CX-3V-SM CRYSTAL
18 kHz to 600 kHz
TM
Miniature Surface Mount
Quartz Crystal for Pierce Oscillators
DESCRIPTION
actual size
The CX-3V-SM quartz crystals are leadless devices
designed for surface mounting on printed circuit boards
or hybrid substrates. These miniature crystals are
intended to be used in Pierce oscillators. They are
hermetically sealed in a rugged, miniature ceramic
package. They are manufactured using the STATEK-
developed photolithographic process, and were
designed utilizing the experience acquired by producing
millions of crystals for industrial, commercial, military and
medical applications. Maximum process temperature
should not exceed 260
O
C.
FEATURES
side view
PACKAGE DIMENSIONS
D
A
TOP
D
BOTTOM
D
B
C
E
Miniature tuning fork design
High shock resistance
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
EQUIVALENT CIRCUIT
TYP.
DIM
A
B
C
D
E
DIM “C“”
MAX
SM1
SM2
SM3
INCHES
.265
.103
-
.050
.052
mm
6.73
2.62
-
1.27
1.32
.280
.114
.060
.062
MAX.
INCHES
mm
7.11
2.90
1.52
1.57
see below
GLASS LID
INCHES
.058
.060
.063
mm
1.47
1.52
1.60
CERAMIC LID
INCHES
.069
.071
.074
mm
1.75
1.80
1.88
C
0
1
L
1
C
1
R
1
2
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
R
1
Motional Resistance L
1
Motional Inductance
C
1
Motional Capacitance C
0
Shunt Capacitance
SUGGESTED LAND PATTERN
.070[1.78]
R
f
BUFFER
OSC
Freq (f
O
)
Contact factory for
design guidelines
.120[3.05]
AMPLIFIER
C
S
R
A
C
G
INCHES[mm]
.215[5.46]
CX-1
CX-3
C
D
10104 - Rev A
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
SPECIFICATIONS
FIGURE 1
CX-3V TYPICAL MOTIONAL RESISTANCE (R
1
)
Specifications are typical at 25
O
C unless otherwise noted.
Specifications are subject to change without notice.
Frequency Range
18 kHz to 600 kHz
Functional Mode
Tuning Fork (Flexure)
Calibration Tolerance*
A, B or C
(see below)
Motional Resistance (R
1
)
See Figure 1
MAX.: 18-25 kHz, 2x Typ.
25-600 kHz, 2.5x Typ.
Motional Capacitance (C
1
) Figure 2
Quality Factor (Q)
Figure 3
Min. is 0.25x Typ.
Shunt Capacitance (C
0
)
1.8 pF MAX.
Drive Level
18-25 kHz 0.5 W MAX.
25-600 kHz 1.0 W MAX.
Turning Point (To )**
Figure 4
Temperature Coefficient (k) -0.035 ppm/
0
C
2
Aging, first year
5ppm MAX.
Shock***
1,500g peak, 0.3 msec., 1/2 sine
Vibration, survival***
10g rms, 20-2,000 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 260
O
C for 20 sec.
* Tighter frequency calibration available.
** Other turning point available.
*** Higher shock and vibration available.
300
200
100
50
R
1
(k )
20
10
5
2
18
50
100
200
600
Frequency (kHz)
FIGURE 2
CX-3V TYPICAL MOTIONAL CAPACITANCE (C
1
)
5
C
1
(fF)
2
1.0
0.5
18
50
100
200
600
Frequency (kHz)
FIGURE 3
CX-3V TYPICAL QUALITY FACTOR (Q)
300
200
(in 1000's)
100
50
CX-3V Crystal Calibration T
olerance at 25
O
C
20
18
50
100
200
600
Frequency Range (kHz)
Calibration 18-74.9
A
B
C
+
_
+
_
+
_
Frequency (kHz)
75-169.9
+
_
+
_
+
_
170-249.9
+
_
+
_
+
_
250-600
+
_
+
_
FIGURE 4
CX-3V TYPICAL TURNING POINT TEMP (T
0
)
.
0.003%
0.01%
0.1%
0.005%
0.01%
0.1%
0.01%
0.02%
0.2%
0.02%
0.05%
*** Other calibration values available, consult factory.
Load Capacitance (C
L
), Used to Calibrate CX-3V
(other C
L
available)
T
O
( C)
+
_
O
0.5%
+80
+70
+60
+50
+40
+30
+20
+10
0
-10
-20
18
50
100
200
600
Frequency Load
Range
Capacitance
(kHz)
(pF)
18-24.9
25-54.9
55-100.0
10
9
8
Frequency
Range
(kHz)
100.1-179.9
180-600
Load
Capacitance
(pF)
5
4
Frequency (kHz)
Note: Frequency (f) deviation from frequency (fo) @ turning point
2
f-f
O
= k(T-T )
O
f
O
TERMINATIONS
HOW TO ORDER CX-3V-SM CRYSTALS
CX-3V
“S” if special
or custom
design.
Blank if Std.
-SM1
32.768 kHz
(
A
/
I
)
Designation
SM1
SM2
SM3
Termination
Gold Plated
Nickel, Solder Plated
Nickel, Solder Plated and Solder Dipped
SM1 Frequency
SM2
SM3
Blank = Glass Lid
C=Ceramic Lid
Calibration
Tolerance*
@ 25
0
C
(A)
(B)
(C)
Temp. Range:
C = Commercial
I = Industrial
M = Military
S = Specify
PACKAGING
CX-3V-SM - Tray Pack (Standard)
-16mm tape, 7” or 13” reels (Optional)
Per EIA 481 (see data sheet 10109)
10104 - Rev A
*Other calibration fill in ppm.
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
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