[Ecliptek Tech Talk]

Tech Talk

Frequently Asked Questions

Ecliptek EPO™ Series Oscillator

  1. What are the EPO™ series oscillators?
  2. Why do we offer the EPO™ series oscillators?
  3. How do the EPO™ series oscillators work?
  4. What benefits does this product series offer?
  5. What are the EPO™ series oscillator applications?
  6. What are the different package configurations for the EPO™ series oscillators?
  7. What input voltage (power supply) options can this product offer?
  8. What is the input current for these product series?
  9. How do I specify the overall frequency stability of an Ecliptek EPO™ series oscillator?
  10. What inclusive frequency stability options can I obtain for these oscillators?
  11. Are the period jitter characteristics of the EPO™ series different than our standard fixed frequency products?
  12. Can I obtain a non-tri-state EPO™ series oscillator?
  13. What are the differences between the tri-state(TS) and power down(PD) options?
  14. Can I obtain frequencies outside the published frequency range listed on the EPO™ datasheet?
  15. What are the differences between the EPO™ series oscillator and other similar series products offered by Ecliptek?
  16. What are the output load characteristics for these product series?
  17. Is tight duty cycle (symmetry) available for this product series?
  18. What is oscillator aging and what are the aging specifications for these oscillator series?
  19. Is start-up time specified for these product series?
  20. What are the differences between these Ecliptek BAW resonator oscillators used in the EPO™ series and the SAW resonator oscillator products offered by our competitors?
  21. As a customer, should I add both the EPO™ series oscillator and the standard fixed frequency Ecliptek product to my AVL (approved vendors listing)?
  22. What information is needed to order an EPO™ Series Oscillator?
  23. How do I electrically test these products at my facility?
  24. Are these oscillator series compatible with my existing assembly processes and equipment?
  25. Are these oscillators RoHS compliant and Pb-free?
  26. How can I obtain a RoHS compliant (Pb-free) certification for these product series?
  27. How do I layout my printed circuit board for these product series?
  28. How do I cross these product series with a competitor part number?
  29. What information is needed to obtain a quote for these product series?
  30. How do I obtain a pdf copy of the product series specification datasheet?
  31. How do I obtain a pdf copy of the specification datasheet for a specific part number?
  32. How do I obtain a pdf copy of the specification datasheet for a specific part number?
  33. Who do I contact if I have additional technical questions about the use of these product series?
  34. How do I order an oscillator that has custom requirements not specified on the standard oscillator series specification sheets?
  35. What are the "Environmental and Mechanical Specifications" for this product family?
  36. What reliabilty information is available for this product family?
  37. Is thermal resistance information available for these product series?
  38. Are IBIS models available for these product series?
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  1. What are the EPO™ series oscillators?
    The EPO™ series oscillators are simply crystal controlled oscillators in which the frequency is set using an EPROM (Electronically Programmable Read-Only- Memory) integrated circuit. Utilizing a proprietary design and an exclusive programming method, the EPO™ series oscillators are programmed to the specified frequency prior to shipment to the customer.
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  3. Why do we offer the EPO™ series oscillators?
    The EPO™ series oscillators were not designed as a replacement for the fixed frequency oscillator series. It was designed to compliment our existing fixed frequency oscillator series, offering quick turn delivery of products in a variety of packages at a reasonable price. By designing the EPO™ on the front end and the fixed frequency for large volume production on the back end, the customers needs can be served from start to finish.

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  4. How do the EPO™ series oscillators work?
    The EPO™ series oscillators consist of a fundamental mode crystal controlled oscillator and an EPROM integrated circuit. The EPROM contains programmable functions that control the operating characteristics of the device (i.e. output frequency, output drive, power down versus tri-state, 5.0Vdc versus 3.3Vdc supply voltage, and duty cycle).
    At the heart of the EPO™ EPROM is a programmable high resolution PLL (Phase Locked Loop, see Figure 1). The PLL consists of a reference counter divider, a feedback counter multiplier, and an output divider. Utilizing a proprietary design and an exclusive programming methodology, the EPO™ series oscillator is programmed with specific values that define the operating characteristics of the oscillator.

