Please refer to the English Version as our Official Version.

Europe: France~~(Français)~~ Germany~~(Deutsch)~~ Italy~~(Italia)~~ Russian~~(русский)~~ Poland~~(polski)~~ Czech~~(Čeština)~~ Luxembourg~~(Lëtzebuergesch)~~ Netherlands~~(Nederland)~~ Iceland~~(íslenska)~~ Hungarian~~(Magyarország)~~ Spain~~(español)~~ Portugal~~(Português)~~ Turkey~~(Türk dili)~~ Bulgaria~~(Български език)~~ Ukraine~~(Україна)~~ Greece~~(Ελλάδα)~~ Israel~~(עִבְרִית)~~ Sweden~~(Svenska)~~ Finland~~(Svenska)~~ Finland~~(Suomi)~~ Romania~~(românesc)~~ Moldova~~(românesc)~~ Slovakia~~(Slovenská)~~ Denmark~~(Dansk)~~ Slovenia~~(Slovenija)~~ Slovenia~~(Hrvatska)~~ Croatia~~(Hrvatska)~~ Serbia~~(Hrvatska)~~ Montenegro~~(Hrvatska)~~ Bosnia and Herzegovina~~(Hrvatska)~~ Lithuania~~(lietuvių)~~ Spain~~(Português)~~ Switzerland~~(Deutsch)~~ United Kingdom~~(English)~~

Asia/Pacific: Japan~~(日本語)~~ Korea~~(한국의)~~ Thailand~~(ภาษาไทย)~~ Malaysia~~(Melayu)~~ Singapore~~(Melayu)~~ Vietnam~~(Tiếng Việt)~~ Philippines~~(Pilipino)~~

Africa, India and Middle East: United Arab Emirates~~(العربية)~~ Iran~~(فارسی)~~ Tajikistan~~(فارسی)~~ India~~(हिंदी)~~ Madagascar~~(malaɡasʲ)~~

South America / Oceania: New Zealand~~(Maori)~~ Brazil~~(Português)~~ Angola~~(Português)~~ Mozambique~~(Português)~~

North America: United States~~(English)~~ Canada~~(English)~~ Haiti~~(Ayiti)~~ Mexico~~(español)~~

Home Products Crystals, Oscillators, Resonators Oscillators~~AX7DCF2-640.0000C~~

Image may be representation.
See specifications for product details.

~~Favorite~~

EXPRESS OPTION

Payment method

AX7DCF2-640.0000C - Abracon LLC

Name: Abracon LLC AX7DCF2-640.0000C
Brand: Abracon LLC
SKU: AX7DCF2-640.0000C
Availability: InStock
Rating: 5 (4 reviews)

Manufacturer Part Number: AX7DCF2-640.0000C

Manufacturer: Abracon

Allelco Part Number: 98D-AX7DCF2-640.0000C

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 296,050 pcs available, New & Original

Parts Description: XTAL OSC XO 640.0000MHZ LVDS SMD

Package: 8-SMD, No Lead

Data sheet: AX7DCF2-640.000.pdf

PCN Part Status Change
AX7 Series 15/Apr/2019.pdf

Environmental Information
Abracon REACH.pdf

RoHs Status: ROHS3 Compliant

~~Compare~~

Our certification

In stock: 296050

Specifications

AX7DCF2-640.0000C Tech Specifications
Abracon LLC - AX7DCF2-640.0000C technical specifications, attributes, parameters and parts with similar specifications to Abracon LLC - AX7DCF2-640.0000C

Product Attribute	Attribute Value
Manufacturer	Abracon
Voltage - Supply	1.8V
Type	XO (Standard)
Size / Dimension	0.276" L x 0.197" W (7.00mm x 5.00mm)
Series	ClearClock™ AX7
Ratings	-
Package / Case	8-SMD, No Lead
Package	Strip
Output	LVDS
Operating Temperature	-40°C ~ 85°C

Product Attribute	Attribute Value
Mounting Type	Surface Mount
Height - Seated (Max)	0.075" (1.90mm)
Function	Enable/Disable
Frequency Stability	±25ppm
Frequency	640 MHz
Current - Supply (Max)	70mA
Current - Supply (Disable) (Max)	65mA
Base Resonator	Crystal
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)

What are the key performance trade-offs when selecting the AX7DCF2-640.0000C LVDS oscillator for a high-speed digital design operating at 640 MHz?: The AX7DCF2-640.0000C offers exceptional frequency precision with ±25ppm stability across its -40°C to 85°C range, making it suitable for synchronous systems requiring tight timing margins. However, this level of stability comes with a maximum supply current draw of 70mA under active operation and up to 65mA when disabled, which may necessitate careful power budgeting in battery-powered or thermally constrained applications. Its 1.8V supply requirement aligns with modern low-voltage logic families but may require level translation when interfacing with legacy 3.3V systems.

