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GOXO-149

3.3V Surface Mount OCXO


The GOXO-149 OCXO with LVCMOS output and optional electronic frequency control, features 14.0 x 9.0 x 8.51mm surface mount package and is available with supply voltage 3.3V at frequencies from 10.0 ~ 80.0MHz.

  • 10.0 ~ 80.0MHz
  • Miniature SM package
  • Ideally suited for base stations, VSAT etc
  • Excellent phase noise characteristics
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HCD181

Low Frequency OCXO with CMOS Output


The HCD181 OCXO with CMOS output features 46 x 36 x 15mm package with separate 12.0V oven and oscillator voltage supplies, and is available at low frequencies from 30.0kHz ~ 5.0MHz.

  • 30.0kHz ~ 5.0MHz
  • HCMOS / TTL compatible output
  • Low profile package
  • Separate oven & oscillator supplies
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HCD191

Low Frequency OCXO with CMOS Output


The low frequency HCD191 OCXO with CMOS output features 46 x 36 x 15mm package and single 12.0V oven and oscillator voltage supply, and is available at low frequencies from 30.0kHz ~ 5.0MHz.

  • 30.0kHz ~ 5.0MHz
  • CMOS / TTL compatible output
  • Low profile package
  • Single supply version of HCD181
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HCD210

High Frequency Chassis Mounted OCXO with Sine Output


The HCD210 chassis mounted OCXO provides highly stable sine output up to high frequencies of 100MHz. Featuring excellent temperature stability and a choice of operating temperature ranges, the HCD210 is a great solution when a chassis mounted oven controlled oscillator is needed.

  • 5.0 ~ 100MHz
  • Frequencies up to 100MHz
  • Internal multiplier above 50.0MHz
  • Single oven & oscillator supply
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HCD220

OCXO Sine Output


The HCD220 chassis mounted oven controlled oscillator, available from 5.0 ~ 16MHz, features dual RF outputs and mechanical frequency trimming with fine frequency adjustment. Available with a range of excellent temperature stability options including as good as ±1ppb, and also in a range of supply voltages from 12~30V.

  • 5.0 ~ 16.0MHz
  • ±1ppb Temperature stability
  • Dual RF output available
  • Oven alarm option
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HCD280

High stability OCXO with low phase noise available up to 100MHz 


The HCD280 oven controlled oscillator provides excellent stability and phase noise characteristics, at frequencies from 30.0 ~ 100MHz and conforms to MIL-STD-202 standards for shock, vibration and humidity specifications. A choice of supply voltage options with sine or CMOS output is also available, find out more and configure your component here.

  • 30.0 ~ 100MHz 
  • Excellent stability
  • MIL-STD-202 Conformance
  • CMOS/Sine output
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HCD300

5V Low Profile OCXO with Sine Output


The HCD300 OCXO with sine wave output features low profile 36 x 27 x 15mm package with standard European output and is available with supply voltage 5.0V at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Temperature stability down to 50ppb
  • Single 5V oven & oscillator supply
  • Low profile compact package
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HCD301

5V Low Profile OCXO with CMOS/TTL Output


The HCD301 oven controlled oscillator with CMOS/TTL output features low profile 36 x 27 x 15mm package with standard European output and is available with supply voltage 5.0V at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Temperature stability down to 50ppb
  • Single 5V oven & oscillator supply
  • Low profile compact package
VIEW PRODUCT

HCD310

12V Low Profile OCXO with Sine Output


The HCD310 OCXO with sine wave output features low profile 36 x 27 x 15mm package with standard European output and is available with supply voltage 12.0V at frequencies from 5.0 ~ 60.0MHz.

  • 5.0 ~ 60.0MHz
  • Temperature stability down to 50ppb
  • Single 12V supply (15V or 18V optional)
  • Low profile compact package
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HCD311

12V Low Profile OCXO with CMOS/TTL Output


Featuring CMOS/TTL output and low profile 36 x 27 x 15mm package, the HCD311 OCXO is available with single oven and oscillator 12V supply at frequencies from 5.0 ~ 50.0MHz.