    Figure 1: PLL Block Diagram

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  6. What benefits does this product series offer?
    The EPO™ series oscillators have very short lead times with cost effective pricing. Oscillators can be shipped in as little as 1 day. Additionally, there are no minimum order quantities on any of the EPO™ series products.
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  8. What are the EPO™ series oscillator applications?
    The EPO™ series oscillators can be used by any customer who is currently using our standard fixed frequency crystal oscillator products. However, it is recommended that the customer obtain the applicable specifications from our web site and compare all electrical and mechanical parameters of each series. Here is a list of the most common applications for the EPO™ series oscillators.
    • Set-top Boxes
    • Scanners/Printers
    • Modems
    • LCD Displays and HDTV
    • Interface Controllers
    • Medical Equipment
    • PDA's and Portable Media Players
    • Digital Cameras and Gaming Products
    • Notebook Computers
    • Video Cameras and Video Recorders
    • Portable Devices
    • Computer Peripherals and Networking Products
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  10. What are the different package configurations for the EPO™ series oscillators?
    The EPO™ series products are offered in industry standard packages. They are currently offered in a 14 or 8 Pin metal can DIP (EP11 or EP13) package, a 5mm by 7mm ceramic four pad SMD package (EP25 or EP26), a 3.2mm by 5mm ceramic four pad SMD package (EP35 or EP36), a 2.5mm by 3.2mm ceramic four pad SMD package (EP13E7, EP15E7 or EP16E7) and a plastic j-lead SMD package (EP14 or EP15). The package dimensions for each product series can be found on the applicable specification sheet.
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  12. What input voltage (power supply) options can this product offer?
    The metal can EP11 series, the 5mm x 7mm ceramic EP25 series, the 3.2mm x 5mm ceramic EP35 series, and the plastic EP14 series are 5.0Vdc versions. The metal can EP13 series, the 5mm x 7mm ceramic EP26 series, the 3.2mm x 5mm ceramic EP36 series, the 2.5mm x 3.2mm ceramic EP13E7 series, and the plastic EP15 series are 3.3Vdc versions. The 2.5mm x 3.2mm ceramic EP15E7 series is offered at 2.5Vdc and the 2.5mm x 3.2mm ceramic EP16E7 series is offered at 1.8Vdc for lower voltage applications.
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  14. What is the input current for these product series?
    The input current specification is listed in milliamps as a maximum value on the respective datasheet.
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  16. How do I specify the overall frequency stability of an Ecliptek EPO™ series oscillator?
    Ecliptek specifies the frequency stability performance of the device inclusive of specific oscillator operating conditions. This is often called the "Inclusive Method". Ecliptek specifies the following parameters for these series of products:
    • Calibration Tolerance at 25°C
    • Frequency Stability over Operating Temperature Range
    • Supply Voltage
    • Output Load
    • First Year Aging at 25°C
    • 260°C Reflow
    • Shock
    • Vibration
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  18. What inclusive frequency stability options can I obtain for these oscillators?
    Ecliptek offers ±100ppm, ±50ppm, and ±25ppm frequency stability options, depending upon the applicable series. These frequency stability options apply for both the 20°C to +70°C and 40°C to +85°C operating temperature range.
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  20. Are the period jitter characteristics of the EPO™ series different than our standard fixed frequency products?
    In certain cases, EPO™ series period jitter may be higher than the Ecliptek standard fixed frequency products. It is recommended that customers review the applicable specifications from our web site and compare the jitter specification at the specific frequency of operation and input voltage condition. In conjunction with using a proprietary design and exclusive programming methods, Ecliptek has implemented controlled rise and fall times, unique output driver circuitry, and innovative circuit layout techniques enabling the EPO™ oscillator to have exceptionally low jitter.
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  22. Can I obtain a non-tri-state EPO™ series oscillator?
    Because Ecliptek uses a 2 wire 4 pin programming interface, this series product does not offer a no connect(NC) option for pin 1. Only the power down (PD) and tri-state/output enable (TS) options are available. However, the customer can use the EPO™ oscillator as a non-tri-state oscillator by setting the control voltage on pin 1 to either no connect or logic high. The oscillator has an internal pull up resistor on pin 1.
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  24. What are the differences between the tri-state(TS) and power down(PD) options?
    The EPO™ oscillator contains EPROM programmable power down (PD) and tri- state/output enable (TS) options for power management.
    If the power down function is selected, then all active circuitry within the oscillator is shut down when the voltage at the control pad/pin is set to a logic low state. In this condition, the output signal is forced to a logic low and the input current on the power supply line is negligible (typically less than 10uA). The power down disable current can be found on the applicable datasheet.
    If the tri-state/output enable option is selected, the output is three-stated (tri-state) when the voltage at the control pad/pin (pad/pin 1) is set to a logic low state. In this condition, the oscillator and PLL continue to operate. However, the output signal is now high impedance and the input current on the power supply line is only slightly decreased from normal operating current (typically 70% of steady state current consumption). The tri-state disable current can be found on the applicable datasheet.
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  26. Can I obtain frequencies outside the published frequency range listed on the EPO™ datasheet?
    The EPO™ series features standard frequencies or frequency ranges as outlined on the applicable datasheet. Certain frequencies not listed on the datasheet can be provided on a case by case basis. Please consult the factory with your specific requirements.
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  28. What are the differences between the EPO™ series oscillator and other similar series products offered by Ecliptek?
    Although mechanically identical to other Ecliptek oscillator series, there are some electrical differences. It is recommended that the customer obtain the applicable specifications from our web site and compare the electrical parameter(s) in question.

