# Frequency Management International > Complete SOLUTIONS in High-Reliability & Extreme Environment Frequency Control Devices --- ## Pages - [Pressure Tolerant | Subsea](https://frequencymanagement.com/products/pressure-tolerant-subsea/) - [Legal | Warranty](https://frequencymanagement.com/legal-warranty/) - [Crystals](https://frequencymanagement.com/products/crystals/) - [Oscillators](https://frequencymanagement.com/products/oscillators/) - [VCXOs](https://frequencymanagement.com/products/vcxos/) - [TCXOs](https://frequencymanagement.com/products/tcxos/) - [VCTCXOs](https://frequencymanagement.com/products/vctcxos/) - [10 Hz to 110 MHz](https://frequencymanagement.com/products/10-hz-to-110-mhz/) - [32.768 KHz](https://frequencymanagement.com/products/32-768-khz/) - [32.768 KHz Tuning Fork](https://frequencymanagement.com/products/32-768-khz-tuning-fork/) - [Real Time Clock Modules (RTC)](https://frequencymanagement.com/products/real-time-clock-modules-rtc/) - [VCXOs 500 KHz to 65 MHz](https://frequencymanagement.com/products/vcxos-500-khz-to-65-mhz/) - [Temperature Sensor](https://frequencymanagement.com/products/temperature-sensor/) - [Pressure Tolerant](https://frequencymanagement.com/products/pressure-tolerant/) - [Twin Pair (Time Base & Temp Sensor)](https://frequencymanagement.com/products/twin-pair-time-base-temp-sensor/) - [Products](https://frequencymanagement.com/products/) - [Commercial Space and COTS](https://frequencymanagement.com/products/commercial-space/) - [High Temperature](https://frequencymanagement.com/products/high-temperature/) - [Military | Avionics](https://frequencymanagement.com/products/military-avionics/) - [Commercial](https://frequencymanagement.com/products/commercial/) - [Hi-Temp Oscillators](https://frequencymanagement.com/products/hi-temp-oscillators/) - [Hi-Temp Crystals](https://frequencymanagement.com/products/hi-temp-crystals/) - [Hi-Reliability Space](https://frequencymanagement.com/products/hi-rel-space/) - [Corporate | About FMI](https://frequencymanagement.com/corporate-about-fmi/) - [Quality Assurance](https://frequencymanagement.com/quality-assurance/) - [Sales](https://frequencymanagement.com/sales/) - [Contact Us](https://frequencymanagement.com/contact-us/) - [Home](https://frequencymanagement.com/) --- # # Detailed Content ## Pages Pressure Tolerant | Subsea Extreme Environment SMD high-pressure tolerant crystal oscillators. --- Legal | Warranty WARRANTY POLICY All of the material sold by FREQUENCY MANAGEMENT | INTERNATIONAL carries a one year, limited warranty. We will repair or replace, to the original purchaser, any material found to be defective. Damage or misuse will void this warranty. All returns must be authorized prior to shipment and returned prepaid. LEGAL | PRIVACY FREQUENCY MANAGEMENT | INTERNATIONAL maintains legal status across our divisions & we take your privacy serious. This Privacy Policy covers FMI's treatment of personally identifiable information that FMI collects when you are on the FMI site, and when you use our services. This policy also covers FMI's treatment of any personally identifiable information that FMI's business partners share with us or that we may collect on a partner's site. --- Commercial - Crystals Frequency Management International manufactures high quality quartz crystals in thru-hole & SMD (surface mount) packages. Communications crystals, microprocessor crystals, and watch crystals are among our product offering. Applications include computer peripherals, industrial instrumentation, oil drilling, geothermal, commercial space, LAN/WAN, optical networks, process controls, telecommunications and wireless products. We offer a wide variety of standard and custom quartz crystals for commercial, industrial, military, high-rel (high-reliability), high-temperature and rugged applications. Ceramic SMD Crystals Plastic SMD Crystals Low-Profile Molded SMD Crystals Thru-hole Crystals Thru-hole Cylindrical Crystals Ceramic SMD Crystals Plastic SMD Crystals Low-Profile Molded SMD Crystals Thru-hole Crystals Thru-hole Cylindrical Crystals --- Commercial - Oscillators Frequency Management International manufactures a wide variety of crystal clock oscillators (XOs). Our oscillator products are in standard and custom thru-hole oscillator packages and SMD (surface mount) clock oscillator packages. The FMI crystal clock oscillator product line includes low voltage differential signaling (lvds), positive-referenced emitter-coupled logic (pecl), sinewave & clipped sinewave, hcmos & ttl clock, low-voltage, voltage controlled and temperature compensated oscillators. Applications for crystal closk oscillators include computer peripherals, industrial instrumentation, LAN/WAN, optical