CX MINIATURE CRYSTALS CX-1-SM EUROQUARTZ Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: [email protected] Web: www.euroquartz.co.uk Page 8MHz to 160MHz MINIATURE AT-CUT SMD CRYSTAL 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 Frequency Range: Calibration Tolerance*: D (TO P) A Load Capacitance: Motional Resistance (R1): Motional Capacitance (C1): Quality Factor (Q): Shunt Capacitance (C0): Drive Level: Temperature Stability**: E D B C E Outline CX-1-SM Package Dimensions Dimension Typical Maximum (mm) (mm) A 8.00 8.38 B 3.56 3.94 C - see below D 1.14 1.40 E 1.52 1.78 Dimension Glass Lid Ceramic Lid C (mm max.) (mm max.) SM1 1.65 1.78 SM2 1.70 1.83 SM3 1.78 1.90 Ageing, first year: Shock, survival***: Vibration, survival: Operating Temperature: Storage Temperature: Process Temperature: 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 CX-1 Motional Parameters, Q and C0 Equivalent Circuit Frequency 1 L1 C1 R1 C0 R 1 Motional Resistance 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 L 1 Motional Inductance C 1 Motional Capacitance C0 Shunt Capacitance 2 Motional Motional Quality Shunt Resistance Capacitance Factor Capacitance C1 (fF) 000s C0 (pF) 80 2.2 R1 ( 10.0MHz W) 50 5.5 32MHz 20 7.8 36 2.6 155MHz 50 0.5 41 3.2 CX MINIATURE CRYSTALS CX-1-SM EUROQUARTZ Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: [email protected] Web: www.euroquartz.co.uk Page 8MHz to 160MHz MINIATURE AT-CUT SMD CRYSTAL 2 of 2 Terminations Circuit Design Typical HCMOS Pierce Oscillator Designation 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. Termination SM1 Gold Plated SM2 Nickel, Silver Plated SM3 Nickel, Solder Plated and Solder Dipped Packaging Conventional HCMOS Pierce Oscillator Circuit Rf Amplifier CS C1 CX-1-SM - Bulk Pack (Standard) - 16mm tape, 178mm or 330mm reels (Optional) per EIA 481 - Tray Pack (Optional) Buffer Osc. Freq. (Fo) RA Suggested Solder Pad Layout C2 CX-1 1.78 4.06 6.86 Order Code CX-1 O.T.=3rd O.T. Mode Blank = Fundamental “S” if special or custom design Blank if standard Total Frequency Tolerance Frequency SM1 SM1 SM2 SM3 C = Ceramic Lid Blank = Glass Lid 32MHz ( A Calibration Tolerance* @ 25°C A, B, C / 25ppm / 50ppm / I Frequency Stability over Temperature Range *For other calibration tolerances enter figure in ppm ) Temperature Range: C = Commercial I = Industrial M = Military S = Specify