Series FAQs

Frequently Asked Questions
Rev A
For Series:
EQRG12
1.
What is this oscillator series?
This series of devices are oscillators where the output frequency is primarily controlled by an internal quartz bulk
acoustic wave (BAW) crystal resonator and integrated high speed steering logic (HCSL) oscillator circuit. Utilizing
a proprietary crystal resonator design and exclusive oscillator design techniques, this series of oscillators is
calibrated to a specified frequency prior to shipment to the customer.
2.
What are the typical customer circuit applications for this oscillator series?
This oscillator series can be used in any of the following applications:
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Clock Recovery
Phase-Locked Loop and Frequency Synthesis
Synthesizer or System Reference
Clock Distribution
Digital Switching Networks
Clock Translation and Multiplexing
What are the typical applications and end item products for this series?
Here is a list of the common applications and products:
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PCI Express
Gigabit Ethernet
Fiber Channel
SATA/SAS
FBDIMM, DDR, SONET, ATM, SDH
Routers, Servers, Hubs, and Network Switches
High Resolution Video and Set-top Boxes
Scanners, Printers, Modems
LCD Displays and HDTV
Interface Controllers
Medical Equipment
PDAs and Portable Media Players
Notebook Computers
Video Cameras and Video Recorders
Portable Devices
Computer Peripherals and Networking Products
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Ecliptek Frequently Asked Questions
4.
What technical benefits does this product series offer?
This series of crystal oscillator offers:
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Improved frequency stability through the use of a bulk acoustic wave (BAW) quartz crystal resonator
Use of a fundamental or third overtone mode oscillator application specific integrated circuit (ASIC)
design
Commercial, extended commercial, and industrial operating temperature range options
Pad 1 or pad 2 Standby (Tri-state, High Impedance) output options
Low stand-by current
HCSL output with fast rise and fall times
Complementary output
Superior rms phase jitter and phase noise performance
Tight duty cycle
Industry standard moisture sensitivity level one (MSL1) rated ceramic six pad SMD package
RoHS Compliant (Pb-free) with high temperature 260°C reflow capability
5.
What are the construction characteristics of this product series?
This series consists of a single application specific integrated circuit (ASIC) and a BAW quartz crystal packaged
inside a hermetically sealed ceramic leadless SMD package. The leadless SMD package has six gold plated
contact I/O pads. The package has a seam sealed metal cover that is case grounded for improved EMI
performance.
6.
What is the input supply voltage for this product series?
The nominal supply voltage and tolerance is provided on the datasheet.
7.
What are the input current specifications for this product series?
The input current specification is listed in milliamps as a maximum value and is provided on the datasheet.
8.
How do I specify the overall frequency stability for this product series?
Ecliptek defines the frequency stability performance of the device inclusive of specific oscillator operating
conditions. Ecliptek specifies the following inclusive parameters for this series of product:
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Calibration Frequency Tolerance at 25°C
Frequency Stability over Operating Temperature Range
Supply Voltage
Output Load
First Year Aging at 25°C
Shock and Vibration
What are the frequency stability and operating temperature range options for this product series?
The available operating temperature range and frequency stability options can be found on the datasheet.
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Ecliptek Frequently Asked Questions
10.
Does this series offer a Standby (Tri-state, High Impedance) output function?
This product series offers a Standby (Tri-state, High Impedance) output function to facilitate the customer's use of
in-process assembly testing. It features a control function where the output is three-stated (tri-state condition)
when the voltage at the control pad (pad one or two) is set to a logic low state. In this condition, the output signal
is three-stated (tri-state). The oscillator output gate becomes high impedance and the oscillator input current on
the power supply line is negligible.
If the voltage at the control pad is set to no connect or a logic high state, the output is enabled (clocking).
Note: The oscillator has an internal pull up resistor on the control pad. The datasheet provides the VIH and VIL
thresholds for the control pad.