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  29. What are the output load characteristics for these product series?
    These series of oscillators have a high speed CMOS output driver that enables the output signal to swing from ground to VDD. The oscillator output topology is designed so as to optimize circuit load matching and signal performance. Signal integrity is optimized when the low impedance output of the oscillator is driving a high impedance-low capacitance input.
    The output load specification is listed on the applicable datasheet. If a customer requires a different load from that specified on the datasheet, please contact Ecliptek with your custom requirements.
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  31. Is tight duty cycle (symmetry) available for this product series?
    Tight duty cycle (45% minimum, 55% maximum) is available for these product series. However, for certain series, it may not be for all frequency ranges. Please see the applicable specification datasheet for tight duty cycle limitations.
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  33. What is oscillator aging and what are the aging specifications for these oscillator series?
    Aging is the systematic change in frequency with time due to internal changes in the quartz resonator and/or oscillator. Aging is often expressed as a maximum value in parts per million per year (ppm/year). The rate of aging is logarithmic in nature. The following factors effect oscillator aging: adsorption and desorption of contamination on the surfaces of the quartz resonator, stress relief of the mounting and bonding structures, material outgassing, and seal integrity. At a rated operating temperature of 25°C, these series of products typically age at a rate of less than ±3ppm over the first year, ±1ppm over the following year, logarithmically declining each year there after.
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  35. Is start-up time specified for these product series?
    Start-up time is defined as the time from when the power supply reaches its specified value to the time the oscillator output signal amplitude reaches its minimum voltage output logic high threshold (VOH) and the output is within the specified frequency tolerance. For the EPO™ Series, characterization test data indicates that the start-up time is typically around 2 to 3mS.
    Note: In order to ensure proper start-up, the power supply start-up should have an exponential curve typical of a capacitive charge or a linear voltage ramp. If you have a special voltage start-up profile (i.e. odd ramp steps or shapes), please contact Ecliptek to discuss possible oscillator performance issues.
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  37. What are the differences between these Ecliptek BAW resonator oscillators used in the EPO™ series and the SAW resonator oscillator products offered by our competitors?
    An end user can achieve improved frequency stability (i.e. frequency change as a function of temperature) through the use of a bulk acoustic resonator (BAW) resonator, significantly improving performance over a surface acoustic wave (SAW) oscillator. This is accomplished through the use of an AT cut quartz crystal that is used as the reference to the EPO™ oscillator. This design solution offers superior performance with a comparable cost of competing SAW-based oscillators.
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  39. As a customer, should I add both the EPO™ series oscillator and the standard fixed frequency Ecliptek product to my AVL (approved vendors listing)?
    Yes! As a customer, you should add both the EPO™ series oscillator and the standard fixed frequency Ecliptek product to your AVL in order to obtain greater cost economies. Below are a cross matrix listing EPO™ products and standard fixed frequency products.
    Package Type Supply Voltage EPO™ Series Ecliptek Standard
    Fixed Frequency Series
    Metal 5.0VDC EP11 EC11
    Metal 3.3VDC EP13 EC13
    Ceramic 5mm x 7mm 5.0VDC EP25 EC25
    Ceramic 5mm x 7mm 3.3VDC EP26 EC26
    Ceramic 3.2mm x 5mm 5.0VDC EP35 EC35
    Ceramic 3.2mm x 5mm 3.3VDC EP36 EC36
    Ceramic 2.5mm x 3.2mm 3.3VDC EP13E7 EB13E2
    Ceramic 2.5mm x 3.2mm 2.5VDC EP15E7 EB15E2

