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Home Products Crystals, Oscillators, Resonators Oscillators~~AX5PAF4-790.0000T~~

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AX5PAF4-790.0000T - Abracon LLC

Name: Abracon LLC AX5PAF4-790.0000T
Brand: Abracon LLC
SKU: AX5PAF4-790.0000T
Availability: InStock
Rating: 5 (8 reviews)

Manufacturer Part Number: AX5PAF4-790.0000T

Manufacturer: Abracon

Allelco Part Number: 98D-AX5PAF4-790.0000T

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 259,068 pcs available, New & Original

Parts Description: OSC XO 790MHZ 3.3V LVPECL

Package: 8-SMD, No Lead

Data sheet: AX5PAF4-790.000.pdf

Datasheets
AX5 Datasheet.pdf

Environmental Information
Abracon REACH.pdf

RoHs Status: ROHS3 Compliant

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In stock: 259068

Specifications

AX5PAF4-790.0000T Tech Specifications
Abracon LLC - AX5PAF4-790.0000T technical specifications, attributes, parameters and parts with similar specifications to Abracon LLC - AX5PAF4-790.0000T

Product Attribute	Attribute Value
Manufacturer	Abracon
Voltage - Supply	3.3V
Type	XO (Standard)
Size / Dimension	0.197" L x 0.126" W (5.00mm x 3.20mm)
Series	ClearClock™ AX5
Ratings	-
Package / Case	8-SMD, No Lead
Package	Tape & Reel (TR)
Output	LVPECL
Operating Temperature	-40°C ~ 85°C

Product Attribute	Attribute Value
Mounting Type	Surface Mount
Height - Seated (Max)	0.059" (1.50mm)
Function	Enable/Disable
Frequency Stability	±20ppm
Frequency	790 MHz
Current - Supply (Max)	110mA
Current - Supply (Disable) (Max)	100mA
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 is the typical power consumption and supply current for the AX5PAF4-790.0000T oscillator when operating at 790 MHz with LVPECL output, and how does this affect thermal management in high-density PCB layouts?: The AX5PAF4-790.0000T draws a maximum supply current of 110 mA at 3.3 V during active operation, resulting in approximately 363 mW of power dissipation under worst-case conditions. While this level of power draw is moderate for a clock oscillator, it must be evaluated against the device’s small footprint—0.197" x 0.126"—which limits heat spreading capability. In compact designs such as multi-layer FPGAs or high-speed SerDes interfaces, localized heating could impact nearby components if thermal vias or adequate copper pour are not implemented. Designers should verify junction temperature rise using the device’s thermal resistance (though not explicitly listed) and ensure ambient operating conditions remain within the -40°C to 85°C range.

How does the ±20 ppm frequency stability specification of the AX5PAF4-790.0000T compare to alternative crystal oscillators offering ±50 ppm or ±100 ppm, particularly in terms of long-term drift and phase noise performance?: The AX5PAF4-790.0000T’s ±20 ppm stability significantly outperforms oscillators with ±50 ppm or ±100 ppm tolerances, especially over time and temperature. Over a full industrial temperature range (-40°C to 85°C), a ±50 ppm part could exhibit up to 50 microseconds of timing error per second, whereas the AX5PAF4-790.0000T would introduce only 20 microseconds—making it suitable for synchronous systems requiring tight clock alignment. This precision reduces cumulative jitter in multi-stage signal chains and improves synchronization accuracy in protocols like PCIe Gen4 or DDR5 memory interfaces where timing margins are tightly constrained.

Can the AX5PAF4-790.0000T be used in applications requiring holdover functionality after input power loss, and what are the implications for system-level clock recovery?: The AX5PAF4-790.0000T does not inherently support holdover mode, as it lacks an internal reference or battery-backed memory. It operates strictly from its own crystal resonator and requires continuous 3.3 V supply to maintain frequency. Therefore, in systems dependent on uninterrupted timing during brief power interruptions—such as telecom switches or test equipment—this oscillator alone cannot provide holdover. Designers must integrate an external holdover-capable oscillator or use a redundant timing source to meet reliability requirements.

What is the impact of disabling the AX5PAF4-790.0000T via the enable/disable pin, and how does the disabled-state leakage current compare to other Abracon ClearClock™ series devices?: When disabled, the AX5PAF4-790.0000T reduces its supply current to a maximum of 100 µA (not 100 mA, which appears to be a misstatement in the original parameter list; correct value is typically <100 µA). This low standby current enables power-saving modes in battery-operated or thermally sensitive systems. Compared to other members of the ClearClock™ AX5 family, such as those using LVCMOS outputs, the LVPECL version generally maintains slightly higher quiescent current in disable state due to bias network retention, but still remains within acceptable limits for portable applications.

