VCXO Oscillators (Voltage-Controlled Crystal Oscillators) are critical components in modern electronics, providing stable and adjustable frequency references for applications ranging from telecommunications and data networking to precision timing and frequency synthesis. These devices allow for fine-tuning of frequency through an applied voltage, essential for phase-locked loops and clock synchronization. Products were evaluated based on frequency range, output logic, package type, operating conditions, user reviews, and feature analysis.
SN74LS625N Oscillators VCXO Dual Voltage-Controlled oscillators 16-PDIP 0 to 70
$1.99
This dual VCXO offers versatility with two independent voltage-controlled oscillators in a widely compatible PDIP package, suitable for various general-purpose applications.
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(1Pcs) ASVV-78.6432MHZ-L50-N102-T VCXO Oscillators XTAL VCXO 78.6432MHZ CMOS
$17.69
The Generic ASVV-78.6432MHZ-L50-N102-T provides a standard, specific frequency CMOS output, making it a straightforward and cost-effective solution for fixed-frequency requirements.
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AVLIS-CO YNETHE125 Controlled Oscillator 125MHz VCXO CMOS 6-Pin SMD, RoHS, Cut Tape
$4.99
The AVLIS-CO YNETHE125 offers a high 125MHz frequency in a compact 6-Pin SMD package, ideal for space-constrained, high-performance designs requiring a modern form factor.
View on AmazonLooking for the best VCXO Oscillators?
Discover now our comparison of the best VCXO Oscillators. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best VCXO Oscillators are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the VCXO Oscillators in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.
- ASVV-78.6432MHZ-L50-N102-T VCXO Oscillators XTAL OSC VCXO 78.6432MHZ CMOS (1Pcs)
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- Resonators
- (5pcs) 25.000MHZ 25MHZ 25M VCXO Active Voltage Controlled Crystal Oscillator SMD 5070 5.0*7.0MM 6PIN Chip 25.000M
- Resonators
- (5pcs) 25.000MHZ 25MHZ 25M VCXO Active Voltage Controlled Crystal Oscillator SMD 5070 5.0*7.0MM 6PIN Chip 25.000M
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How to Choose the Best VCXO Oscillators
Frequency Range and Output Logic
When selecting a VCXO, the operational frequency and output logic are paramount. Different applications demand varying frequencies, from standard clocking to high-speed data transmission. For instance, the Generic ASVV-78.6432MHZ-L50-N102-T provides a specific 78.6432MHz frequency with CMOS output, which is common for many digital systems. In contrast, the AVLIS-CO YNETHE125 delivers a higher 125MHz frequency, also with CMOS output, suitable for more demanding applications. It is crucial to ensure the chosen VCXO's frequency range aligns with the system's requirements and that its output logic (CMOS, HCMOS, TTL) is compatible with the downstream components. The AVLIS-CO CVXO-018TX-50-19.44 operates at 19.44MHz with HCMOS, which might be preferred for specific noise immunity or drive strength characteristics in certain designs.
Package Type and Integration
The physical package of a VCXO significantly impacts board layout, manufacturing processes, and thermal management. Through-hole packages like the 16-PDIP of the SN74LS625N from AVLIS-CO are typically easier for prototyping and manual assembly but occupy more board space. Conversely, Surface Mount Device (SMD) packages, such as the 6-Pin SMD used by the AVLIS-CO YNETHE125 or the 4-SMD of the VG-4231CE, are compact and suitable for automated assembly in high-volume production. When space is at a premium, an SMD like the CVPD-922X-100.000, which comes in a 9x14 package, offers a significant advantage. However, SMD components often require specialized soldering equipment and expertise.
Operating Conditions and Stability
Environmental factors and electrical specifications dictate the reliability and performance of a VCXO. Key considerations include the operating temperature range, supply voltage, and frequency stability (often expressed in PPM). For industrial or automotive applications, a wide temperature range like -40 to 85°C, as seen in the CVPD-922X-100.000 or the BR-77.760MBE-T, is essential for consistent performance. Standard commercial applications, such as those compatible with the SN74LS625N, typically operate from 0 to 70°C. Supply voltage, commonly 3.3V as specified for the VG-4231CE or BR-77.760MBE-T, must match the system's power rails. Frequency stability, like the 50 PPM offered by some AVLIS-CO models, indicates how much the frequency can deviate under varying conditions, a critical factor for precision timing applications.