How does the AX7DCF2-640.0000C compare to alternative LVDS oscillators in terms of jitter characteristics and phase noise for PCIe Gen4 or similar high-speed serial implementations?: While the datasheet does not specify absolute jitter values, the ClearClock™ architecture and crystal-based resonator typically provide superior phase noise performance compared to ceramic-resonator alternatives. For PCIe Gen4 applications requiring <100fs RMS jitter, the AX7DCF2-640.0000C’s clean LVDS output and low supply noise sensitivity make it competitive with other 640MHz devices from Abracon or Silicon Labs, though direct comparison requires measured data from both components under identical test conditions.

Can the AX7DCF2-640.0000C be used in a redundant clocking topology where two oscillators operate in parallel, and what precautions should be taken during enable/disable transitions?: Yes, the AX7DCF2-640.0000C supports redundant clock architectures due to its explicit enable/disable pin functionality. However, simultaneous activation must be avoided to prevent shoot-through currents. A recommended practice is to stagger the enable signals by several nanoseconds using dedicated control logic, ensuring only one device drives the bus at any time. This minimizes transient loading on the supply rails and prevents potential latch-up events during switching.

What layout considerations are critical when placing the AX7DCF2-640.0000C near a memory interface such as DDR5 to minimize EMI and maintain signal integrity?: The AX7DCF2-640.0000C’s compact 7.00mm × 5.00mm footprint allows proximity to high-speed traces, but its LVDS outputs demand controlled impedance routing—typically 100Ω differential pairs—with length matching within ±5 mils relative to other clocks. Grounding beneath the package via multiple stitching vias is essential to suppress ground bounce, and decoupling capacitors (ideally 100nF + 10µF) must be placed within 2mm of the VDD pins to handle the 70mA peak current demand during startup transients.

Is it feasible to use the AX7DCF2-640.0000C in an environment exceeding 85°C, and what derating guidelines apply if operating near the upper temperature limit?: The AX7DCF2-640.0000C is rated only to 85°C ambient temperature; operation beyond this threshold risks frequency drift, degraded stability, or premature failure. If application constraints require higher temperatures, consider derating the load capacitance slightly above nominal values to compensate for crystal motional parameter shifts, and monitor long-term aging effects more closely due to accelerated thermal stress.

How does the MSL rating of 1 affect handling procedures for the AX7DCF2-640.0000C during mass production assembly?: With an Moisture Sensitivity Level of 1, the AX7DCF2-640.0000C can be stored indefinitely without baking prior to reflow soldering, simplifying inventory management. However, standard JEDEC J-STD-033 practices still apply: ensure packaging remains intact until use, and avoid exposure to humid environments (>60% RH) for extended periods before processing to prevent popcorning during thermal cycles.

In a system requiring multiple synchronized clocks, how does the AX7DCF2-640.0000C integrate with FPGA clock management resources like MMCM or PLL blocks?: The AX7DCF2-640.0000C’s LVDS input/output compatibility with most FPGA global clock networks simplifies integration. When used as a reference clock, its 1.8V swing levels are well within typical LVCMOS thresholds, but verify receiver termination settings in the FPGA configuration. Clock dividers within the FPGA can then generate sub-harmonics for DDR controllers while maintaining phase alignment across channels.

What are the implications of using the AX7DCF2-640.0000C in a multi-drop LVDS bus versus point-to-point topology?: The AX7DCF2-640.0000C is designed for point-to-point LVDS links. Connecting multiple loads in parallel increases capacitive loading on its output driver, potentially violating setup/hold times and causing signal distortion at 640MHz. Always terminate each LVDS pair with a 100Ω resistor near the receiving end, and avoid sharing the same oscillator output among more than two high-speed receivers unless buffered externally.

Does the AX7DCF2-640.0000C support spread spectrum clocking (SSC), and how would that impact EMC compliance in industrial applications?: The AX7DCF2-640.0000C does not feature built-in spread spectrum modulation. Implementing SSC requires external circuitry to vary the oscillator frequency within a defined range, which introduces complexity and may degrade phase noise performance. For EMI-sensitive designs, consider using the AX7DCF2-640.0000C without SSC and instead rely on PCB-level techniques like optimized trace routing and shielding, as modulating a fixed-frequency crystal oscillator often proves impractical at 640MHz.

What is the expected long-term frequency drift (aging) behavior of the AX7DCF2-640.0000C, and how should it be compensated in mission-critical systems?: Crystal-based oscillators like the AX7DCF2-640.0000C typically exhibit aging of ±3ppm over the first year, decreasing to ±1ppm thereafter under stable conditions. Over five years, cumulative drift could reach ±5ppm—comparable to its initial ±25ppm stability spec. Systems requiring tighter long-term accuracy should implement periodic calibration routines or select models with lower aging specifications, though no specific aging curve is provided in the current documentation.