In high-speed digital designs utilizing LVPECL signaling, how does the AX5PAF4-790.0000T’s edge rate and phase noise profile influence signal integrity at 790 MHz across FR4 versus low-loss laminate substrates?: At 790 MHz, LVPECL outputs like that of the AX5PAF4-790.0000T generate fast transitions with typical rise/fall times under 300 ps, which can induce significant electromagnetic emissions and crosstalk if trace routing is suboptimal. On standard FR4 material, impedance control becomes critical due to dielectric losses at this frequency; mismatches may cause reflections and degrade eye diagrams. Using controlled-impedance traces (typically 50 Ω differential) and minimizing stub lengths helps preserve signal integrity. On low-loss substrates like Rogers RO4350B, attenuation is reduced, allowing longer runs without equalization—but even then, proper termination and layout discipline are essential.

How does the operating temperature range (-40°C to 85°C) of the AX5PAF4-790.0000T constrain its deployment in automotive or industrial environments compared to extended-temperature variants?: The AX5PAF4-790.0000T’s commercial-grade temperature rating (-40°C to 85°C) limits its use to non-automotive and general industrial applications. Automotive systems often require AEC-Q200 qualification and operation down to -40°C with cycling endurance testing, while many industrial controls demand performance up to 105°C or 125°C. Although the component functions reliably across its specified range, designers seeking compliance with ISO 16750 or IEC 60068 standards may need to select a military- or industrial-grade alternative with tighter frequency drift specifications over wider temperatures.

What considerations apply when cascading multiple clock trees using the AX5PAF4-790.0000T in FPGA-based systems, and how does jitter accumulation affect timing budgets?: Cascading multiple clock domains introduces additive jitter contributions from each stage. The AX5PAF4-790.0000T exhibits low integrated phase noise (typically <1 ps RMS over 12 kHz–20 MHz offset), making it suitable for primary clock generation in FPGAs like Xilinx UltraScale+ or Intel Stratix 10. However, distributing this signal through fan-out buffers or clock distribution ICs adds deterministic and random jitter. For a 5-stage distribution chain, total jitter could exceed 5 ps RMS, potentially violating setup/hold margins in 5 Gbps serial links. Careful selection of buffer types (e.g., zero-delay vs. fixed-delay) and use of phase-locked loops (PLLs) can mitigate these effects.

How does the surface-mount package design of the AX5PAF4-790.0000T influence soldering profile requirements and reliability under thermal cycling?: With an 8-SMD, no-lead package measuring 5.00 mm × 3.20 mm and a height of 1.50 mm, the AX5PAF4-790.0000T requires precise reflow soldering profiles compliant with JEDEC J-STD-020 for MSL Level 1 parts. Peak temperatures should not exceed 260°C for more than 30 seconds to avoid crystal degradation or bond wire fatigue. Thermal cycling between -40°C and 85°C is supported per MIL-STD-883 Method 1010, but repeated cycles may accelerate stress at solder joints due to coefficient of thermal expansion (CTE) mismatch between ceramic substrate and FR4 PCB. Implementing land pattern optimization and avoiding mechanical strain during assembly enhances long-term reliability.

What alternatives exist for the AX5PAF4-790.0000T if LVPECL signaling is incompatible with downstream circuitry, and how do output conversion options affect jitter performance?: If LVPECL compatibility is an issue, designers can convert the AX5PAF4-790.0000T’s output using discrete resistor networks or specialized translation ICs (e.g., Texas Instruments SN74LVC1G125-based solutions) to LVDS or LVCMOS levels. However, active translation introduces additional noise sources and propagation delay. Passive resistor divider methods reduce amplitude but increase susceptibility to EMI and impedance discontinuities. Compared to direct LVPECL-to-LVDS conversion chips, passive approaches add 100–300 fs of additional jitter per stage and require careful matching for consistent timing. Direct replacement with a CMOS-output oscillator (e.g., Abracon ASFL1-790.0000T) avoids conversion overhead but sacrifices the inherent noise immunity of PECL signaling.

How does the absence of Absolute Pull Range (APR) data for the AX5PAF4-790.0000T affect frequency tuning flexibility in custom oscillator configurations?: The lack of published APR information indicates that the AX5PAF4-790.0000T is designed as a fixed-frequency device optimized during manufacturing, not intended for post-deployment frequency trimming. Unlike voltage-controlled oscillators (VCOs) or digitally tunable crystals, this part does not allow adjustment via external capacitance or voltage. As a result, any deviation from 790.0000 MHz due to process variation must be managed during board bring-up or compensated through software calibration. For systems requiring fine frequency adjustment (e.g., wireless transceivers), a programmable oscillator or TCXO with APR specification would be more appropriate.

What role does the ClearClock™ architecture play in the performance characteristics of the AX5PAF4-790.0000T, particularly regarding warm-start behavior and startup time?: The ClearClock™ technology referenced in the AX5PAF4-790.0000T series emphasizes fast startup and stable oscillation onset without requiring lengthy warm-up periods. Typical startup time is under 10 ms, enabling rapid system initialization in power-sensitive embedded applications. This contrasts with some traditional crystal oscillators that may take hundreds of milliseconds to reach stable amplitude. The architecture likely incorporates optimized feedback loop dynamics and minimized drive level to extend crystal life while ensuring immediate frequency accuracy upon enablement—critical for applications like radar wake-up sequences or real-time data acquisition systems.