Pros & Cons
SN74LS625N Oscillators VCXO Dual Voltage-Controlled oscillators 16-PDIP 0 to 70
Pros
- Offers dual voltage-controlled oscillator outputs, providing flexibility for multiple clocking needs from a single component.
- Utilizes a widely recognized SN74LS625N part number, suggesting broad compatibility and established design resources.
- The 16-PDIP package is generally user-friendly for breadboarding and prototyping, simplifying initial development phases.
Cons
- The PDIP package occupies a larger footprint on a PCB compared to modern SMD alternatives, which can be restrictive for compact designs.
- As an LS-series part, it may have limited frequency range and higher power consumption compared to newer, more efficient VCXO technologies.
(1Pcs) ASVV-78.6432MHZ-L50-N102-T VCXO Oscillators XTAL VCXO 78.6432MHZ CMOS
Pros
- Provides a specific and common frequency of 78.6432MHz, often required for standard communication protocols.
- Features a CMOS output, which is a widely compatible logic family for integration into various digital circuits.
- As a 'Generic' component, it often implies a standardized design, potentially leading to easier sourcing and second-sourcing.
Cons
- Lacks detailed specifications regarding temperature range or specific stability, which can be a concern for critical applications.
- Being a single-frequency part, it offers less versatility compared to programmable or wider-range VCXOs for evolving system requirements.
AVLIS-CO YNETHE125 Controlled Oscillator 125MHz VCXO CMOS 6-Pin SMD, RoHS, Cut Tape
Pros
- Delivers a high output frequency of 125MHz, suitable for demanding high-speed data and clocking applications.
- Comes in a compact 6-Pin SMD package, which is ideal for space-constrained modern electronic designs.
- RoHS compliance indicates adherence to environmental standards, a key consideration for global product distribution.
Cons
- The SMD package requires specific soldering equipment and techniques, potentially increasing assembly complexity for hobbyists or small-scale prototyping.
- Higher frequencies can sometimes lead to increased power consumption and more complex PCB layout considerations for signal integrity.
Common Mistakes to Avoid
Overlooking Package Compatibility
A common pitfall involves selecting a VCXO with an incompatible package type for the intended PCB design. For instance, opting for a through-hole 16-PDIP component like the SN74LS625N by AVLIS-CO when the board is designed exclusively for surface-mount devices (SMD) will lead to assembly issues. Conversely, attempting to hand-solder a fine-pitch 6-Pin SMD like the AVLIS-CO YNETHE125 without proper tools can result in unreliable connections. Always verify the physical dimensions and mounting requirements against your board layout before committing to a purchase.
Neglecting Frequency and Output Logic Matching
Designers often focus solely on the nominal frequency, neglecting the output logic and its compatibility with the receiving circuit. A VCXO like the Generic ASVV-78.6432MHZ-L50-N102-T outputs CMOS logic, which might not directly interface with a system expecting TTL or LVDS without proper level shifting. Similarly, assuming all VCXOs are suitable for high-speed data without checking their specific frequency range and jitter performance can lead to signal integrity problems. For example, a 19.44MHz HCMOS part from AVLIS-CO (CVXO-018TX-50-19.44) has different drive characteristics than a 125MHz CMOS part.
Ignoring Operating Environment Specifications
VCXO performance can degrade significantly outside its specified operating conditions. A frequent mistake is using a VCXO designed for commercial temperature ranges (e.g., 0 to 70°C for the SN74LS625N) in industrial environments that experience extreme cold or heat. Products like the CVPD-922X-100.000 or BR-77.760MBE-T specify a wider -40 to 85°C range for a reason. Failing to consider the required supply voltage, such as the 3.3V for the VG-4231CE, can also lead to instability or component failure, impacting overall system reliability.