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  40. What information is needed to order an EPO™ Series Oscillator?
    Ordering on-line is simple. Simply fill in the required information in the part number constructor for the specific EPO™ series that you would like to order. You can go to a part number constructor now by selecting a link below:
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  42. How do I electrically test these products at my facility?
    It is recommended that the customer use the test fixture specified by Ecliptek. This information is available in 'Other Resources' section on the applicable series specification datasheet.
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  44. Are these oscillator series compatible with my existing assembly processes and equipment?
    If the part number is specified with the TR option (tape and reel packaging), these oscillators are delivered to the customer in EIA-481 compliant tape and reel packaging. Without the TR option, these products are delivered to the customer in bulk packaging. See the applicable specification datasheet for the tape and reel packaging dimensions and suggested solder reflow diagrams.
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  46. Are these oscillators RoHS compliant and Pb-free?
    The RoHS and Pb-free compliance status of each EPO™ series product is defined in the Ecliptek Pb-free Roadmap.
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  48. How can I obtain a RoHS compliant (Pb-free) certification for these product series?
    For RoHS compliant product, a RoHS product certification letter can be obtained directly from our website by using our Ecliptek RoHS Certification Letter Generator.
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  50. How do I layout my printed circuit board for these product series?
    The customer should layout their PCB to include proper connections for the tri-state or power down input function. See the applicable series recommended solder pad dimensions for details.
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  52. How do I cross these product series with a competitor part number?
    Please see the Ecliptek Competitor Part Number Crosser
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  54. What information is needed to obtain a quote for these product series?
    Obtaining a quote on-line is simple. Simply fill in the required information in the part number constructor for the specific series that you would like to order. This part number will define the specifications you desire. After you construct a part number, you can request a quote or check stock by following the prompts on our website.
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  56. How do I obtain a pdf copy of the product series specification datasheet?
    You can go to the specific series you desire now by selecting a link below. At the bottom of the page under Other Resources, select download specification or click on the Adobe PDF icon in the top right hand corner of the page.
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  58. How do I obtain a pdf copy of the specification datasheet for a specific part number?
    Simply fill in the required information in the part number constructor for the specific series that you would like to order. This part number will define the specifications you desire. After you construct a part number, you will be prompted with the following: Get a datasheet for this part number (PDF).
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  60. How do I obtain a pdf copy of the specification datasheet for a specific part number?
    Simply fill in the required information in the part number constructor for the specific series that you would like to order. This part number will define the specifications you desire. After you construct a part number, you will be prompted with the following: Get a datasheet for this part number (PDF).
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  62. Who do I contact if I have additional technical questions about the use of these product series?
    The Engineering Staff at Ecliptek can provide applications engineering support or answer customer technical questions.
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  64. How do I order an oscillator that has custom requirements not specified on the standard oscillator series specification sheets?
    Complete the Ecliptek Custom Oscillator Request Form from our website. From this page you will be able to enter custom specifications that are unavailable from the standard part number constructor forms. These parameters will be sent to our Engineering team where they will be evaluated. Upon acceptance, a custom part number will be assigned and an engineering document created to represent your product.
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  66. What are the "Environmental and Mechanical Specifications" for this product family?
    The "Environmental and Mechanical Specifications" for each product type is listed on the applicable specifications.
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  68. What reliabilty information is available for this product family?
    Failure in Time(FIT) and Mean Time To Failure(MTTF) reliability data is available from the factory. Please contact us with your request for this data.
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  70. Is thermal resistance information available for these product series?
    θJA and θJC values are available for these product series. Please see the Oscillator Thermal Resistance information provided.
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  72. IBIS models available for these product series?
    IBIS modeling information is available for some of these product series. The IBIS modeling information can be found in the 'Other Resources' section of the applicable datasheet. If the IBIS modeling information is not available for your desired series, please contact us with your request for this data.
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