  • 5.0 ~ 50.0MHz
  • Temperature stability down to 50ppb
  • Low profile compact package
  • Single oven & oscillator supply
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HCD331

5V OCXO with CMOS Output


The HCD331 OCXO with CMOS output features low profile package and tight temperature stability as good as ±20ppb. The HCD331 is available with supply voltage 5.0V at frequencies from 13.0 ~ 20.0MHz.

  • 13.0 ~ 20.0MHz
  • Temperature stability down to 20ppb
  • Single 5V oven & oscillator supply
  • Low height compact package
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HCD350

5V Tight Stability OCXO with Sine Output


Featuring exceptionally tight temperature stability of ±5ppb, the HCD350 OCXO with sine wave output has standard European pin-out and is available with a single 5.0V oven and oscillator supply at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Temperature stability down to 5ppb
  • Single 5V oven & oscillator supply
  • Compact package
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HCD351

5V Tight Stability OCXO with CMOS/TTL Output


Boasting exceptionally tight temperature stability of ±5ppb, the HCD351 OCXO with CMOS output has standard European pin-out and is available with a single 5.0V oven and oscillator supply at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Temperature stability down to 5ppb
  • Single 5V oven & oscillator supply
  • Compact package
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HCD360

12V Tight Stability OCXO with Sine Output


Featuring exceptionally tight temperature stability of ±5ppb and good ageing characteristics, the HCD360 OCXO with sine wave output has standard European pin-out and is available with a single 12.0V oven and oscillator supply at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Temperature stability down to 5ppb
  • Single 12V supply (15V or 18V optional)
  • Compact package
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HCD361

12V Tight Stability OCXO with HCMOS Output


The HCD361 OCXO with CMOS output is available at frequencies from 5.0 ~ 20.0MHz and features very tight temperature stability of ±5ppb, and very low phase noise characteristics. This OCXO features a single 12.0V supply, which can be optionally configured to 15.0V or 18.0V.

  • 5.0 ~ 20.0MHz
  • Temperature stability down to 5ppb
  • Single 12V supply (15V or 18V optional)
  • Compact package
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HCD370

12V Tight Stability OCXO with Sine Output and Low Profile


The low profile HCD370 features exceptionally tight temperature stability of ±5ppb and good phase noise characteristics, the HCD370 OCXO with sine wave output has standard European pin-out and is available with a single 12.0V oven and oscillator supply at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Low height compact package
  • Temperature stability down to 5ppb
  • Single 12V supply (15V or 18V optional)
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HCD371

OCXO CMOS Output Low Height


The low profile HCD371 OCXO with CMOS output is available at frequencies from 5.0 ~ 20.0MHz and features very tight temperature stability of ±5ppb, and very low phase noise characteristics. This OCXO features a single 12.0V supply, which can be optionally configured to 15.0V or 18.0V.

  • 5.0 ~ 20.0MHz
  • Low height compact package
  • Temperature stability down to 5ppb
  • Single 12V supply (15V or 18V optional)
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HCD380

Very High Frequency OCXO with Ultra-low Phase Noise and Sine Output


The HCD380 oven controlled oscillator with sine wave output is available at very high frequencies up to 100MHz with very low phase noise of -160dBc/Hz @ 10kHz, thanks to a no multiplier design. This OCXO also features excellent temperature stability and standard european pin-out. 

  • 30.0 ~ 100MHz
  • -160dBc/Hz noise floor
  • Frequencies up to 100MHz
  • No multiplier
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HCD381

Very High Frequency OCXO with Ultra-low Phase Noise and CMOS Output


The HCD381 OCXO with CMOS output is available at very high frequencies up to 100MHz with very low phase noise of -160dBc/Hz @ 10kHz, thanks to a no multiplier design. This OCXO also features excellent temperature stability and standard european pin-out. 

