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SPECIFYING SURFACE MOUNT QUARTZ CRYSTALS
A typical surface mount quartz crystal specification reads like this:
SURFACE MOUNT QUARTZ CRYSTALS
Frequency Stability Frequency stability is normally specified as a frequency tolerance over a defined operating temperature range with respect to the frequency at reference temperature. The temperature ranges are defined for each crystal in the relevant data sheet. However the majority of crystals will continue to operate quite satisfactorily outside the temperature range for which they are specified, but with a possible degradation in the value of frequency stability. Under normal conditions this will not damage the crystal. A crystal designed for operation over a restricted operating temperature range, (such as from 0 to 50C) has a better frequency stability over that range than one designed for operation over a wide operating temperature range. Therefore it is important not to over specify the temperature range, as doing so will result in inferior performance for the same or greater cost; or greater cost for the same or inferior performance. Operating Temperature Ranges The standard operating temperature ranges for a crystal are:
24.0140MHz Frequency Holder Style
12SMX-B 15 30 20 18 Fund
TR T
Frequency Tolerance at 25C Frequency Stability Lower end of Operating Temp Range Circuit Condition Overtone order Packaging Additional Text Code (for non-standard product) The following specification. notes define each element of the
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Frequency
Frequency is normally specified in kilohertz (kHz) up to 999.999kHz and in megahertz (MHz) from 1.0MHz. All our computer-generated transaction documents follow this standard convention automatically. The frequency should be described to seven significant figures. If seven significant figures are not used, we assume that any figure that might follow those given may be taken as zero. Thus a frequency given as 16.6MHz will be taken as 16.60, not 16.66667. Some specifiers extend the use of kHz to all crystals operating in fundamental mode, reserving MHz for overtones. To minimise the possibility of misunderstanding it is best to use the standard method and specify fundamental or overtone mode separately. Please contact the sales office for details of developed frequencies. Holder Style Before manufacture of the crystal can start, the holder style must be defined. Each holder style covers a frequency range which is defined in the relevant specification. Frequency Tolerance The cost of manufacture depends partly on the accuracy required at reference temperature (which in the case of the AT-cut crystal, is usually 25C). Where high initial accuracy is important the additional manufacturing cost should be weighed against the cost of including a frequency trimming facility within the oscillator.
0 to 50C -10 to 60C -20 to 70C -30 to 80C
-40 to 90C -55 to 105C -55 to 125C
When the required temperature range is symmetrical about 25C, it is indicated in the specification by the lower figure, ie: -20 to 70C would read `20' as shown in the example. If the required temperature range is not symmetrical about 25C, both figures are used, ie: -55 to 85C and appear in the additional text code section (T). Circuit condition The characters `SR' are used to denote calibration of the crystal at series resonance. If it is to be calibrated at load resonance the characters represent the circuit load capacitance in pF . Packaging Codes Tray packaging is available as an option for CX-1 products outlined in the SM Quartz Crystal chapter. Unless individual data sheets state Bulk packaging, items will be Tape & Reel packed. Please note: only complete reels are sold.

BU = Bulk packed TY = Tray packed
TR = Tape & Reel packed
