euroquartz limited blacknell lane crewkerne somerset uk ta18 7he tel: +44 (0)1460 230000 fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk euro quartz SWCX1 swept quartz crystals radiation-resistant miniature crystals 8mhz to 250mhz SWCX1 swept quartz crystals are designed for applications requiring resistance to ionizing radiation. SWCX1 crystals are produced from cultured quartz that is electrically 'swept' at high temperature to remove interstital impurities within the crystalline structure. this process produces crystal resonators that are superior to those utilizing non-swept quartz on that they maintain their frequency and other electrical characteristics under exposure to radiation levels of 100krad (1kgy) and greater. further, as such applications requiring radiation resistance typically also require various degrees of of high-reliability components, we offer these resonators in three distinct screening options to meet mission critial programme requirements from engineering to flight. radiation tolerance up to 100krad total dose high shock and vibration resistance ultra-high reliability custom designs available military and space screening available low ageing critical processes performed in class 10 cleanroom packaging options SWCX1 crystals are avaialble in smd or leaded formats. supplied: tray packed (option for sm crystals) 16mm tape on 178mm or 330mm reels (only for sm crystals) per eia 481 (see tape and reel data sheet 10109) outlines features a 8.00 8.00 b 3.56 3.56 c (max.) 1.78 1.78 d 1.14 7.87 e 1.52 1.02 f - 3.81 SWCX1 surface-mount (mm) SWCX1 leaded (03) (mm) dim. description military and aerospace satellite space exploration systems deep space probes telemetry applications package dimensions terminations - plating sm1 gold plated sm2 solder plated sm3 / 03 solder dipped designation termination page 1 of 2 electrical specification specifications are typical unless otherwise noted. package style: SWCX1 (sm) SWCX1 (03) frequency range: 8.0mhz to 250.0mhz motional resistance (r1) @ 25c at 32mhz: 25 at 155.2mhz: 15 motional capacitance (c1) @ 25c at 32mhz: 6.2ff at 155.2mhz: 1.0ff shunt capacitance (c0) @25c: 2.3pf quality factor (q) @ 25c: 30k load capacitance (cl) <50mhz: 20pf >50mhz: 10pf drive level <50mhz: 500w maximum >50mhz: 200w maximum general specification specifications are typical unless otherwise noted. calibration tolerance @ 25c: 100ppm or tighter, as required temperature stability: refer to cx1 at datasheet ageing first year: 2ppm maximum. shock survival*: 3,000g peak 0.3ms, ? sine vibration survival: 20g, 10~2,000hz swept sine
euroquartz limited blacknell lane crewkerne somerset uk ta18 7he tel: +44 (0)1460 230000 fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk euro quartz how to order SWCX1 swept crystals SWCX1 - s - s - c - sm1 - 20.0m , 100 / 100 / ? / i screening per option code: s = space m = military e = engineering 's' for special or custom design leaded 03 surface mount sm1 sm2 sm3 frequency m = mhz calibration tolerance @25c (in ppm)* temp. range c = -10 ~ +70c i = -40 ~ +85c m = -55 ~ +125c s = customer specified frequency stability over temperature (in ppm)* SWCX1 swept quartz crystals radiation-resistant miniature crystals 8mhz to 250mhz swept quartz crystal 'c' = ceramic lid code item method comments s m e x x x made with swept quartz x x internal visual (pre-seal) company internal standard x pind testing mil-std-883 method 2020 cond. a performed in both width and thickness directions x radiographic inspection mil-std-202 method 209 x x unwanted modes mil-prf-3098 spurious mode ratio 2:1 or greater x x low temperature storage mil-prf-3098 resistance must meet specification at this low temperature. x x frequency and resistance over operating temperature range mil-prf-3098 measure every 2.5 degree c or tighter over operating temperature range; frequency and resistance must meet specification. x x x accelerated ageing 105 degree c for a minimum of 160 hours frequency and resistance must meet specification after ageing; maximum allowed change in series frequency 5ppm x x x seal test (fine leak) mil-std-883 method 1014 cond. a1 x x x seal test (gross leak) mil-std-883 method 1014 cond. c x x x external visual (post seal) company internal standard page 2 of 2 standard tests and screening options notes: s: for space-based applications. m: for military appl.ications (mil-prf-3098) e: for engineering prototypes and applications not requiring additional screening. - / - / 200 / i or: temp. range c = -10 ~ +70c i = -40 ~ +85c m = -55 ~ +125c s = customer specified total frequency tolerance (ppm)
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