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HomeProductsCrystals, Oscillators, ResonatorsOscillatorsABDFVCTCXO-38.400MHZ-E-2-T5
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ABDFVCTCXO-38.400MHZ-E-2-T5 - Abracon LLC

Manufacturer Part Number
ABDFVCTCXO-38.400MHZ-E-2-T5
Manufacturer
Abracon
Allelco Part Number
98D-ABDFVCTCXO-38.400MHZ-E-2-T5
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
674,381 pcs available, New & Original
Parts Description
XTAL OSC VCTCXO 38.4000MHZ LVCMO
Package
14-SMD, No Lead
Data sheet
ABDFVCTCXO-38.4.pdf

PCN Obsolescence/ EOL

Multiple Devices 10/Nov/2020.pdf

3D Drawings

ABDF(VC)TCXO.pdf.pdf

Environmental Information

Abracon REACH.pdf
RoHs Status
ROHS3 Compliant
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In stock: 674381

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Specifications

ABDFVCTCXO-38.400MHZ-E-2-T5 Tech Specifications
Abracon LLC - ABDFVCTCXO-38.400MHZ-E-2-T5 technical specifications, attributes, parameters and parts with similar specifications to Abracon LLC - ABDFVCTCXO-38.400MHZ-E-2-T5

Product Attribute Attribute Value
Manufacturer Abracon
Voltage - Supply 3.3V
Type VCTCXO
Size / Dimension 0.559" L x 0.360" W (14.20mm x 9.15mm)
Series ABDFVCTCXO
Ratings -
Package / Case 14-SMD, No Lead
Package Tape & Reel (TR)
Output LVCMOS
Operating Temperature -20°C ~ 70°C
Product Attribute Attribute Value
Mounting Type Surface Mount
Height - Seated (Max) 0.122" (3.10mm)
Function -
Frequency Stability ±280ppb
Frequency 38.4 MHz
Current - Supply (Max) 20mA
Current - Supply (Disable) (Max) -
Base Resonator Crystal
Absolute Pull Range (APR) -