networks, process controls, telecommunications and wireless products. Ceramic SMD Oscillators - CMOS Ceramic SMD Oscillators - PECL/LVPECL Ceramic SMD Oscillators - LVDS Thru-hole Oscillators - PECL/LVPECL Thru-hole Oscillators - CMOS Ceramic SMD Oscillators - CMOS Ceramic SMD Oscillators - PECL/LVPECL Ceramic SMD Oscillators - LVDS Thru-hole Oscillators - PECL/LVPECL Thru-hole Oscillators - CMOS --- Commercial - Voltage Controlled Crystal Oscillators (VCXOs) FMI manufactures high quality Voltage Controlled Crystal Oscillators (VCXOs) including LVDS VCXOs in standard and custom surface mount and thru-hole packages. A VCXO allows the user to vary the output by varying a control voltage to pin 1. Control voltage is usually specified by a max & min voltage applied to pin 1 of VCXO oscillators. Typical control voltage ranges are 0. 5 to 4. 5 Vdc for a 5. 0 Vdc supply voltage and 0. 3 to 3. 0 Vdc for a 3. 3 Vdc supply voltage. The center frequency of a VCXO is the output at the center control voltage @ +25°C. It is specified as a target with an allowable deviation. The target frequency is specified in MHz or kHz and tolerance is in ± ppm. Ceramic SMD VCXOs - CMOS Ceramic SMD VCXOs - LVDS Thru-hole VCXOs - CMOS Ceramic SMD VCXOs - LVPECL Thru-hole VCXOs - PECL, LVPECL Ceramic SMD VCXOs - CMOS Ceramic SMD VCXOs - LVDS Thru-hole VCXOs - CMOS Ceramic SMD VCXOs - LVPECL Thru-hole VCXOs - PECL, LVPECL --- Commercial - Temperature Compensated Quartz Crystal Oscillators (TCXOs) Frequency Management Intl. manufactures high quality Temperature Compensated Quartz Crystal Oscillators (TCXOs) that include HCMOS, TTL, and sinewave oscillator designs. Our quartz crystal oscillators offer your application superior, reliable performance that is unparalleled in the industry. As a domestic manufacturer, we have the production, engineering and logistics resources necessary to support your design, prototype and manufacturing needs. For more information on our Temperature Compensated Quartz Crystal Oscillators, contact us at (800) 800-9825 . Ceramic SMD TCXOs - CMOS & Clipped Sinewave Thru-Hole TCXOs - CMOS & Clipped Sinewave Ceramic SMD TCXOs - CMOS & Clipped Sinewave Thru-Hole TCXOs - CMOS & Clipped Sinewave --- Voltage Controlled Temperature Compensated Crystal Oscillators (VCTCXOs) Frequency Management Intl. manufactures high quality voltage controlled temperature compensated crystal oscillators (VCTCXOs). Our VCTCXO products include HCMOS, TTL, and sinewave oscillator designs. Our products have a wide range of applications in wireless telecommunications such as portable telephone, VHF/UHF radios, CATV, instrument for GPS, PLL circuits, AFC circuits, and radio frequency (RF) modules. Our industrial & high reliability application product offers VCTCXO and phase locked sources. Our voltage controlled temperature compensated crystal oscillators products are offered in both traditional through-hole packages and surface mount packages including the smallest of the small. Ceramic SMD VCTCXOs - CMOS & Clipped Sinewave Thru-Hole TCXOs - CMOS & Clipped Sinewave Ceramic SMD VCTCXOs - CMOS & Clipped Sinewave Thru-Hole TCXOs - CMOS & Clipped Sinewave --- Hi-Rel | High-Temperature - Oscillators - 10 Hz to 110 MHz High-Temperature Oscillators manufactured by Frequency Management International provide High-Reliability solutions to meet all your high temperature crystal clock (XO, XOs) oscillator needs. Capable of operating in temperature ranges of -100°C to +300°C, these precision crystal clock oscillators are resistant to shock and vibration. Our High Temperature XOs support a wide range of supply voltages, frequency ranges, and come in industry standard packages or custom packaging. Applications include oil drilling, geothermal, commercial space, aircraft engine, aerospace & military, industrial instrumentation. We offer a wide variety of High-Temperature standard & custom quartz crystal oscillators. --- Hi-Rel | High-Temperature - Oscillators - 32. 768 KHz High-Temperature Oscillators manufactured by Frequency Management International provide High-Reliability solutions to meet all your high temperature crystal clock (XO, XOs) oscillator needs. Capable of operating in temperature ranges of -100°C to +300°C, these precision crystal clock oscillators are resistant to shock and vibration. Our High Temperature XOs support a wide range of supply voltages, frequency ranges, and come in industry standard packages or custom packaging. Applications include oil drilling, geothermal, commercial space, aircraft engine, aerospace & military, industrial instrumentation. We offer a wide variety of High-Temperature standard & custom quartz crystal oscillators. --- Hi-Rel | High-Temperature - Oscillators - 32. 