Figure: Tri-State Timing Diagram
When entering the tri-state mode, the time from when the oscillator input control pad reaches VIL and the oscillator
output pad becomes high impedance is called Standby Output Disable Time and is shown as tPLZ. When exiting
the tri-state mode, the time from when the oscillator input control pad reaches VOH and the oscillator output pad
begins clocking is called Standby Output Enable Time and is shown as tPZL.
11.
Does this series offer a stand-by function?
This oscillator series contains a stand-by function for power management. All active circuitry within the oscillator is
shut down when the voltage at the control pad is set to a logic low state. In this condition, the output signal is
three-stated (tri-state). The oscillator output gate becomes high impedance and the oscillator input current on the
power supply line is negligible. The maximum stand-by current is listed on the datasheet.
12.
What is the function of the complementary output on pad five of the oscillator?
The term complementary output, often called a differential pair, is when one output signal is the logical opposite
(complement) of the other output signal. Thus, when the output (pad four) of the oscillator is in a logic high state,
the complementary output (pad five) of the oscillator is in a logic low state.
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Ecliptek Frequently Asked Questions
13.
Can I obtain a non-tri-state function for this product series?
This product series only offers a Standby (Tri-state, High Impedance) output option on pad one or pad two of the
oscillator. The customer can use this oscillator series as a non-tri-state oscillator by setting the voltage on standby
control pad to either no connect or logic high. The oscillator has an internal pull up resistor on this pad. The
datasheet provides the VIH and VIL thresholds for control of the Standby (Tri-state, High Impedance) output
function.
14.
What is oscillator aging and what are the aging specifications for this product series?
Aging is the systematic change in frequency with time due to internal changes in the crystal 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, stress relief of the mounting and bonding structures, material outgassing, and seal
integrity. The oscillator aging specification is listed on the datasheet.
15.
What are the period jitter, phase noise, and phase jitter specifications for this product series?
Period Jitter is a time domain measurement and is specified in picoseconds (pSec) as a maximum value. Phase
noise is a frequency domain measurement and is specified in decibels at various offset points from the carrier
(-dBc/Hz). Phase jitter, (often called offset jitter) is derived from the phase noise measurement of the spectral
density over a given offset bandwidth. Ecliptek uses a proprietary design, exclusive processing methods, and a
unique ASIC output driver circuit enabling this product series to have exceptionally low period jitter, rms phase
jitter, and phase noise. The period jitter, phase noise, and rms phase jitter specifications can be found on the
datasheet.
16.
What is duty cycle and what is the duty cycle specification for this product series?
Duty cycle is the measure of output waveform uniformity. This term, also referred to as symmetry, is a
measurement of the time that the output waveform is in a logic high state, expressed as a percentage (%) of the
clock period. This parameter is measured at a specified voltage threshold or at a percentage of the output
waveform amplitude. See the datasheet for measurement thresholds and load conditions.
17.
What are the output and output load characteristics for this product series?
Ecliptek offers this product series with a high-speed current steering logic (HCSL) output. The oscillator output
topology utilizes a constant current source that allows the end user to configure their output termination 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 fifty ohm transmission line. Thus, Ecliptek specifies a load termination of 50
ohms between the output and ground (as well as 50 ohms between the complementary output and ground).This
load configuration assures that any signal being reflected from the load will be absorbed by the source. The
output load specification is listed on the datasheet.
18.
Is start-up time specified for this product series?
As shown in the figure below, start-up time is defined as the time (t0) from when the power supply reaches its
specified VIH value to the time (t1) the oscillator output signal amplitude reaches its steady state VOH output logic
high level and the output is within the specified frequency tolerance. Note: The complementary output waveform
is not shown in the below figure.
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Ecliptek Frequently Asked Questions
Figure: Oscillator Start-up Timing Diagram
In order to ensure proper start-up, the power supply start-up should have an exponential curve typical of a
capacitive charge of a linear voltage ramp. The maximum start-up time specification can be found on the
datasheet.
