International Crystal Manufacturing (ICM) offers a broad range of quartz crystals, precision crystals, oscillators, filters, TCXO / VCTCXOs, and Quartz Microbalance products. Crystal, oscillator, filter and frequency control products - collage   ICMFG.com
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TCXO and VCTCXO FAQs

To get answers to the most frequently asked questions about our TCXOs and VCTCXOs, please select one of the links below:


What is a TCXO?

A TCXO is a temperature compensated crystal oscillator. Compensation components have been added to enhance the temperature stability of the basic oscillator to improve performance in more critical applications.

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What are common applications for a TCXO?

Applications include Telecom Timing Modules, Wireless Systems Reference Oscillators (Microwave, Etc.), Precision Instruments, and other frequency sensitive applications.

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What is a VCTCXO?

A VCTCXO is a Voltage Controlled Temperature Compensated Crystal Oscillator.

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What is the difference between a VCXO and a VCTCXO?

A VCTCXO has much better stability than the stability of a VCXO because it is a VCXO with a temperature compensation network inside.

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What are common applications for a VCTCXO?

VCTCXOs have a wide range of applications in wireless telecommunications such as portable telephone, VHF/UHF, CATV, instrument for GPS, PLL circuits, AFC circuits, and Radio Frequency (RF) modules.

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What information is needed to order TCXOs or VCTCXOs from International Crystal?

To order TCXOs and VCTCXOs you must address and answer the following questions:

  • On what frequency do you wish to operate?
  • How much can the frequency vary in your system?
  • What is the temperature range the oscillator will operate over?
  • What power is available to operate the oscillator?
  • What is the voltage level and its tolerance?
  • How much current can the oscillator consume?
  • How large can this oscillator be physically?
  • What output wave shape is required in your system? (TTL, CMOS, ECL, Sine Wave)
  • What is the sine wave level and harmonic levels required?
  • What type of load will the output of the oscillator experience? (ex. 50 ohms)
  • How closely does the oscillator need to be set to frequency?
  • Do you need a trimmer to compensate for aging or crystal differences?
  • How much can the oscillator shift frequency over time?

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Will International Crystal help design a TCXO or a VCTCXO for our specific application?

ICM engineers and design staff will gladly assist you to solve your unique TCXO or VCTCXO needs.

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If you have more questions about our TCXOs and VCTCXOs, call us today at 1-800-725-1426, fill out our contact form, email us at customerservice@icmfg.com or request an online quote for International Crystal Manufacturing radio frequency control devices – quartz crystals, oscillators, QCM crystals, filters, TCXOs / VCTCXOs, and precision crystals.

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Quartz Crystals Precision Telemetry Crystal Products
International Crystal Manufacturing
10 North Lee Avenue Oklahoma City, OK 73102
Toll Free Phone: 1-800-725-1426 Toll Free Fax: 1-800-322-9426
Phone: 1-405-236-3741 Fax: 1-405-235-1904
Email: customerservice@icmfg.com

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