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CX-1-03 CRYSTAL
530 kHz to 2.1 MHz
TM
Miniature Quartz Crystal
DESCRIPTION
The CX-1 quartz crystal is a high quality extensional mode quartz resonator. The CX-1 is hermetically sealed in a rugged, miniature ceramic package, one-fourth the size of an eight-pin mini-DIP. The CX-1 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.
actual size
side view
FEATURES
PACKAGE DIMENSIONS
Extensional mode Ideal for use with microprocessors Designed for low power applications Compatible with hybrid or PC board packaging Low aging Full military testing available Ideal for battery operated applications Designed and manufactured in the USA
B A E
F
D
C
PACKAGE HANDLING
TYP. DIM A B C D E F INCHES .315 .140 .070 .300 .020 .150 mm 8.00 3.56 1.78 7.62 0.51 3.81 .330 .155 .080 .310 .040 .160
MAX. INCHES mm 8.38 3.94 2.03 7.87 1.02 4.06
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. Loss of hermeticity results in a frequency decrease and motional resistance increase.
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 B
RSG Electronic Components GmbH, Sprendlinger Landstr. 115, 63069 Offenbach, Germany, Tel. +49 69 - 984047-0, Fax: +49 69 - 9840-77, www.rsg-electronic.de
SPECIFICATIONS
Specifications are typical at 25oC unless otherwise noted. Specifications are subject to change without notice. Frequency Range Functional Mode Calibration Tolerance* 530 kHz - 2.1 MHz Extensional A B C 7 pF 3k 1.2fF 150 k 1.0 pF 3 W MAX. 35oC MAX
+ _ _ 0.05% ( + 500ppm) 0.1% + _ 1.0% + _
TYPICAL APPLICATION FOR A PIERCE OSCILLATOR
Load Capacitance Motional Resistance (R1) Motional Capacitance (C1) Quality Factor (Q) Shunt Capacitance (C0) Drive Level Turning Point (TO)**
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 (fO) 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 = CD x CG CD + CG
+ CS
Temperature Coefficient (k) -0.035 ppm/oC2 Note: Frequency (f) deviation from frequency (fO) @ turning point temperature (TO); f-fO = k(T-T )2 O fO Aging, first year 5ppm MAX. Shock Vibration, survival Operating Temperature 750g peak, 0.3 msec., 1/2 sine 10g rms, 20-1,000 Hz random -10oC to +70oC Commercial -40oC to +85oC Industrial -55oC to +125oC Military -55oC to +125oC See package handling
(1)
Storage Temperature Max Process Temperature
* Tighter frequency calibration available. ** Other turning point available.
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 (fO) is approximately equal to: fO = fS 1 + Where f S C1 C0
[
C1 2(C0 + CL)
]
(2)
HOW TO ORDER CX-1-03 LEADED CRYSTALS
= Series resonant frequency of the crystal = Motional Capacitance = Shunt Capacitance
CX-1 "S" if special or custom design. Blank if Std. Blank=Glass Lid C=Ceramic Lid
-03 Side Leads
1.0 MHz
(A
/I) Temp. Range: = Commercial = Industrial = Military = Specify
*Other calibration fill in ppm.
Calibration Tolerance* @ 250C Frequency (A) (B) (C)
C I M S
CONVENTIONAL CMOS PIERCE OSCILLATOR CIRCUIT
Rf BUFFER OSC Freq (fO)
Contact factory for design guidelines
PACKAGING
CX-1V-03 -Tray Pack (Standard)
CG
AMPLIFIER CS
RA
CX-1
CD
10130 - Rev B
RSG Electronic Components GmbH, Sprendlinger Landstr. 115, 63069 Offenbach, Germany, Tel. +49 69 - 984047-0, Fax: +49 69 - 9840-77, www.rsg-electronic.de

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