CX103 STATEK | Alldatasheet
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Technical content
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
Low-profile hermetically-sealed package Excellent aging characteristics High shock resistance Full military testing available 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. CX103 CRYSTAL 530 kHz to 2.1 MHz Miniature Quartz Crystal Fundamental AT-Cut Quartz Crystal 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 10130 - Rev E C1 R1 21 L1 A B E C D F EQUIVALENT CIRCUIT R1 Motional Resistance L1 Motional Inductance C1 Motional Capacitance C0 Shunt Capacitance PACKAGE DIMENSIONS STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
HOW TO ORDER CX103 LEADED CRYSTAL CX1 S C 03 — 1.0M, 500 / I STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com 10130 - Rev E PACKAGING Tray Pack 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: 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: CL = CD x CG +CSCD + CG (1) f0 = fS [1+ C1 ]2(C0 + CL) (2) Where fS = Series resonant frequency of the crystal C1 = Motional Capacitance C0 = Shunt Capacitance AMPLIFIER BUFFER CG CD RA CX1 Contact factory for design guidelines OSC Freq (f )O Rf CS CONVENTIONAL CMOS PIERCE OSCILLATOR CIRCUIT“S” if special or custom design. Blank if Std. Blank = Glass Lid C = Ceramic Lid Frequency K = kHz M = MHz Calibration Tolerance @ 25OC (in ppm) Operating Temp. Range: C = -10OC to +70OC I = -40OC to +85OC M = -55OC to +125OC S = Customer Specified 05 - (lead free) 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) 600 275 500 775 300 475 Motional Resistance,R1 MAX 3 kΩ Quality Factor, Q (k) 170 260 190 100 110 70 Calibration Tolerance1 500 ppm (0.05%) 1000 ppm (0.1%) 10000 ppm (1.0%) Drive Level 3 µW MAX Load Capacitance2 7 pF Turning Point (T0)2 35OC Temperature Coefficient (k) -0.035 ppm/OC2 Note: Frequency f at temperature T is related to frequency f0 at turning point temperature T0 by: Function Mode Extensional Aging, first year 5 ppm MAX Shock, survival 750 g, 0.3 ms, 1/2 sine Vibration, survival 10 g RMS, 20-1,000 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. Tighter tolerances available. 2. Other values available. f-f0 = k(T-T0)