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

How does the ABDFVCTCXO-38.400MHz-E-2-T5 compare to standard crystal oscillators in terms of frequency stability for precision timing applications?
The ABDFVCTCXO-38.400MHz-E-2-T5 offers a frequency stability of ±280ppb, which is significantly tighter than typical oven-controlled or standard crystal oscillators that often range from ±2ppm to ±5ppm. This level of stability makes it suitable for applications requiring minimal frequency drift over time and temperature, such as industrial instrumentation or communication systems where precise clocking is critical. In contrast, standard oscillators exhibit much higher instability due to environmental sensitivity, making the TCXO variant preferable when long-term accuracy outweighs power or cost constraints.
What are the key design considerations when integrating the ABDFVCTCXO-38.400MHz-E-2-T5 into a 3.3V digital system with limited current budget?
The ABDFVCTCXO-38.400MHz-E-2-T5 operates at 3.3V and draws 20mA under normal conditions, which must be factored into power-sensitive designs. While this current consumption is moderate for a TCXO, engineers should verify that the system’s power rail can sustain this load without voltage droop, especially during startup transients. Additionally, layout parasitics and trace inductance near the oscillator pins can affect performance, so a short, low-impedance path to ground and proper decoupling (e.g., 100nF ceramic capacitor close to VDD) are essential. Given its SMD1409-5P footprint, thermal management within compact PCB real estate must also be considered to avoid localized heating affecting stability.
Can the ABDFVCTCXO-38.400MHz-E-2-T5 be used in outdoor or industrial environments outside its specified operating temperature range?
No, the ABDFVCTCXO-38.400MHz-E-2-T5 is rated for operation between -20°C and +70°C. Exceeding this range risks degraded frequency stability, increased phase noise, or even functional failure. For extended ambient temperatures beyond these bounds, additional thermal shielding, heatsinking, or environmental enclosures would be required—but even then, the device’s internal compensation circuitry may not adequately correct for extreme thermal gradients. Therefore, it is not recommended for direct deployment in harsh climates without rigorous environmental testing and derating analysis.
How does the LVCMOS output type of the ABDFVCTCXO-38.400MHz-E-2-T5 impact signal integrity in long trace routing scenarios?
The LVCMOS output of the ABDFVCTCXO-38.400MHz-E-2-T5 drives standard 3.3V logic levels, but at 38.4MHz, transmission line effects become relevant over traces longer than λ/10 (~2 inches at this frequency). Without impedance control, reflections can distort rise times and increase jitter. To maintain signal integrity, termination resistors (e.g., 50Ω series resistor at the source) and controlled-impedance routing should be implemented. Compared to differential outputs like LVDS, LVCMOS is more susceptible to EMI and ringing, necessitating careful layout discipline in high-speed digital systems.
Is the ABDFVCTCXO-38.400MHz-E-2-T5 compatible with automated pick-and-place assembly processes commonly used in high-volume manufacturing?
Yes, the ABDFVCTCXO-38.400MHz-E-2-T5 is packaged in tape and reel (TR), making it fully compatible with industry-standard pick-and-place equipment. The SMD1409-5P footprint ensures reliable placement accuracy, and the component’s small form factor supports dense PCB layouts. However, during reflow profiling, attention must be paid to peak temperature and soak phases to prevent damage to the oscillator circuitry, as excessive thermal exposure can compromise calibration or mechanical integrity. Most manufacturers publish recommended profiles for similar TCXOs, which should be followed closely.
What distinguishes the ABDFVCTCXO-38.400MHz-E-2-T5 from other TCXOs in ABRACON’s portfolio with respect to aging performance?
While specific aging data isn't provided in the available parameters, the ABDFVCTCXO-38.400MHz-E-2-T5 benefits from ABRACON’s standard TCXO process, typically resulting in annual aging rates around ±1ppm over five years for comparable models. This implies long-term frequency drift well within many precision applications—unlike uncompensated crystals, which may age significantly faster. However, without explicit test data from the manufacturer, system designers should assume conservative aging margins (e.g., ±3ppm total) when calculating holdover requirements in mission-critical timing loops.
How does the ±280ppb stability specification of the ABDFVCTCXO-38.400MHz-E-2-T5 translate into actual timing error over a 24-hour period?
Over 24 hours, a frequency deviation of ±280ppb equates to approximately ±24 milliseconds of accumulated time error at 38.4MHz. This means the clock could drift by up to 12 milliseconds in either direction if stability were at the worst-case tolerance. While this may seem small, in synchronization protocols like IEEE 1588 or GPS-disciplined clocks, such errors can exceed acceptable thresholds. Thus, while superior to most non-temperature-compensated oscillators, this level of stability may still require periodic external discipline for ultra-high-precision applications.
Should decoupling capacitors be placed directly on the VDD pin of the ABDFVCTCXO-38.400MHz-E-2-T5, and what value is typically effective?
Yes, a 100nF ceramic capacitor should be connected between the VDD and GND pins of the ABDFVCTCXO-38.400MHz-E-2-T5 as close to the package as possible—ideally within 3mm. This minimizes supply noise coupling into the oscillator loop, which could degrade stability or increase phase noise. A parallel 10μF bulk capacitor might also be used at the board-level supply entry point to handle transient loads, but the local bypass is critical for maintaining clean power delivery to the sensitive analog front end of the TCXO.
In what scenarios would choosing the ABDFVCTCXO-38.400MHz-E-2-T5 offer diminishing returns compared to lower-cost alternatives?
The ABDFVCTCXO-38.400MHz-E-2-T5 delivers high stability but comes at a premium over basic crystal oscillators or even uncorrected TCXOs with looser specs. In applications where frequency accuracy is secondary—such as consumer audio, general-purpose microcontrollers without tight timing requirements, or prototyping environments—the added cost and power draw (20mA) may not justify the benefit. Furthermore, if the system already employs an external temperature sensor and software-based compensation algorithm, a simpler oscillator might suffice, reducing BOM cost and complexity.