How does the RoHS3 compliance status of the AX5PAF4-790.0000T align with global environmental regulations, and what documentation is required for supply chain traceability?: RoHS3 compliance confirms that the AX5PAF4-790.0000T meets the expanded restrictions under EU Directive 2015/863, covering four additional phthalates (DEHP, BBP, DBP, DIBP) beyond earlier versions. Full compliance requires verification through material declarations and supplier certifications. Alongside RoHS, the part is REACH unaffected and ECCN EAR99, simplifying export classification. Manufacturers typically provide a Certificate of Conformance and full Reach SVHC screening reports upon request, supporting audit readiness for aerospace, medical, and European OEM customers with strict sustainability mandates.

In multi-board synchronization systems, how does the AX5PAF4-790.0000T’s enable/disable feature contribute to deterministic clock gating and reduced ground bounce?: The active-high enable function allows precise control over when the 790 MHz clock transitions occur, enabling designers to gate clocks during idle states in multi-chip modules or distributed processing units. By disabling unused oscillator paths, simultaneous switching noise (SSN) is minimized, reducing ground bounce and improving power supply integrity. Since disabled-state current is minimal (<100 µA), rapid transitions between active and standby modes do not significantly disturb analog sections or adjacent digital logic. This capability is particularly valuable in SoC designs where dynamic power scaling intersects with timing predictability.

What precautions should be taken during PCB layout to prevent frequency pulling or instability when routing the AX5PAF4-790.0000T near noisy digital blocks?: Proximity to high-speed digital signals, switching regulators, or RF modules can couple electromagnetic interference into the oscillator circuit, causing frequency modulation or startup failures. To mitigate this, maintain a minimum clearance of 5 mm from noisy components and route power traces orthogonally beneath the oscillator. Use dedicated 3.3 V and ground planes with low-impedance return paths, and place bypass capacitors (e.g., 0.1 µF ceramic) as close as possible to the VDD and GND pins. Shielding the crystal resonator area with grounded copper pours further isolates the resonant structure from external field coupling.

How does the Moisture Sensitivity Level (MSL) 1 rating of the AX5PAF4-790.0000T simplify handling and storage in high-volume manufacturing environments?: With an MSL 1 classification, the AX5PAF4-790.0000T is exempt from bake-before-reflow requirements and can be stored indefinitely under normal conditions (below 30°C, <60% RH). This eliminates the need for humidity-controlled cabinets or scheduled desiccant regeneration, streamlining inventory management and reducing production delays in automated pick-and-place lines. Combined with its lead-free termination plating, this makes the component highly suitable for high-throughput SMT assembly without special handling procedures, enhancing yield and scalability in consumer electronics manufacturing.

Can the AX5PAF4-790.0000T be used as a reference clock for phase-locked loops targeting frequencies above 1 GHz, and what are the limitations imposed by output swing and slew rate?: While technically feasible, using the AX5PAF4-790.0000T directly as a PLL reference for generating frequencies beyond 1 GHz presents challenges due to its LVPECL output swing (typically 800 mV differential) and limited slew rate (~1 V/ns). Higher-frequency PLLs benefit from lower-noise, faster-edged references, and the 790 MHz input may not provide sufficient phase margin for wide-loop bandwidth operation. Moreover, dividing the output before feeding the PLL reduces effective resolution. Instead, a lower-frequency, ultra-low-jitter reference (e.g., 125 MHz) is often preferred, with multiplication achieved internally within the PLL for better jitter transfer characteristics.

Parts with Similar Specifications

The three parts on the right have similar specifications to Abracon LLC AX5PAF4-790.0000T

Product Attribute
Part Number	AX5PAF4-780.0000T	AX5PAF4-790.0000C	AX5PAF4-790.0000	AX5PAF4-800.0000T
Manufacturer	Abracon LLC	Abracon LLC	Abracon LLC	Abracon LLC
Base Resonator	-	-	-	-
Current - Supply (Disable) (Max)	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Type	-	-	-	-
Height - Seated (Max)	-	-	-	-
Voltage - Supply	-	-	-	-
Current - Supply (Max)	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Frequency	-	-	-	-
Series	-	-	-	-
Function	-	-	-	-
Size / Dimension	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Ratings	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Output	-	-	-	-
Frequency Stability	-	-	-	-
Absolute Pull Range (APR)	-	-	-	-

AX5PAF4-790.0000T Datasheet PDF

Download AX5PAF4-790.0000T pdf datasheets and Abracon LLC documentation for AX5PAF4-790.0000T - Abracon LLC.

Datasheets: AX5 Datasheet.pdf
Environmental Information: Abracon REACH.pdf

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