EURO QUARTZ SWCX1 SWEPT QUARTZ CRYSTALS Radiation-Resistant Miniature Crystals 8MHz to 250MHz Page 1 of 2 FEATURES 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 DESCRIPTION ELECTRICAL SPECIFICATION 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. APPLICATIONS · · · · · Military and aerospace Satellite Space exploration systems Deep space probes Telemetry 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) PACKAGE DIMENSIONS A B C (max.) D E F OUTLINES SWCX1 Surface-mount (mm) 8.00 3.56 1.78 1.14 1.52 - Package Style: Frequency Range: Motional Resistance (R1) @ 25°C at 32MHz: at 155.2MHz: Motional Capacitance (C1) @ 25°C at 32MHz: at 155.2MHz: Shunt Capacitance (C0) @25°C: Quality Factor (Q) @ 25°C: Load Capacitance (CL) <50MHz: >50MHz: Drive Level <50MHz: >50MHz: SWCX1 (SM) SWCX1 (03) 8.0MHz to 250.0MHz 25Ω 15Ω 6.2fF 1.0fF 2.3pF 30k 20pF 10pF 500µW maximum 200µW maximum GENERAL SPECIFICATION PACKAGING OPTIONS Dim. Specifications are typical unless otherwise noted. SWCX1 Leaded (03) (mm) 8.00 3.56 1.78 7.87 1.02 3.81 Specifications are typical unless otherwise noted. Calibration Tolerance @ 25°C: Temperature Stability: Ageing First Year: Shock Survival*: Vibration Survival: ±100ppm or tighter, as required Refer to CX1 AT datasheet ±2ppm maximum. 3,000g peak 0.3ms, ½ sine 20g, 10~2,000Hz swept sine TERMINATIONS - PLATING Designation SM1 SM2 SM3 / 03 Termination Gold Plated Solder Plated Solder Dipped EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk EURO QUARTZ SWCX1 SWEPT QUARTZ CRYSTALS Radiation-Resistant Miniature Crystals 8MHz to 250MHz Page 2 of 2 STANDARD TESTS AND SCREENING OPTIONS Code Item S M E X X X X X Method Comments Made with swept quartz Internal visual (pre-seal) Company internal standard X PIND testing MIL-STD-883 Method 2020 Cond. A X Radiographic inspection MIL-STD-202 Method 209 Performed in both width and thickness directions X X Unwanted modes MIL-PRF-3098 Spurious mode ratio 2:1 or greater X X Low temperature storage MIL-PRF-3098 X X Frequency and resistance over operating temperature range MIL-PRF-3098 X X X Accelerated ageing 105 degree C for a minimum of 160 hours Resistance must meet specification at this low temperature. Measure every 2.5 degree C or tighter over operating temperature range; frequency and resistance must meet specification. 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 Notes: S: for space-based applications. M: for military appl.ications (MIL-PRF-3098) E: For engineering prototypes and applications not requiring additional screening. HOW TO ORDER SWCX1 SWEPT CRYSTALS SWCX1 - S Swept Quartz Crystal - Screening per option code: S = Space M = Military E = Engineering S - C 'S' for 'C' = special or Ceramic custom Lid design - SM1 - 20.0M , 100 Leaded 03 Surface Mount SM1 SM2 SM3 Frequency M = MHz Calibration Tolerance @25°C (in ppm)* / 100 / – Frequency Stability over temperature (in ppm)* / I Temp. Range C = -10° ~ +70°C I = -40° ~ +85°C M = -55° ~ +125°C S = Customer specified Or: - / - / 200 / Total frequency tolerance (ppm) I Temp. Range C = -10° ~ +70°C I = -40° ~ +85°C M = -55° ~ +125°C S = Customer specified EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk