CX MINIATURE CRYSTALS CX-3V-SM EUROQUARTZ Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: [email protected] Web: www.euroquartz.co.uk Page 18kHz to 600kHz MINIATURE SMD CRYSTAL 1 of 2 ! ! ! ! ! ! ! General Description The miniature CX-3V-SM crystals are leadless devices designed for surface-mounting on printed circuit boards or hybrid substrates. These crystals are intended for use in Pierce oscillators. Hermetically sealed in a rugged, miniature ceramic package the crystals are produced using a photo-lithographic process giving repeatability and consistency. A D D B C Motional Capacitance (C1): Quality Factor (Q): E Outline Shunt Capacitance (C0): Drive Level: CX-3V-SM Package Dimensions Dimension Typical (mm) 6.73 B 2.62 2.90 C - see below D 1.27 1.52 E 1.32 1.57 Dimension “C” Glass Lid (mm max.) Turning Point (T0)**: Temperature Coefficient: Ageing, first year: Shock***: Vibration, survival: Operating Temperature: Maximum (mm) A 7.11 Storage Temperature: Max. Process Temperature: 1.47 1.75 SM2 1.52 1.80 SM3 1.60 1.88 18kHz to 600kHz Tuning Fork (Flexure) A, B, or C (see below) See Figure 1 Max: 18-25kHz, 2 x typ. 25-600kHz, 2.5 x typ. See Figure 2 See Figure 3 min. is 0.25 x typ. 1.8pF max. 18-25kHz 0.5µW max. 25-600kHz 1.0µW max. See Figure 4 -0.035ppm/°C ±5ppm max. 1,500g peak, 0.3ms, ½ sine 10g rms 20-2,000Hz random -10°~+70°C (commercial) -40°~+85°C (industrial) -55°~+125°C (military) -55°C~+125°C 260°C for 20 seconds Specifications are typical at 25°C unless otherwise indicated. Ceramic Lid (mm max.) SM1 Specification Frequency Range: Functional Mode: Calibration Tolerance*: Motional Resistance (R1): D (TOP) Miniature tuning fork design High shock resistance Designed for low power applications Compatible with hybrid or PCB mounting Low ageing Full military environmental testing available Ideal for battery operated applications * ** *** Closer frequency calibration available Other turning point available A higher shock and vibration version is available. CX-3V Crystal Calibration Tolerance at 25°C Equivalent Circuit 1 L1 Calibration C1 R1 C0 L 1 Motional Inductance C 1 Motional Capacitance C0 Shunt Capacitance R 1 Motional Resistance 2 Frequency Range (kHz) 18~74.9 75~169.9 170~249.9 250~600 A ±0.003% ±0.005% ±0.01% ±0.02% B ±0.01% ±0.01% ±0.02% ±0.05% C ±0.1% ±0.1% ±0.2% ±0.5% CX MINIATURE CRYSTALS CX-3V-SM EUROQUARTZ Telephone: +44(0)1460 230000 Fax: +44(0)1460 230001 Email: [email protected] Web: www.euroquartz.co.uk Page 18kHz to 600kHz MINIATURE SMD CRYSTAL 2 of 2 Figure 3 - CX-3V Typical Quality Factor (Q) 300 Circuit Design 200 100 Conventional HCMOS Pierce Oscillator Circuit in '000s 50 Rf Amplifier Buffer 20 18 RA CS C1 Osc. Freq. (Fo) 100 200 500 (kHz) Figure 4 - CX-3V Typical Turning Point Temp. (°C) C2 CX-2 50 Frequency +80 Figure 1 - CX-3V Typical Motional Resistance (R1) +70 +60 300 +50 200 +40 100 To(°C) +30 +20 50 R1 (k W) + 10 20 0 10 - 10 -20 10 5 20 50 100 200 600 Frequency (kHz) 2 18 50 100 200 600 Frequency (kHz) Figure 2 - CX-3V Typical Motional Capacitance (C1) Solder Pad Layout 5 1.78 C1 2 3.05 (fF) 1.0 5.46 Terminations 0.5 18 50 100 200 600 Frequency (kHz) Packaging Order Code CX-3V O.T.=3rd O.T. Mode Blank = Fundamental “S” if special C = Ceramic Lid or custom designBlank = Glass Lid Blank if standard Termination Designation CX-1-SM - Bulk Pack (Standard) - 16mm tape, 178mm or 330mm reels (Optional) per EIA 481 - Tray Pack (Optional) SM1 Gold Plated SM2 Nickel, Silver Plated SM3 Nickel, Solder Plated and Solder Dipped Frequency -SM1 32.768kHz ( A SM1 SM2 SM3 Calibration Tolerance* @ 25°C A, B, C *For other calibration tolerances enter figure in ppm / I ) Temperature Range: C = Commercial I = Industrial M = Military S = Specify