CX-1-03 CRYSTAL
530 kHz to 2.1 MHz
™
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 175
o
C,
glass lid to package seal rim temperature should not
exceed 210
o
C.
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
C
0
1
L
1
C
1
R
1
2
R
1
Motional Resistance L
1
Motional Inductance
C
1
Motional Capacitance C
0
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.
35
o
C
o
2
TYPICAL APPLICATION
FOR A PIERCE OSCILLATOR
+
_
_
0.05% (
+
500ppm)
+
_
0.1%
+
_
1.0%
Load Capacitance
Motional Resistance (R
1
)
Motional Capacitance (C
1
)
Quality Factor (Q)
Shunt Capacitance (C
0
)
Drive Level
Turning Point (T
O
)**
MAX
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 C
D
and C
G
provides the additional phase shift
necessary to sustain oscillation. The oscillation frequency
(f
O
) is 15 to 150 ppm above the crystal’s series resonant
frequency (f
s
).
Drive Level
R
A
is used to limit the crystal’s drive level by forming a
voltage divider between R
A
and C
D
. R
A
also stabilizes the
oscillator against changes in the amplifiers output
resistance (R
0
). R
A
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 (C
L
). C
L
is approximately equal to:
C
L =
C
D
x C
G
C
D
+ C
G
+
C
S
Temperature Coefficient (k) -0.035 ppm/ C
Note: Frequency (f) deviation from frequency (f
O
) @ turning
point temperature (T
O
);
f-f
O =
k(T-T )
2
O
f
O
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
-10
o
C to +70
o
C Commercial
-40
o
C to +85
o
C Industrial
-55
o
C to +125
o
C Military
-55
o
C to +125
o
C
See package handling
(1)
Storage Temperature
Max Process Temperature
* Tighter frequency calibration available.
** Other turning point available.
NOTE: C
D
and C
G
include stray layout to ground and C
s
is the stray shunt capacitance between the crystal
terminal. In practice, the effective value of C
L
will be less
than that calculated from C
D
, C
G
and C
S
values because
of the effect of the amplifier output resistance. C
S
should
be minimized.
The oscillation frequency (f
O
) is approximately equal to:
f
O =
f
S
1
+
Where f
S
C
1
C
0
[
C
1
2(C
0
+ C
L
)
]
(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 )
*Other calibration fill in ppm.
Calibration
Tolerance*
@ 25
0
C
Frequency
(A)
(B)
(C)
Temp. Range:
C = Commercial
I = Industrial
M = Military
S = Specify
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
R
f
BUFFER
OSC
Freq (f
O
)
Contact factory for
design guidelines
PACKAGING
CX-1V-03 -Tray Pack (Standard)
C
G
AMPLIFIER
C
S
R
A
CX-1
C
D
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
Microcontroller MCU
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