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Additional Text Code If the product is non-standard, the letter `T' will appear at the end of the product specification. This refers to additional text on the quotation/sales order to identify the special requirements. Outline Drawings
SURFACE MOUNT QUARTZ CRYSTALS
Dimensions on the crystal outline drawings are shown only as a guide. Precise dimensions of crystal holders are available from our Factory upon request. All dimensions are shown in mm and are nominal unless otherwise stated. Standard Frequency Tolerances and Stabilities
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10ppm, 100ppm
15ppm,
20ppm,
30ppm,
50ppm,
Soldering Conditions Recommended solder pad layouts are shown on each data sheet. For typical soldering conditions, please see the relevant page in Application Notes. Marking Where possible the frequency of operation will be marked in full on the crystal. On the smaller types the full frequency may not fit in the available space and will therefore be truncated. Please refer to the despatch packaging for the relevant crystal to see the frequency in full. Ordering Information
See individual data sheets
Stability Conversion Chart 10 x 10 -3 10 -4 10 -5 10 -6 10 -7 10 -8 10 -9 10 -10 PPM 1000 100 10 1 0.1 0.01 0.001 0.0001 0.1 0.01 0.001 0.0001 0.00001 0.000001 0.0000001 0.00000001 %
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STOCK SURFACE MOUNT QUARTZ CRYSTALS
90SMX CRYSTALS Frequency 32.7680kHz
SURFACE MOUNT QUARTZ CRYSTALS
Specification 20/-/-/6 20/-/-/6 20/-/-/12.5 20/-/-/12.5
Stock No. XTAL015822 XTAL013015 XTAL003004 XTAL002998
Alpha Code Packaging A103L A103M A103S A103D Bulk T&R Bulk T&R
Frequency
Specification
Stock No. XTAL003196 XTAL014422 XTAL003220 XTAL003232 XTAL010356 XTAL003234
Alpha Code Packaging A153C A153I A159C A161B A161I A161D A161E A161W A180C A146C A147B A147I A189C A189I Bulk T&R Bulk Bulk T&R Bulk Bulk T&R Bulk Bulk Bulk T&R Bulk T&R
14.318180MHz 50/100/20/16 14.318180MHz 50/100/20/16 14.74560MHz 16.0MHz 16.0MHz 50/100/20/16 50/100/20/16 50/100/20/16 50/100/20/20
32.7680kHz 32.7680kHz 32.7680kHz
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91SMX CRYSTALS 16.0MHz Frequency 32.7680kHz 32.7680kHz 32.7680kHz 32.7680kHz Specification 20/-/-/6 20/-/-/6 20/-/-/12.5 20/-/-/12.5 Stock No. XTAL010193 XTAL003001 XTAL003003 XTAL002999 Alpha Code Packaging 16.0MHz A103R A103G A103N A103E Bulk 16.0MHz T&R 17.734470MHz 50/100/20/16 Bulk 18.4320MHz T&R 20.0MHz 85SMX CRYSTALS Frequency 32.7680kHz 32.7680kHz 32.7680kHz 32.7680kHz Specification 20/-/-/6 20/-/-/6 20/-/-/12.5 20/-/-/12.5 Stock No. XTAL016178 XTAL017503 XTAL003000 XTAL016207 Alpha Code Packaging A103W A103K A103F A103J Bulk T&R Bulk T&R 12SMX (B) CRYSTALS 86SMX CRYSTALS Frequency 3.579545MHz 3.579545MHz 3.68640MHz 3.68640MHz 4.0MHz 4.0MHz 4.19430MHz 4.91520MHz 4.91520MHz 6.0MHz 7.37280MHz 8.0MHz 8.0MHz 10.0MHz 11.05920MHz 12.0MHz 12.0MHz Specification 50/100/20/20 50/100/20/20 50/100/20/16 50/100/20/16 50/100/20/30 50/100/20/30 50/100/20/12 50/100/20/16 50/100/20/16 50/100/20/30 Stock No. XTAL003057 XTAL015056 XTAL003258 XTAL010683 XTAL003069 XTAL012280 XTAL003088 XTAL003112 XTAL000006 XTAL003129 Alpha Code Packaging A119D A119I A169B A169I A120C A120I A123C A127C A127R A132C A194C A140C A140R A143C L108B A158D A158I Bulk T&R Bulk T&R Bulk T&R Bulk Bulk T&R Bulk Bulk Bulk T&R Bulk Bulk Bulk T&R Frequency 8.0MHz 8.0MHz 11.05920MHz 11.05920MHz 12.0MHz 12.0MHz 14.318180MHz 14.318180MHz 14.74560MHz 14.74560MHz 15.360MHz 15.360MHz 16.0MHz 16.0MHz 20.0MHz 20.0MHz 24.5760MHz 24.5760MHz Specification 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 30/50/20/16 Stock No. XTAL026380 XTAL026381 XTAL026382 XTAL026383 XTAL026384 XTAL026385 XTAL026386 XTAL026387 XTAL026388 XTAL026389 XTAL026390 XTAL026391 XTAL026392 XTAL026393 XTAL026394 XTAL026395 XTAL026396 XTAL026397 Alpha Code Packaging A140W A140X A320D A320E A158W A158X A153U A153V A159W A159X A451D A451E A161Z A161X A147U A147V A223F A223G Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R 20.0MHz 24.0MHz 24.0MHz 50/100/20/16 50/100/20/16 50/100/20/16 50/100/20/16 XTAL003178 XTAL011457 XTAL003321 XTAL012430 50/100/20/20 XTAL003175 XTAL003300 50/100/20/SR XTAL0144558 50/100/20/SR XTAL003235
