CX4VSM CRYSTAL 30 kHz to 250 kHz Ultra-Miniature Low Profile Surface Mount Quartz Crystal DESCRIPTION STATEK’s ultra-miniature CX4VSM quartz crystals are hermetically sealed in surface mount ceramic packages and custom laser-tuned to frequencies ranging from 30 kHz to 250 kHz. This high quality tuning fork resonator is intended for use in Pierce (single inverter) oscillators with a maximum process temperature not to exceed 260OC. Glass Lid Shown PACKAGE DIMENSIONS D FEATURES Ultra-miniature, surface mount design Available with glass or ceramic lid TOP A Hermetically sealed ceramic package BOTTOM F Quartz crystal tuning fork design High shock and vibration survival Excellent aging characteristics B Designed for low power applications Full military testing available E D C TYP. MAX. DIM inches mm inches mm A 0.197 5.00 0.210 5.33 B 0.072 1.83 0.085 2.16 Medical Implantable and Non-Implantable Devices C - - D 0.036 0.91 0.046 1.16 Military Devices E 0.020 0.51 - - Smart Card F 0.025 0.64 - - Designed and manufactured in the USA APPLICATIONS Transponder / Animal Migration see below THICKNESS (DIM C) Space Limited Devices Lid Handheld Battery Operated Devices Ceramic Down Hole / Industrial Instrumentation Glass Computer / Computer Peripherals Termination inches Maximum mm SM1 0.050 1.27 SM2/SM4 0.051 1.30 SM3/SM5 0.053 1.35 SM1 0.045 1.14 SM2/SM4 0.046 1.17 SM3/SM5 0.048 1.22 SUGGESTED LAND PATTERN EQUIVALENT CIRCUIT 0.059 (1.5) C0 1 L1 C1 R1 R1 Motional Resistance L1 Motional Inductance C1 Motional Capacitance C0 Shunt Capacitance 0.092 (2.3) 2 0.160 (4.0) inches (mm) STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com 10103 - Rev E TYPICAL APPLICATION FOR A PIERCE OSCILLATOR SPECIFICATIONS Specifications are typical at 25OC unless otherwise noted. Specifications are subject to change without notice. Parameters Fundamental Overtone 32.768 100 200 Motional Resistance R1(kΩ) Frequency, (kHz) 50 18 2.4 Motional Capacitance C1 (fF) 2.3 1.07 2.2 Quality Factor Q (k) 40 85 140 Shunt Capacitance C0 (pF) 1.1 0.7 1.2 Load Capacitance (pF)1 9 8 5 Turning Point ( C) 25 10 29 o 1 Standard Calibration Tolerance for 32.768 kHz2 Glass Lid: + _ 30 ppm (0.003%) + _ Ceramic Lid: + _ + _ 100 ppm (0.01%) Drive Level 100 ppm (0.01%) + _ 1000 ppm (0.1%) 1000 ppm (0.1%) + _ 10000 ppm (1.0%) 0.5 µW MAX Temperature Coefficient (k) -0.035 ppm/OC2 Note: Frequency f at temperature T is related to frequency f0 at turning point temperature T0 by: f-f0 2 = k(T-T0) f0 Aging, first year 3 ppm Shock, survival3 5,000 g, 0.3 ms, 1/2 sine Vibration, survival 20 g RMS, 10-2,000 Hz random Operating Temp. Range -10OC to +70OC (Commercial) -40OC to +85OC (Industrial) -55OC to +125OC (Military) Storage Temp. Range -55OC to +125OC Max Process Temperature 260OC for 20 sec. 1. Other values available 2. Tighter tolerances available Drive Level RA is used to limit the crystal’s drive level by forming a voltage divider between RA and CD. RA also stabilizes the oscillator against changes in the amplifiers output resistance (R0). RA should be increased for higher voltage operation. Load Capacitance The CX4 crystal calibration tolerance is influenced by the effective circuit capacitances, specified as the load capacitance (CL). CL is approximately equal to: CL = 3. Higher shock available Termination Gold Plated Solder Plated Solder Dipped Solder Plated (Pb Free) Solder Dipped (Pb Free) CD x CG CD + CG (1) + CS NOTE: CD and CG include stray layout to ground and CS is the stray shunt capacitance between the crystal terminal. In practice, the effective value of CL will be less than that calculated from CD, CG and CS values because of the effect of the amplifier output resistance. CS should be minimized. The oscillation frequency (f0) is approximately equal to: [ f0 = fS 1 + Where f S C1 C0 TERMINATIONS Designation SM1 SM2 SM3 SM4 SM5 The CX4 family of surface mount crystals are ideal for small, high density, battery operated portable products. The CX4 crystal designed in a Pierce oscillator (single inverter) circuit provides very low current consumption and high stability. A conventional CMOS Pierce oscillator circuit is shown below. The crystal is effectively inductive and in a PInetwork circuit with CD and CG provides the additional phase shift necessary to sustain oscillation. The oscillation frequency (f0) is 50 to 150 ppm above the crystal’s series resonant frequency (fS). C1 2(C0 + CL) (2) = Series resonant frequency of the crystal = Motional Capacitance = Shunt Capacitance CONVENTIONAL CMOS PIERCE OSCILLATOR CIRCUIT Rf BUFFER PACKAGING OPTIONS CX4VSM ] - Tray Pack - 16mm tape, 7” or 13” reels AMPLIFIER RA OSC Freq (fO ) (Reference tape and reel data sheet 10109) HOW TO ORDER CX4VSM CRYSTALS CX4V S C C = Ceramic Lid Blank = Glass Lid “S” if special or custom design. Blank if standard SM1 32.768K , 100 Frequency K = kHz SM1 = Gold Plated (Pb Free) SM2 = Solder Plated SM3 = Solder Dipped SM4 = Solder Plated (Pb Free) SM5 = Solder Dipped (Pb Free) Calibration Tolerance @25OC (in ppm) / I Operating Temp. Range: C = -10OC to +70OC I = -40OC to +85OC M = -55OC to +125OC S = Customer Specified CG CX4 XTAL CD STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com 10103 - Rev E