STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256
www.statek.com
DESCRIPTION
STATEK's ultra-miniature, low profile CX-7-SM AT-cut crystals
in leadless ceramic packages are designed for surface
mounting on printed circuit boards or hybrid circuits. These
crystals are low profile and have a very small land pattern.
Maximum process temperature should not exceed 260
O
C.
FEATURES
Designed for surface mount applications using infrared,
vapor phase, wave solder or epoxy mount techniques
Low profile (less than 1.2mm) hermeitcally sealed
ceraminc package
Excellent aging characteristics
Available with glass or ceramic lid
High shock and vibration resistance
Custom designs available
Full military testing available
Designed and manufactured in the USA
APPLICATIONS
Industrial, Computer & Communications
General purpose clock oscillator
PCMCIA
Fax, Modem and LAN
Smart card
PDA and notebook computers
Handheld instrumentation
Cellular
PCS
Military & Aerospace
Airborne hybrid computer
Military high speed modem
MCM
CX-7-SM CRYSTAL
20 MHz to 50 MHz
Ultra-Miniature, Low Profile
AT-Cut Surface Mount Crystal
10155 - Rev A
TM
TYP.
MAX.
DIM
INCHES
mm
INCHES
mm
A
.157
4.00
.162
4.11
B
.072
1.83
.085
2.16
C
-
-
see below
D
.035
0.89
.045
1.14
DIM "C"
GLASS LID
CERAMIC LID
MAX
INCHES
mm
INCHES
mm
SM1
.045
1.14
.050
1.27
SM2
.046
1.17
.051
1.30
SM3
.048
1.22
.053
1.35
TOP
BOTTOM
B
A
C
D
PACKAGE DIMENSIONS
actual size
SUGGESTED LAND PATTERN
.067[1.70]
.092
[2.34]
GRID COURTYARD
.055[1.40]
.121[3.07]
.177[4.50]
side view
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
10155 - Rev A
TERMINATIONS
Designation
Termination
SM1
Gold Plated
SM2
Nickel, Solder Plated
SM3
Nickel, Solder Plated and Solder Dipped
SPECIFICATIONS
Specifications are typical at 25oC unless otherwise noted.
Specifications are subject to change without notice.
49 MHz
Motional Resistance R
1
(k )
14
Motional Capacitance C
1
(fF)
2.4
Quality Factor Q (k)
100
Shunt Capacitance Co (pF)
0.8
Calibration Tolerance*
A 0.01% ( 100ppm)
B 0.1%
C 1.0%
Load Capacitance
10pF (unless specified by customer)
Drive Level
200 W MAX.
Frequency-Temperature
-10
O
C to +70
O
C from 10ppm
Stability**
-40
O
C to +85
O
C from 35ppm
-55
O
C to +125
O
C from 50ppm
Aging, first year
5ppm MAX.
Shock, survival***
5,000g peak 0.3 msec., 1/2 sine
Vibration, survival
20g rms, 10-2,000 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.
Note: The characteristics of the frequency temperature stability
follow that of AT-Cut thickness-shear mode.
+
_
+
_
+
_
+
_
+
_
+
_
+
_
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
CX-7
PACKAGING
CX-7-SM -Tray Pack (Standard)
-16mm tape, 7" or 13" reels (Optional)
Per EIA 481 (see data sheet 10109)
C
0
C
1
R
1
2
1
L
1
EQUIVALENT CIRCUIT
R
1
Motional Resistance L
1
Motional Inductance
C
1
Motional Capacitance C
0
Shunt Capacitance
* Tighter tolerances available as low as 5 ppm
** Does not include calibration tolerance
*** Higher shock version available
+
_
HOW TO ORDER CX-7-SM CRYSTALS
CX-7
SM1
49 MHz
(
50
/
50
/
100
/
I
)
C=Ceramic Lid
SM1
Frequency
*Calibration
*Frequency
Total Frequency Temp. Range:
Blank=Glass Lid
SM2
Tolerance
Stability over
Tolerance
C = Commercial
SM3
@25
O
C
Temp. Range
I = Industrial
(A)
M = Military
(B)
S = Specify
(C)
*Other calibration fill in ppm.
"S" if special or
custom design.
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