19.
How do I electrically test this product series at my facility?
The recommended electrical test fixture can be found on the datasheet.
20.
Is this product series compatible with my existing assembly process equipment?
If the part number is specified with the TR packaging option, oscillator products are delivered to the customer in
EIA481 compliant tape and reel packaging. Without the TR option, products are delivered to the customer in bulk
packaging as specified on the datasheet.
21.
Is this product series compatible with my existing reflow processes?
This product series is capable of withstanding industry standard high temperature (260°C, 10 seconds)
convection reflow processes and is rated MSL1 per J-STD-020. The suggested solder reflow diagram is provided
on the datasheet.
22.
Is this product series RoHS compliant and Pb-free?
This product is RoHS compliant and Pb-free as defined in the Ecliptek RoHS Compliant (Pb-free) Roadmap.
23.
How can I obtain a RoHS compliant (Pb-free) certification for this product series?
A RoHS and Pb-free product certification letter can be obtained directly from our website by using the Ecliptek
RoHS/Pb-Free Certification Letter Generator.
24.
Is an IPC-1752 material declaration available for customer review?
Ecliptek can provide a Material Declaration in compliance with IPC-1752 to assist customers with their material
compliance requirements.
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Ecliptek Frequently Asked Questions
25.
How do I layout my printed circuit board for this product series?
A suggested solder pad layout is provided on the datasheet. The customer should layout their printed circuit
board to include proper connections for the pad one or pad two Standby (Tri-state, High Impedance) output option
and the complementary output (pad five). If the pad one Standby (Tri-state, High Impedance) output option is
selected, pad two should be grounded or not connected. If the pad two Standby (Tri-state, High Impedance)
output option is selected, pad one should be grounded or not connected.
26.
Who do I contact if I have additional technical questions about the use of this product series?
The Global Customer Support team at Ecliptek can provide applications engineering support or answer customer
technical questions.
27.
How do I order an oscillator that has custom requirements not specified on the standard oscillator series
specification sheet?
Please contact the Ecliptek Global Customer Support team for additional support or questions regarding your
oscillator requirements.
28.
What are the environmental and mechanical specifications for this product series?
The environmental and mechanical specifications for this product series are listed on the datasheet.
29.
What reliability information is available for this product series?
Failure in Time (FIT) and Mean Time to Failure (MTTF) reliability data is available for this product series within the
product series qualification and reliability report found on the series home page.
30.
Is thermal resistance information available for this product series?
θJA and θJC values are available for this product series and can be found on the Environmental / Mechanical
section of the series homepage.
31.
What is the marking scheme for this product series?
As shown on the datasheet, this series of product has marking content on the top of the part. This marking
consists of a pad one locator dot and additional lines of alpha numeric marking. The datasheet provides the
marking content.
32.
Can I identify the Ecliptek part number or specification based upon the markings on top of the part?
In order to protect our customer’s intellectual property, the Ecliptek part marking does not identify the Ecliptek part
number or specifications.
33.
Where can I get the information regarding discontinued or End of Life (EOL) products?
Any Ecliptek part number currently under an End of Life statement will be identified as EOL on an Ecliptek
quotation, along with a link to the EOL statement. This information can also be found on the End of Life
Statements for Discontinued and Obsolete Products section of our website.
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Ecliptek Frequently Asked Questions
34.
Is Ecliptek ISO 9000 Certified?
Yes, Ecliptek is certified to ISO 9001.
35.
How can I obtain a REACH compliance statement for this product series?
A Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) compliance statement can be
obtained directly from our website by using the Ecliptek REACH Compliance Resources page of our website.
36.
How can I obtain a Conflict Minerals Report for this product series?
A Conflict Minerals Reporting Template can be obtained directly from our website by using the Ecliptek Conflict
Minerals Compliance Resources page of our website.
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