768 KHz - Tuning Fork High-Temperature Oscillators manufactured by Frequency Management International provide High-Reliability solutions to meet all your high temperature crystal clock (XO, XOs) oscillator needs. Capable of operating in temperature ranges of -100°C to +300°C, these precision crystal clock oscillators are resistant to shock and vibration. Our High Temperature XOs support a wide range of supply voltages, frequency ranges, and come in industry standard packages or custom packaging. Applications include oil drilling, geothermal, commercial space, aircraft engine, aerospace & military, industrial instrumentation. We offer a wide variety of High-Temperature standard & custom quartz crystal oscillators. Hi-Temperature Ceramic SMD and Thru-hole Packaged Crystals High-Shock and Vibration Designs --- Hi-Rel | High-Temperature - Oscillators - RTC High-Temperature Oscillators manufactured by Frequency Management International provide High-Reliability solutions to meet all your high temperature crystal clock (XO, XOs) oscillator needs. Capable of operating in temperature ranges of -100°C to +300°C, these precision crystal clock oscillators are resistant to shock and vibration. Our High Temperature XOs support a wide range of supply voltages, frequency ranges, and come in industry standard packages or custom packaging. Applications include oil drilling, geothermal, commercial space, aircraft engine, aerospace & military, industrial instrumentation. We offer a wide variety of High-Temperature standard & custom quartz crystal oscillators. Hi-Temperature Ceramic SMD and Thru-hole Package Crystal OscillatorsHigh-Shock and Vibration Designs --- Hi-Rel | High-Temperature - VCXOs Frequency Management International manufactures High-Reliability, High-Temperature rugged Voltage Controlled Crystal Oscillators to meet your high temp VCXO needs. Capable of operating in temperature ranges of -55°C to +205°C, these precision voltage controlled clock oscillators are resistant to shock and vibration. Our Hi-Temp VCXOs support a wide range of supply voltages, frequency ranges, and come in industry standard packages or custom packaging. Applications include oil drilling, geothermal, commercial space, aircraft engine, aerospace & military, industrial instrumentation. We offer a wide variety of standard & custom quartz crystal oscillators. Hi-Temperature Ceramic SMD and Thru-hole Package Voltage Controlled Crystal OscillatorsHigh-Shock and Vibration Designs --- Hi-Rel | High-Temperature - Sensors Frequency Management International manufactures high quality quartz crystal sensors in Thru-hole & SMD (surface mount) packages. Applications include oil drilling, geothermal, commercial space, aircraft engine, aerospace and military, and industrial instrumentation. We offer a wide variety of standard & custom quartz crystal and oscillator sensors for your high-rel (high-reliability), high-temperature, and rugged quality critical applications - resistant to High-Shock and Vibration. Hi-Temperature Ceramic SMD and Thru-hole Packaged Crystal SensorsHigh-Shock and Vibration Designs --- Hi-Rel | High-Temperature - Oscillators - Pressure Tolerant High-Temperature Oscillators manufactured by Frequency Management International provide High-Reliability solutions to meet all your high temperature crystal clock (XO, XOs) oscillator needs. Capable of operating in temperature ranges of -100°C to +300°C, these precision crystal clock oscillators are resistant to shock and vibration. Our High Temperature XOs support a wide range of supply voltages, frequency ranges, and come in industry standard packages or custom packaging. Applications include oil drilling, geothermal, commercial space, aircraft engine, aerospace & military, industrial instrumentation. We offer a wide variety of High-Temperature standard & custom quartz crystal oscillators. Hi-Temperature Ceramic SMD and Thru-hole Package Crystal OscillatorsHigh-Shock and Vibration Designs --- FMI Products Hi-Rel Space Products Commercial Space Product Hi-Temp Oscillators Hi-Temp Crystals Mil | Aero Products Pressure Tolerant | Subsea Industrial | Commercial Products --- Commercial Space and COTS Products CubeSat & SmallSat Hi-Reliability Ceramic SMD and Ceramic Thru-hole Package Crystal Oscillators 50 krad SI (TID) for SmallSat / CubeSat SPACE Applications; LEO | MEO | GEO. 6 Months to 1 year, 1 to 2 Year and 3 Year to 5 Year Mission Life Options. Now offering COTS - Commercial Off The Shelf Crystal Oscillators for CubeSats. --- High-Temperature | Extreme Temperature | Hi-Rel Products High-Temperature Products manufactured by Frequency Management International provide High-Reliability solutions to meet all your high temperature crystal clock (XO, XOs) oscillator needs. Capable of operating in temperature ranges of -100°C to +300°C, these precision crystal clock oscillators are resistant to shock and vibration. Our High Temperature XOs support a wide range of supply voltages, frequency ranges, and come in industry standard packages or custom packaging. Applications include oil drilling, geothermal, commercial space, aircraft engine, aerospace & military, industrial instrumentation. We offer a wide variety of High-Temperature standard & custom quartz crystals and oscillators. High-Temperature Oscillators Hi-Temp Oscillators10 Hz to 110 MHz Hi-Temp Oscillators32. 