50/100/20/16 XTAL0003331 50/100/20/16 XTAL0003149 50/100/20/16 XTAL0000007 50/100/20/20 XTAL0003163 50/100/20/20 XTAL0003516 50/100/20/216 XTAL0003209 50/100/20/216 XTAL010940
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HC49/4HSMX CRYSTALS Frequency 3.579545MHz 3.579545MHz 3.68640MHz 3.68640MHz 4.0MHz 4.0MHz 4.0MHz Specification 30/50/10/16 30/50/10/16 30/50/10/16 30/50/10/16 30/50/10/16 30/50/10/16 30/50/10/30 30/50/10/30 30/50/10/16 30/50/10/16 20/50/10/16 20/50/10/16 30/50/10/30 30/50/10/30 20/50/10/16 20/50/10/16 30/50/10/16 30/50/10/16 30/50/10/30 30/50/10/30 30/50/10/16 30/50/10/16 30/50/10/30 30/50/10/30 20/50/10/16 20/50/10/16 20/50/10/16 20/50/10/16 30/50/10/30 30/50/10/16 30/50/10/16 30/50/10/30 30/50/10/30 30/50/10/16 30/50/10/16 30/50/10/16 30/50/10/16 30/50/10/30 30/50/10/30 Stock No. XTAL003058 XTAL010218 XTAL003260 XTAL003265 XTAL003071 XTAL003078 XTAL011300 XTAL013676 XTAL003113 XTAL018153 XTAL026897 XTAL026898 XTAL012312 XTAL012246 XTAL026900 XTAL026901 XTAL003334 XTAL015104 XTAL010689 XTAL010386 XTAL003151 XTAL010702 XTAL011301 XTAL013919 XTAL026902 XTAL026903 XTAL026904 XTAL026905 XTAL017048 XTAL003166 XTAL011400 XTAL017145 XTAL013493 XTAL003519 XTAL010880 XTAL003210 XTAL010430 XTAL010043 XTAL005214 Alpha Code Packaging A119E A119W A169E A169N A120E A120R A120S A120H A127E A127J A128P A128R A128S A128L A132P A132R A194F A194R A194S A194G A140E A140I A140S A140L A170W A170x A173P A173R A173S A143G A143I A143S A143L L108E L108I A158E A158R A158S A158M Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R CFPX-56 CRYSTALS Frequency Specification Stock No. 32.768000kHz 32.768000kHz 20/-/-/12.5 20/-/-/12.5 XTAL008231 XTAL025159 Alpha Code Packaging A103 X A103Y Bulk T&R Frequency 14.318180MHz 14.318180MHz 14.318180MHz 14.318180MHz 14.74560MHz 14.74560MHz 14.74560MHz 14.74560MHz 16.0MHz 16.0MHz 18.4320MHz 18.4320MHz 19.66080MHz 19.66080MHz 20.0MHz 20.0MHz 20.0MHz 20.0MHz 24.0MHz 24.0MHz 24.5760MHz 24.5760MHz 25.0MHz 25.0MHz 28.2240MHz 29.49120MHz Specification 20/50/10/16 20/50/10/16 30/50/10/30 30/50/10/30 20/50/10/16 20/50/10/16 30/50/10/30 30/50/10/30 30/50/10/16 30/50/10/16 20/50/10/16 20/50/10/16 20/50/10/16 20/50/10/16 30/50/10/16 30/50/10/16 30/50/10/30 30/50/10/30 30/50/10/16 30/50/10/16 30/50/10/20 30/50/10/20 30/50/10/16 30/50/10/16 30/50/10/16 30/50/10/16 Stock No. XTAL026906 XTAL026907 XTAL011650 XTAL016724 XTAL026908 XTAL026909 XTAL012313 XTAL010878 XTAL003237 XTAL013322 XTAL026911 XTAL026912 XTAL026913 XTAL026914 XTAL003181 XTAL003187 XTAL017146 XTAL017162 XTAL012504 XTAL019814 XTAL003387 XTAL018142 XTAL010595 XTAL022668 XTAL026915 XTAL026916 Alpha Code Packaging A153P A153R A153S A153N A321P A321R A159L A159G A161G A161V A146W A146X A182W A182x A147E A147R A147S A147G A189N A189R A223E A223R A187D A187E A224D A331D Bulk T&R Bulk
SURFACE MOUNT QUARTZ CRYSTALS
T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk T&R Bulk Bulk
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4.0MHz 4.91520MHz 4.91520MHz 5.0MHz 5.0MHz 5.0MHz 5.0MHz 6.0MHz 6.0MHz 7.37280MHz 7.37280MHz 7.37280MHz 7.37280MHz 8.0MHz 8.0MHz 8.0MHz 8.0MHz 8.1920MHz 8.1920MHz 9.83040MHz 9.83040MHz 9.83040MHz 10.0MHz 10.0MHz 10.0MHz 10.0MHz 11.05920MHz 11.05920MHz 12.0MHz 12.0MHz 12.0MHz 12.0MHz
CFPX-157C CRYSTALS Frequency Specification Stock No. 32.768000kHz 20/-/-/12.5 32.768000kHz 20/-/-/12.5 XTAL009501 XTAL009502 Alpha Code A102C A102D Packaging Bulk T&R
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