  • 30.0 ~ 100MHz
  • -160dBc/Hz noise floor
  • Frequencies up to 100MHz
  • No multiplier
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HCD660

High Performance OCXO with Sine Output and European pin-out


Boasting temperature stability down to ±1ppb, the HCD660 OCXO with 51 x 41 x 25mm package and standard European pin-out, features sine wave output and is available at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Temperature stability down to 1ppb
  • Single 12V supply (12V ~ 30V optional)
  • Standard European pin-out
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HCD661

High Performance OCXO with CMOS Output and European pin-out


With excellent temperature stability down to ±1ppb, the HCD661 OCXO features CMOS output and comes encased within robust 51 x 41 x 25mm package with standard European pin-out, available at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Temperature stability down to 1ppb
  • Single 12V supply (12V ~ 30V optional)
  • Standard European pin-out
VIEW PRODUCT

HCD665

Fast Warm Up OCXO with Sine Output and European Pin-out


The HCD665 OCXO with 51 x 41 x 25mm package and standard European pin-out, features sine wave output, fast warm up and temperature stability down to ±1ppb, and is available at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Fast warm up
  • Temperature stability down to 1ppb
  • Single 12V supply (12V ~ 30V optional)
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HCD666

 Fast Warm Up OCXO with CMOS Output and European Pin-out


Featuring temperature stability down to ±1ppb, the HCD666 oven controlled oscillator features CMOS output and comes encased within robust 51 x 41 x 25mm package with standard European pin-out. Available at frequencies from 5.0 ~ 20.0MHz, this OCXO also features excellent phase noise specifications and fast warm up.

  • 5.0 ~ 20.0MHz
  • Fast warm up
  • Temperature stability down to 1ppb
  • Single 12V supply (12V ~ 30V optional)
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HCD680

High Performance OCXO with Sine Output and US pin-out


Boasting sine wave output and temperature stability down to ±1ppb, the HCD660 OCXO with 51 x 51 x 25mm package and standard US pin-out, is available at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Temperature stability down to 1ppb
  • Single 12V supply (12V ~ 30V optional)
  • Standard US footprint & pin-out
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HCD681

High Performance OCXO with CMOS Output and US pin-out


With excellent temperature stability down to ±1ppb, the HCD681 OCXO features CMOS output and comes encased within a robust 51 x 51 x 25mm package with standard US pin-out, available at frequencies from 5.0 ~ 20.0MHz.

  • 5.0 ~ 20.0MHz
  • Temperature stability down to 1ppb
  • Single 12V supply (12V ~ 30V optional)
  • Standard US footprint & pin-out
VIEW PRODUCT

What are Oven Controlled Oscillators (OCXOs) used for?

Similar to most crystal oscillators, OCXOs are commonly used in applications where extremely precise frequency control is required.

Some of the most common and well-known uses for OCXOs include:

  • Telecommunications: OCXOs are used in telecom equipment for clock synchronization and RF signal stability across the network. They must retain the system timing in the event of loss of GPS derived timing signals, a feature called holdover.
  • Instrumentation: OCXOs are used in laboratory and test equipment, such as signal generators and frequency counters, for stable and accurate frequency references.
  • Broadcasting: Broadcast equipment utilizes OCXOs for accurate timing and synchronization of audio and video signals.
  • Computing: OCXOs are used in high-performance computing systems, such as supercomputers and servers, for precise timing and synchronization of system events.

If you would like more information on OCXOs, how they are used or the range of products we have available, get in touch with one of our experts today.

How does an OCXO differ from other crystal oscillators?

OCXOs differ from other crystal oscillators, such as TCXOs (Temperature-Compensated Crystal Oscillators) and standard crystal oscillators, in their method of temperature stabilization. OCXOs maintain high stability by physically controlling the temperature of the crystal, whereas TCXOs adjust the frequency electronically in response to temperature changes. This makes OCXOs more stable but also larger and more power-hungry than TCXOs.

What are the typical applications of OCXOs?

OCXOs are commonly used in telecommunications, military, and aerospace applications where high frequency stability is crucial, regardless of environmental conditions. They are also employed in precise timing applications, such as GPS, network synchronization, and base stations.