768 KHz Tight Stability Hi-Temp Oscillators32. 768 KHz Tuning Fork Hi-Temp OscillatorsReal Time Clock Modules (RTC) Hi-Temp OscillatorsVCXOs 500 KHz to 65 MHz Hi-Temp OscillatorsTemperature Sensor Hi-Temp OscillatorsPressure Tolerant Hi-Temp OscillatorsTwin Pair (Time Base & Temp Sensor) High-Temperature Crystals Hi-Temp Crystals High Temperature Applications Jet Engine Sensors Automotive Engine Sensors Logging Instrumentation Reservoir Monitoring Drill Guidance & Navigation Geothermal Renewable Reservoir Monitoring Mobile Emergency Utility Power Generators Subsea Industrial Applications that include: Temperature & Pressure --- Military | Aerospace | Avionics High-Reliability Crystal Oscillators in Compliance with MIL-PRF-55310, Product Levels B and S Hi-Reliability Ceramic SMD and Thru-hole Package Crystal Oscillators for MILITARY, AEROSPACE, and AVIONICS Applications. --- Industrial | Commercial Products Commercial - Crystals Commercial - Oscillators Commercial - VCXOs Commercial - TCXOs Commercial - VCTCXOs Featured Products FMOCXS20 SERIES - Clock Oscillator FMXMB SERIES - Thru-Hole Crystal Commercial Applications Transportation Medical Wireless Sensors High-Speed Networking Test & Measurement Fiber Optics Motion Control GPS Fiber Optics --- High-Temperature | Extreme Temperature | Hi-Rel Products High-Temperature, extreme environment, high reliability oscillators. Hi-Temp Oscillators10 Hz to 110 MHz Hi-Temp Oscillators32. 768 KHz Tight Stability Hi-Temp Oscillators32. 768 KHz Tuning Fork Hi-Temp OscillatorsReal Time Clock Modules (RTC) Hi-Temp OscillatorsVCXOs 500 KHz to 65 MHz Hi-Temp OscillatorsTemperature Sensor Hi-Temp OscillatorsPressure Tolerant Hi-Temp OscillatorsTwin Pair (Time Base & Temp Sensor) --- Hi-Rel | High-Temperature - Crystals High Temperature Crystals manufactured by Frequency Management International offer high quality quartz crystal solutions in Thru-hole & SMD (surface mount) packages. Applications include oil drilling, geothermal, commercial space, aircraft engine, aerospace and military, and industrial instrumentation. We offer a wide variety of standard & custom quartz crystals for your high-rel (high-reliability), high-temperature, and rugged quality critical applications - resistant to High-Shock and Vibration. --- FMI Space Products 100/300 Krad/Si-TID High-Reliability Oscillators manufactured by Frequency Management International for Space Applications designed to meet the most demanding requirements. Hi-Reliability Ceramic SMD and Thru-hole Package Crystal Oscillators for 100 / 300 krad SPACE Applications. --- Corporate | About FMI Established in 1971 as a captive supplier for Standard Communications Corp. , we have been supplying quick delivery and tight tolerance, quartz crystals and crystal oscillators to the communications market for more than thirty years. In 1992, Frequency Management had expanded into the OEM marketplace. FMI, Frequency Management International, was established to offer engineered solutions in frequency and timing control to a wide variety of electronic system applications in diversified industries. FMI is a true solutions orientated US based manufacturer. We currently supply products to a variety of market segments including: Extreme Environment Energy Exploration Oil & Gas exploration (various directional drilling tools) Oil & Gas production tools Geothermal / Hydrothermal monitoring tools Space Scientific (low-earth orbit) Scientific (deep space) Commercial Military and Aerospace Avionics Navigation Control Systems Commercial & Industrial Telecomm (wired or wireless) Wireless (including utility metering and high-volume miniature modems like XBee) Industrial Controls (including metering) Automotive (engine sensor and others) Computer Peripherals LAN/WAN Optical Networks Process controls As a USA domestic manufacturer we have the production, engineering, and logistics resources necessary to support your design, prototype, and manufacturing needs of quartz crystals and crystal oscillators. Our industrial & hi-rel application product offering ranges