How does the SMD1409-5P package of the ABDFVCTCXO-38.400MHz-E-2-T5 influence mechanical stress sensitivity during PCB handling and thermal cycling?
The SMD1409-5P package provides robust solder joint reliability under normal conditions, but its small size increases susceptibility to microcracking from repeated thermal expansion mismatches between the PCB and component during temperature cycling outside the -20°C to +70°C range. During manual assembly or rework, excessive mechanical stress near the leads can also compromise internal crystal mounts. Designers should avoid placing the ABDFVCTCXO-38.400MHz-E-2-T5 near high-stress areas (e.g., edges, mounting holes) and ensure adequate pad reinforcement if subjected to vibration or shock environments.
Can the ABDFVCTCXO-38.400MHz-E-2-T5 be used as a replacement for a fundamental-mode crystal in a Pierce oscillator configuration?
No, the ABDFVCTCXO-38.400MHz-E-2-T5 is an active oscillator module with built-in feedback and compensation circuitry, not a passive resonator. It cannot function as a drop-in replacement for a bare crystal in a Pierce oscillator circuit. Attempting to do so would result in incorrect biasing, potential damage due to overdrive, or complete failure to oscillate. Instead, it must be driven directly by its designated supply and output pins according to its datasheet recommendations.
What role does the "E" marking in the ABDFVCTCXO-38.400MHz-E-2-T5 model number likely indicate, and how might it affect interchangeability?
The "E" in ABDFVCTCXO-38.400MHz-E-2-T5 typically denotes a specific engineering revision or variant within ABRACON’s product family, possibly related to calibration settings, packaging orientation, or minor electrical adjustments. While core parameters like frequency and stability remain consistent across revisions, substituting one "E"-variant for another without verification could lead to mismatched start-up behavior or compatibility issues in automated test fixtures. Engineers should consult the latest datasheet or contact the manufacturer to confirm interchangeability before substituting components in production lines.
How does the 38.4MHz output frequency of the ABDFVCTCXO-38.400MHz-E-2-T5 align with common digital communication standards?
The 38.4MHz frequency is strategically chosen for compatibility with certain Ethernet PHY devices and some industrial serial interfaces that divide this frequency down to standard baud rates. For example, dividing 38.4MHz by 128 yields 300kHz, useful for RS-485 or Modbus implementations. Its use in automotive or networking subsystems makes it advantageous where standardized clock trees reduce design effort. However, unlike multiples of 25MHz or 125MHz common in Gigabit Ethernet, 38.4MHz may require careful PLL configuration to generate higher data rates.
Are there any known limitations regarding startup time or warm-up behavior of the ABDFVCTCXO-38.400MHz-E-2-T5 after power application?
While not explicitly stated in the provided parameters, most TCXOs of this class exhibit startup times typically ranging from 2ms to 10ms under nominal conditions. The ABDFVCTCXO-38.400MHz-E-2-T5 likely falls within this range, but prolonged warm-up periods can occur if the device is operated near the extremes of its temperature rating or if supply ramp rates are too slow. System designers should allow sufficient stabilization time before relying on the output for time-sensitive operations, particularly in battery-powered or low-latency applications.
How does the LVCMOS output drive strength of the ABDFVCTCXO-38.400MHz-E-2-T5 compare to CMOS buffers from other vendors at similar frequencies?
The ABDFVCTCXO-38.400MHz-E-2-T5 features standard LVCMOS output drivers capable of driving multiple loads up to a few hundred picofarads without degradation. At 38.4MHz, this corresponds to supporting several logic inputs or short traces reliably. Compared to higher-drive CMOS buffers from TI or ON Semiconductor, its capability is modest but sufficient for typical digital interconnects. If driving long cables or capacitive loads exceeding 1–2nF, external buffering or series termination would be advisable to preserve waveform fidelity.
What precautions should be taken during storage or handling of unused ABDFVCTCXO-38.400MHz-E-2-T5 units prior to PCB installation?
Unused ABDFVCTCXO-38.400MHz-E-2-T5 units should be stored in anti-static packaging at room temperature and humidity below 60% RH to prevent condensation-induced corrosion or lead oxidation. Exposure to high static voltages during unpacking can damage sensitive internal circuitry, so ESD-safe workstations and grounded tools are mandatory. Avoid prolonged storage in environments with strong electromagnetic fields or rapid temperature swings, as these can alter pre-calibration settings or stress solder joints prematurely.
Does the ABDFVCTCXO-38.400MHz-E-2-T5 support frequency trimming or external adjustment capabilities?
No, the ABDFVCTCXO-38.400MHz-E-2-T5 is factory-trimmed and does not provide external frequency adjustment mechanisms such as varactors or trim pots. Any tuning must be achieved through hardware selection of part numbers with different frequency variants (e.g., 38.400MHz vs. 38.400000MHz). This simplifies system integration but reduces flexibility during calibration. For applications requiring post-deployment fine-tuning, alternative architectures using digitally tunable oscillators should be considered instead.
How does the RoHS compliance status of the ABDFVCTCXO-38.400MHz-E-2-T5 impact global market distribution and regulatory adherence?
The ABDFVCTCXO-38.400MHz-E-2-T5 meets RoHS standards, meaning it contains no lead, mercury, cadmium, or other restricted substances above mandated thresholds. This enables unrestricted distribution in EU, North American, and most Asian markets without additional certification burdens. However, designers should still verify conformance documentation for each batch, as non-compliant substitutions or older inventory may occasionally slip into supply chains, risking customs rejection or liability in regulated industries like medical or automotive.

