CX103 CRYSTAL 530 kHz to 2.1 MHz Miniature Quartz Crystal Fundamental AT-Cut Quartz Crystal DESCRIPTION The CX103 quartz crystal is a high quality miniature AT cut quartz resonator. The CX103 is hermetically sealed in a rugged, miniature ceramic package, one-fourth the size of an eight-pin mini-DIP. The CX103 crystal is manufactured using the STATEK-developed photolithographic process, and was designed utilizing the experience acquired by producing millions of crystals for industrial, commercial, military and medical applications. FEATURES PACKAGE DIMENSIONS Low-profile hermetically-sealed package F E Excellent aging characteristics High shock resistance Full military testing available D A Designed and manufactured in the USA PACKAGE HANDLING The CX crystal is hermetically sealed in a ceramic package. Normal handling and soldering precautions for small, low thermal mass parts are adequate when installing or testing CX crystals. CX crystals may be wave soldered, with proper precaution taken to avoid desoldering the leads. A slow machine rate or too high a pre-heat temperature or solder bath temperature can damage the crystals. Lead to package solder interface temperature should not exceed 175oC, glass lid to package seal rim temperature should not exceed 210oC. If the seal rim reaches temperatures above the maximum specified, the package may lose its hermeticity resulting in degradation of crystal performance. Mishandling of CX crystals can cause cracking of the glass lid and loss of hermeticity. B C TYP. MAX. DIM INCHES mm INCHES mm A 0.315 8.00 0.330 8.38 B 0.140 3.56 0.155 3.94 C 0.070 1.78 0.080 2.03 D 0.300 7.62 0.310 7.87 E 0.020 0.51 0.040 1.02 F 0.150 3.81 0.160 4.06 Leads 0.013” x 0.018” (0.33 x 0.46 mm) typical. EQUIVALENT CIRCUIT C0 1 L1 C1 R1 2 R1 Motional Resistance L1 Motional Inductance C1 Motional Capacitance C0 Shunt Capacitance 10130 - Rev E STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com SPECIFICATIONS Specifications are typical at 25OC unless otherwise noted. Specifications are subject to change without notice. Parameters Fundamental Overtone Frequency Range, (Hz) 555 k 614 k 1.0 M 1.4 M 1.8432 M 2.1M Motional Resistance,R1(Ω) 600 275 500 Motional Resistance,R1 MAX 775 300 475 3 kΩ Motional Capacitance,C1 (fF) 2.5 3.6 2.0 1.5 2.8 2.6 Quality Factor, Q (k) 170 260 190 100 110 70 Shunt Capacitance,C0 (pF) 1.2 1.3 1.1 1.0 1.3 1.3 Calibration Tolerance1 + _ 500 ppm (0.05%) + _ 1000 ppm (0.1%) + _ 10000 ppm (1.0%) 3 µW MAX Drive Level Load Capacitance2 7 pF 2 Turning Point (T0) 35OC Temperature Coefficient (k) -0.035 ppm/OC2 Note: Frequency f at temperature T is related to frequency f0 at f-f0 = k(T-T )2 turning point temperature T0 by: 0 f0 Function Mode Aging, first year Shock, survival Vibration, survival Operating Temp. Range Storage Temp. Range Max Process Temperature Extensional 5 ppm MAX 750 g, 0.3 ms, 1/2 sine 10 g RMS, 20-1,000 Hz random -10OC to +70OC (Commercial) -40OC to +85OC (Industrial) -55OC to +125OC (Military) -55OC to +125OC 260OC for 20 sec. TYPICAL APPLICATION FOR A PIERCE OSCILLATOR The low profile CX miniature leaded crystal is ideal for small, high density, battery operated portable products. The CX 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 PI-network circuit with CD and CG provides the additional phase shift necessary to sustain oscillation. The oscillation frequency (f0) is 15 to 150 ppm above the crystal’s series resonant frequency (fs). 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 CX crystal calibration tolerance is influenced by the effective circuit capacitances, specified as the load capacitance (CL). CL is approximately equal to: CL = CX1 “S” if special or custom design. Blank if Std. S C Blank = Glass Lid C = Ceramic Lid 03 — 1.0M, 03 05 (lead free) Frequency K = kHz M = MHz 500 / I Operating Temp. Range: C = -10OC to +70OC I = -40OC to +85OC M = -55OC to +125OC S = Customer Specified 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 + 1. Tighter tolerances available. 2. Other values available. HOW TO ORDER CX103 LEADED CRYSTAL CD x CG Where f S C1 C0 C1 2(C0 + CL) ] (2) = Series resonant frequency of the crystal = Motional Capacitance = Shunt Capacitance CONVENTIONAL CMOS PIERCE OSCILLATOR CIRCUIT Rf BUFFER Calibration Tolerance @ 25OC (in ppm) AMPLIFIER CS PACKAGING Tray Pack CG CX1 OSC Freq (fO) RA Contact factory for design guidelines CD 10130 - Rev E STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com