CX-1SM232A

CX MINIATURE CRYSTALS 8MHz to 160MHz MINIATURE AT-CUT SMD CRYSTAL EURO QUARTZ Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk Web: www.euroquartz.co.uk CX-1-SM CX-1-SM Page 1 of 2  General Description The miniature CX-1-SM crystals in leadless ceramic packages have been designed for surface-mounting on printed circuit boards or hybrid circuits. It is a robust crystal that has gained widespread acceptance in the industry.      Surface-mount - infrared, vapour phase, wave solder or epoxy mount techniques Low profile, hermetically sealed package Available with glass or ceramic lid High shock and vibration resistance Custom designs available Full military environmental testing available Specification D (TO P) Frequency Range: Calibration Tolerance*: Load Capacitance: Motional Resistance (R): Motional Capacitance (C): Quality Factor (Q): Shunt Capacitance (C): Drive Level: Temperature Stability**: Ageing, first year: Shock, survival***: Vibration, survival: Operating Temperature: Storage Temperature: Process Temperature: A E D B C E Outline CX-1-SM Package Dimensions Dimension Typical (mm) Maximum (mm) A B C D E Dimension “C” 8.00 3.56 1.14 1.52 Glass Lid (mm max.) 8.38 3.94 see below 1.40 1.78 Ceramic Lid (mm max.) 8MHz to 160MHz A ±0.01% (±100ppm) B ±0.1% C ±1.0% 20pF (unless other required) See table See table See table See table 500mW max. -10° to +70°C from ±10ppm -40° to +85°C from ±20ppm -55° to +125°C from ±30ppm ±5ppm max. 3000g 0.3ms, ½ sine 20g rms 10-2,000Hz random -10°~+70°C (commercial) -40°~+85°C (industrial) -55°~+125°C (military) -55°C~+125°C 260°C for 20 seconds SM1 SM2 SM3 1.65 1.70 1.78 1.78 1.83 1.90 Specifications are typical at 25°C unless otherwise indicated. The characteristics of the frequency stability parameter follow that of AT-cut, thickness-shear mode crystals. * Closer calibration available, as low as ±5ppm ** Does not include calibration tolerance ** A higher shock version is available, refer to data sheet for the model CX-1HG Equivalent Circuit L R CX-1 Motional Parameters, Q and C Motional Frequency Resistance R ( Motional Capacitance C (fF) Quality Factor ‘000s Shunt Capacitance C (pF) 1 C C 2 9) 10.0MHz 32MHz 155MHz 50 20 50 5.5 7.8 0.5 80 36 41 2.2 2.6 3.2 R  Motional Resistance L  Motional Inductance C  Motional Capacitance C Shunt Capacitance CX MINIATURE CRYSTALS 8MHz to 160MHz MINIATURE AT-CUT SMD CRYSTAL EURO QUARTZ Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: sales@euroquartz.co.uk Web: www.euroquartz.co.uk CX-1-SM Page 2 of 2 Circuit Design Typical HCMOS Pierce Oscillator A conventional HCMOS Pierce oscillator is shown below. The crystal oscillates at a frequency fO above the crystal’s seriesresonant frequency. The crystal is effectively inductive and in combination with RF, C1 and C2 in the feedback loop, provides approximately 180° of the phase shift necessary to ensure oscillation. Designation Termination Terminations SM1 SM2 SM3 Gold Plated Nickel, Silver Plated Nickel, Solder Plated and Solder Dipped Packaging Conventional HCMOS Pierce Oscillator Circuit RB Amplifier CX-1-SM - Bulk Pack (Standard) - 16mm tape, 178mm or 330mm reels (Optional) per EIA 481 - Tray Pack (Optional) Buffer Osc. Freq. (Fo) C5 R) C CX-1 C Suggested Solder Pad Layout 1.78 4.06 6.86 Order Code CX-1 O.T.=3rd O.T. Mode Blank = Fundamental Frequency Total Frequency Tolerance SM1 SM1 SM2 SM3 32MHz (A Calibration Tolerance* @ 25°C A, B, C / 25ppm / 50ppm / I Frequency Stability over Temperature Range ) “S” if special or custom design Blank if standard C = Ceramic Lid Blank = Glass Lid *For other calibration tolerances enter figure in ppm Temperature Range: C = Commercial I = Industrial M = Military S = Specify