STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
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.
FEATURES
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
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 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.
CX-1-03 CRYSTAL
530 kHz to 2.1 MHz
Miniature Quartz Crystal
TM
TYP.
MAX.
DIM
INCHES
mm
INCHES
mm
A
.315
8.00
.330
8.38
B
.140
3.56
.155
3.94
C
.070
1.78
.080
2.03
D
.300
7.62
.310
7.87
E
.020
0.51
.040
1.02
F
.150
3.81
.160
4.06
Leads 0.013" x 0.018" (0.33 x 0.46 mm) typical.
10130 - Rev B
C
0
C
1
R
1
2
1
L
1
A
B
E
C
D
F
actual size
side view
EQUIVALENT CIRCUIT
R
1
Motional Resistance L
1
Motional Inductance
C
1
Motional Capacitance C
0
Shunt Capacitance
PACKAGE DIMENSIONS
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
10130 - Rev B
SPECIFICATIONS
Specifications are typical at 25oC unless otherwise noted.
Specifications are subject to change without notice.
Frequency Range
530 kHz - 2.1 MHz
Functional Mode
Extensional
Calibration Tolerance*
A
0.05% ( 500ppm)
B
0.1%
C 1.0%
Load Capacitance
7 pF
Motional Resistance (R
1
)
3 k
MAX
Motional Capacitance (C
1
)
1.2fF
Quality Factor (Q)
150 k
Shunt Capacitance (C
0
)
1.0 pF
Drive Level
3 W MAX.
Turning Point (T
O
)**
35
o
C
Temperature Coefficient (k) -0.035 ppm/
o
C
2
Note: Frequency (f) deviation from frequency (f
O
) @ turning
point temperature (T
O
);
Aging, first year
5ppm MAX.
Shock
750g peak, 0.3 msec., 1/2 sine
Vibration, survival
10g rms, 20-1,000 Hz random
Operating Temperature
-10
o
C to +70
o
C
Commercial
-40
o
C to +85
o
C Industrial
-55
o
C to +125
o
C Military
Storage Temperature
-55
o
C to +125
o
C
Max Process Temperature
See package handling
* Tighter frequency calibration available.
** Other turning point available.
+
_
+
_
+
_
+
_
HOW TO ORDER CX-1-03 LEADED CRYSTALS
CX-1
-03
1.0 MHz
( A / I )
"S" if special
Blank=Glass Lid
Side
Calibration
Temp. Range:
or custom
C=Ceramic Lid
Leads
Tolerance*
C = Commercial
design. Blank
@ 25
0
C
I
= Industrial
if Std.
(A)
M = Military
(B)
S = Specify
(C)
*Other calibration fill in ppm.
PACKAGING
CX-1V-03 -Tray Pack (Standard)
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 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:
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:
C
L
=
C
D
x C
G
+
C
S
C
D
+ C
G
f-f
O =
k(T-T
O
)
2
(1)
f
O
=
f
S
[
1
+
C
1
]
2(C
0
+ C
L
)
(2)
Where f
S
= Series resonant frequency of the crystal
C
1
= Motional Capacitance
C
0
= Shunt Capacitance
f
O
Frequency
AMPLIFIER
BUFFER
C
G
C
D
R
A
CX-1
Contact factory for
design guidelines
OSC
Freq (f )
O
R
f
C
S
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
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