Parts with Similar Specifications

The three parts on the right have similar specifications to Abracon LLC ABDFVCTCXO-38.400MHZ-E-2-T5

Product Attribute ABDFVCTCXO-38.400MHZ-L-2-T5 ABDFVCTCXO-38.400MHZ-E-2-T2 ABDFVCTCXO-38.400MHZ-E-2-CT ABDFVCTCXO-38.400MHZ-L-2-CT
Part Number ABDFVCTCXO-38.400MHZ-L-2-T5 ABDFVCTCXO-38.400MHZ-E-2-T2 ABDFVCTCXO-38.400MHZ-E-2-CT ABDFVCTCXO-38.400MHZ-L-2-CT
Manufacturer Abracon LLC Abracon LLC Abracon LLC Abracon LLC
Frequency - - - -
Function - - - -
Series - - - -
Height - Seated (Max) - - - -
Type - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Absolute Pull Range (APR) - - - -
Base Resonator - - - -
Current - Supply (Max) - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Output - - - -
Current - Supply (Disable) (Max) - - - -
Voltage - Supply - - - -
Frequency Stability - - - -
Ratings - - - -
Size / Dimension - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad

ABDFVCTCXO-38.400MHZ-E-2-T5 Datasheet PDF

Download ABDFVCTCXO-38.400MHZ-E-2-T5 pdf datasheets and Abracon LLC documentation for ABDFVCTCXO-38.400MHZ-E-2-T5 - Abracon LLC.

Datasheets
ABDF(VC)TCXO Package Drawing.pdf ABDF(VC)TCXO Series Datasheet.pdf
HTML Datasheet
ABDF(VC)TCXO Series Datasheet.pdf
PCN Obsolescence/ EOL
Multiple Devices 10/Nov/2020.pdf
3D Drawings
ABDF(VC)TCXO.pdf.pdf
Environmental Information
Abracon REACH.pdf

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Abracon LLC

ABDFVCTCXO-38.400MHZ-E-2-T5

Abracon LLC
98D-ABDFVCTCXO-38.400MHZ-E-2-T5

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