How does the supply voltage tolerance of the AX7DCF2-640.0000C compare to similar LVDS oscillators when power sequencing is non-ideal?: The AX7DCF2-640.0000C operates from a nominal 1.8V supply, but exact tolerance isn’t stated. Industry-standard LVDS oscillators typically allow ±5% deviation (±0.09V). Assuming similar behavior, brief undervoltage events below 1.71V may cause instability or reset, while overvoltage could stress internal regulators. Designers should include soft-start circuits or bulk capacitance to dampen power-on surges, especially since the disable state draws 65mA—indicating significant quiescent current even when inactive.

Are there known reliability issues or failure modes associated with the AX7DCF2-640.0000C in high-vibration environments common in automotive applications?: As a surface-mount device with a crystal resonator, the AX7DCF2-640.0000C benefits from robust solder joints but remains susceptible to mechanical stress-induced frequency shifts. In high-vibration settings, ensure adequate PCB rigidity around the oscillator location and avoid placement near mounting holes or flexible connectors. No specific automotive qualification is listed (e.g., AEC-Q200), so environmental validation testing is recommended for safety-critical uses.

What alternatives exist if the AX7DCF2-640.0000C’s 1.8V supply cannot be accommodated in a legacy 3.3V-only design?: Alternatives include using a 3.3V LVDS-compatible oscillator such as the AX7DCF3-640.0000T (if available), which maintains 640MHz output with higher supply tolerance. Alternatively, employ an LVDS-to-HCSL translator IC before connecting to 3.3V endpoints, though this adds board area and skew. Direct substitution without voltage adjustment risks damaging the AX7DCF2-640.0000C due to overvoltage exposure.

How does the height profile of the AX7DCF2-640.0000C influence selection for ultra-thin form-factor devices?: At 1.90mm seated height, the AX7DCF2-640.0000C is relatively tall for portable electronics. In space-constrained designs (e.g., wearables or modular cards), compare against lower-profile options like 1.0mm-height MEMS oscillators, though these may lack equivalent phase noise performance. Trade-offs between size, frequency accuracy, and power consumption must be evaluated based on system requirements.

What documentation or characterization data should be requested from Abracon for the AX7DCF2-640.0000C when qualifying it for a new product line?: Request application notes covering thermal derating curves, phase noise plots, and aging projections. Additionally, ask for reliability reports including HTOL (High Temperature Operating Life) results and vibration test summaries. For timing-sensitive applications, obtain jitter transfer function measurements and power supply rejection ratio (PSRR) data to validate robustness under real-world noise conditions.

Parts with Similar Specifications

The three parts on the right have similar specifications to Abracon LLC AX7DCF2-640.0000C

Product Attribute
Part Number	AX7DCF2-640.0000T	AX7DCF2-640.0000	AX7DCF2-620.0000C	AX7DCF2-650.0000C
Manufacturer	Abracon LLC	Abracon LLC	Abracon LLC	Abracon LLC
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Type	-	-	-	-
Frequency	-	-	-	-
Current - Supply (Max)	-	-	-	-
Absolute Pull Range (APR)	-	-	-	-
Series	-	-	-	-
Frequency Stability	-	-	-	-
Voltage - Supply	-	-	-	-
Base Resonator	-	-	-	-
Ratings	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Current - Supply (Disable) (Max)	-	-	-	-
Output	-	-	-	-
Size / Dimension	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Height - Seated (Max)	-	-	-	-
Function	-	-	-	-

AX7DCF2-640.0000C Datasheet PDF

Download AX7DCF2-640.0000C pdf datasheets and Abracon LLC documentation for AX7DCF2-640.0000C - Abracon LLC.

PCN Part Status Change: AX7 Series 15/Apr/2019.pdf
Environmental Information: Abracon REACH.pdf

Customers Also Interested in

Recommended Products

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.

Write a Review

Your Email address will not be published.

Shipment

Delivery Time

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.

Delivery Cost

Use your express account for shipment if you have one.
Use our account for the shipment. Refer to the table below for the approximate charges.

(Different time frame / countries / package size has different price.)

Delivery Method

Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
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.
Contact us if you have any questions.

QC (Quality Warranty)
Payment Support
Packaging
Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.

Strict quality inspection builds a solid foundation for electronic component quality.

Visual inspection
Performance testing and reliability verification
Standardized full-process testing
Precise control of every parameter

We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.

Quality Inspection

Payment Support

The payment method can be chosen from the methods shown below: Wire Transfer (T/T, Bank Transfer), Western Union, Credit card, PayPal.

Stable Delivery, Sincere Partnership — Your Faithful Supply Chain Partner

Efficient Supply Management
Cost-Saving Procurement
Fast Sourcing & Delivery

Contact us if you have any questions.

Phone: +00852 9146 4856
Email: info@allelco.com

Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.

ESD

Certifications & Memberships

Third-party certified, strict quality control. Our certification

ISO 9001: 2015
ISO 13485: 2016
ISO 14001: 2015
ISO 28000: 2007
ISO 45001: 2018
GB/T 27922-2011

SMTA
IPC
ESD
PSMA