D0.25-14.4756 provides superior EMI mitigation through down-spreading, which reduces interference with nearby RF components. Additionally, its enable function allows dynamic power management, unlike fixed-output SPXOs. However, if EMI compliance is not a concern and continuous operation is assumed, a simpler SPXO might suffice at lower cost. The choice hinges on balancing regulatory needs, power constraints, and system complexity.

How does the Moisture Sensitivity Level (MSL) rating of 1 for the 25QHM572D0.25-14.4756 affect handling procedures during reflow soldering, and why is this advantageous in high-volume manufacturing?: With an MSL rating of 1 (unlimited shelf life and no baking required before reflow), the 25QHM572D0.25-14.4756 can be stored indefinitely at ambient conditions and processed immediately after unpacking. This simplifies inventory management and eliminates the need for humidity-sensitive storage or pre-drying steps prior to assembly, reducing lead time and risk of moisture-related defects like popcorning. In high-volume SMT production lines, where throughput and consistency are paramount, this characteristic enhances process reliability and lowers operational overhead. Manufacturers can implement standard lead-free reflow profiles without additional precautions, streamlining compliance with IPC standards and improving overall yield.

What role does the 2.5V supply voltage play in determining compatibility with modern microcontrollers, and are there any risks associated with voltage mismatch when interfacing the 25QHM572D0.25-14.4756?: The 25QHM572D0.25-14.4756 operates at 2.5V, which aligns well with legacy 3.3V logic systems but introduces potential interface challenges with newer 1.8V or 1.2V MCUs. Since CMOS inputs typically require valid logic thresholds near half the supply voltage, connecting a 2.5V-driven oscillator directly to a 1.8V microcontroller may result in marginal noise margins, especially at the enable pin. While the absolute maximum input voltage exceeds 3.6V, prolonged exposure to voltages above the MCU’s VDD could damage I/O pins. Therefore, level shifting or voltage translation may be necessary. Conversely, when paired with 3.3V devices, the 2.5V output remains safely within acceptable input ranges, ensuring robust signal integrity. Careful attention to voltage domains is crucial during integration.

Parts with Similar Specifications

The three parts on the right have similar specifications to Mercury United Electronics, Inc. 25QHM572D0.25-14.4756

Product Attribute
Part Number	25QHM572D0.25-14.7456	25QHM572D0.25-14.74772	25QHM572D0.25-148.500	25QHM572D0.25-13.560
Manufacturer	Mercury United Electronics, Inc.	Mercury United Electronics, Inc.	Mercury United Electronics, Inc.	Mercury United Electronics, Inc.
Frequency	-	-	-	-
Height - Seated (Max)	-	-	-	-
Ratings	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Base Resonator	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Output	-	-	-	-
Absolute Pull Range (APR)	-	-	-	-
Type	-	-	-	-
Size / Dimension	-	-	-	-
Voltage - Supply	-	-	-	-
Frequency Stability	-	-	-	-
Spread Spectrum Bandwidth	-	-	-	-
Function	-	-	-	-
Series	-	-	-	-

25QHM572D0.25-14.4756 Datasheet PDF

Download 25QHM572D0.25-14.4756 pdf datasheets and Mercury United Electronics, Inc. documentation for 25QHM572D0.25-14.4756 - Mercury United Electronics, Inc..

Datasheets: QHM(43,53,572).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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In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

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Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
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