What factors affect the performance of an OCXO?

The performance of an OCXO can be influenced by several factors, including the quality of the crystal, the design of the oven and temperature control system, ambient temperature fluctuations, power supply variations, and aging of the crystal.

How do I choose the right OCXO for my application?

Choosing the right OCXO involves considering several parameters, including frequency stability requirements, operating temperature range, power consumption, size constraints, and cost. It's essential to balance these factors against the specific needs of your application, possibly consulting with manufacturers or experts in frequency control solutions.

Can OCXOs be used in space applications?

Yes, OCXOs can be used in space applications, but they must meet specific requirements for radiation hardness, reliability, and power efficiency. MIL-COTS OCXOs are often selected for space missions due to their enhanced performance and durability under extreme conditions.

How do environmental conditions affect OCXO performance?

OCXOs are designed to minimize the impact of environmental conditions on frequency stability. However, extreme conditions beyond the specified operating range, such as very high or low temperatures, humidity, and mechanical shock or vibration, can still affect performance. Manufacturers typically specify the tolerance of their OCXOs to these conditions.

What maintenance do OCXOs require?

OCXOs generally require minimal maintenance due to their design. However, it is crucial to ensure that the power supply remains stable and to avoid exposing the device to environmental conditions outside its specified operating range. Additionally, recalibration might be necessary over time to account for the natural aging of the crystal.

What are Oven Controlled Oscillators (OCXOs) used for?

OCXOs are used in applications where extremely precise frequency control is required, such as telecommunications, instrumentation, broadcasting, and high-performance computing. They ensure stable and accurate frequency references in various systems.

What factors affect the performance of an OCXO?

Several factors can affect the performance of an OCXO, including the quality of the crystal, the design of the oven and temperature control system, ambient temperature fluctuations, power supply variations, and aging of the crystal.

How do I choose the right OCXO for my application?

Choosing the right OCXO involves considering parameters like frequency stability requirements, operating temperature range, power consumption, size constraints, and cost. It's important to balance these factors against the specific needs of your application.

How do environmental conditions affect OCXO performance?

OCXOs are designed to minimise the impact of environmental conditions on frequency stability. However, extreme conditions beyond the specified operating range, such as very high or low temperatures, humidity, and mechanical shock or vibration, can still affect performance.

What maintenance do OCXOs require?

OCXOs generally require minimal maintenance due to their design. However, it's important to ensure stable power supply and avoid exposing the device to environmental conditions outside its specified operating range. Recalibration might be necessary over time to account for natural crystal aging.

Are there different types of OCXOs available?

Yes, there are various types of OCXOs available to suit different applications and performance requirements. These include traditional OCXOs with analog temperature control circuits, digitally controlled OCXOs (DCXOs) with digital temperature compensation, and miniature OCXOs for space-constrained environments.

Can OCXOs be used in mobile devices or portable equipment?

While OCXOs provide exceptional frequency stability, they are typically larger and consume more power than other oscillator types like TCXOs. As a result, they are less suitable for mobile devices or portable equipment where size and power efficiency are prioritised.

What is holdover capability, and why is it important in OCXOs?

Holdover capability refers to an OCXO's ability to maintain accurate timing and frequency stability in the absence of an external reference signal, such as GPS. This feature is crucial in telecommunications and network synchronisation applications to ensure uninterrupted operation during signal loss or downtime.

How long does it take for an OCXO to reach its stable operating temperature?

The time it takes for an OCXO to reach its stable operating temperature depends on factors such as the design of the temperature control system and the ambient temperature conditions. Typically, most OCXOs stabilize within a few minutes to hours after power-on.

Can OCXOs operate in harsh environmental conditions, such as extreme temperatures or high humidity?

OCXOs are designed to operate reliably in a wide range of environmental conditions, including extreme temperatures, high humidity, and mechanical shock or vibration. 

However, it's essential to select OCXOs with appropriate environmental ratings and specifications for specific applications and operating environments.