from high-reliability Quartz Crystals and Clock Oscillators to VCTCXOs and Phase Locked Sources. Our products are offered in both traditional through-hole packages and Surface Mount (SMD) Packages including the smallest of the small. Design, production, and quality processes are inherent in all our industrial & hi-rel product lines including... --- Quality Assurance QUALITY SYSTEM FMI Quality Statement FMI strives to achieve the best quality and reliability performance of all our products emphasizing quality at every phase of our operation from product development through manufacturing and delivery. FMI Quality Policy "Management and Employees at Frequency Management International are empowered and committed to continuously improve all aspects of activities to satisfy our customers and remain a Quality Focused Company. " Our quality policy is integral to the purpose of our organization, and also guides the way we accomplish that purpose. It includes a commitment to comply with requirements and continually improve the effectiveness of the Quality Management System. Our policy indicates our focus, what is important to us as an organization: meeting or exceeding customer requirements; and it prescribes the method by which we accomplish this: total participation of our people in order to continuously improve our processes, products, and services. QUALITY OVERVIEW FMI Quality Manual The Quality Manual defines the Quality Management System implemented at Frequency Management International, in accordance with ISO 9001:2015 standard. This Quality Manual identifies the Quality Policies, Procedures, and Objectives to support Frequency Management International's Business Plan and to ensure that our products and services meet both the specified customer requirements and our business objectives in a consistent, economical, and reliable manner. FMI's success and prosperity is dependent upon our customers' satisfaction. Request Quality Manual. Design and Development FMI takes pride in providing custom products to our customers for their very specific application. Design and development of... --- Sales Direct Sales All Regions (Huntington Beach, CA - Headquarters):Telephone: 714-373-8100; free: 800-800-9825Fax: 714-373-8700Email: sales@frequencymanagement. com United States and Canada International Distributors United States and Canada International Distributors --- Contact Us Contact FMI Click on the links below to contact the desired FMI Department by email. Sales Customer Service Marketing Purchasing Quality Assurance Accounting Human Resources We are conveniently located within easy reach of 3 major Airports: John Wayne Airport Long Beach Airport Los Angeles International --- Commercial SpaceCommercial Space ProductsSmallSat Oscillators manufactured by Frequency Management Int'l provide High-Rel solutions to meet your 6 month to 5 year mission requirements. View ProductsHi-Rel SpaceHi-Rel Space ProductsHigh-Reliability Oscillators manufactured by Frequency Management International for Space Applications designed to meet the most demanding requirements. View ProductsHigh TemperatureHigh-Temperature ProductsHigh-Temperature Products manufactured by Frequency Management International provide High-Reliability solutions to meet all your high temperature crystal clock (XO, XOs) oscillator needs. View ProductsMil | AeroMilitary | AvionicsHigh-Reliability crystal oscillators in compliance with MIL-PRF-55310, Product Levels B and S. View ProductsCommercialIndustrial | CommercialView Products Complete SOLUTIONS in High-Reliability & Extreme Environment Frequency Control Devices Featured Products Hi-Rel Space S85 SERIES - Crystal Oscillator S55 SERIES - Crystal Oscillator Commercial Space C33 SERIES - Crystal Oscillator C55 SERIES - Crystal Oscillator High Temperature ALP5326 Crystal Oscillator HLP3226 Crystal Oscillator Military | Avionics MIL-PRF-55310/41 Crystal Oscillator M90 SERIES - Crystal Oscillator Markets Served Brochures Commercial Space Products (PDF) Hi-Temp Products (PDF) Mil | Aero Products (PDF) Industrial | Commercial Products (PDF) About FMI High Reliability - Extreme Temperature Crystals, Oscillators, and Sensors for Extreme Environmental Conditions including High Shock and Vibration, Extreme Temperatures, and High Pressure. Our Crystal Oscillator Products are available in standard and custom Surface Mount (SMT, SMD) and Thru-hole packages. Our Design, Production and Quality Processes, and Standards are supported by the various industry certifications and embedded in the performance of all of our products. Our extensive history and specialization in Hi-Rel extreme environment electronics have resulted in compelling solutions that operate... --- ---