SPECIFICATIONS
TERMINATIONS
Specifications are typical at 25oC unless otherwise noted.
Specifications are subject to change without notice.
49 MHz
Motional Resistance R
1
(k )
Motional Capacitance C
1
(fF)
Quality Factor Q (k)
Shunt Capacitance Co (pF)
Calibration Tolerance*
14
2.4
100
0.8
_
_
A
+
0.01% (
+
100ppm)
_
B
+
0.1%
_
C
+
1.0%
10pF (unless specified by customer)
Designation
SM1
SM2
SM3
Termination
Gold Plated
Nickel, Solder Plated
Nickel, Solder Plated and Solder Dipped
PACKAGING
CX-7-SM
-Tray Pack (Standard)
-16mm tape, 7” or 13” reels (Optional)
Per EIA 481 (see data sheet 10109)
Load Capacitance
Drive Level
Frequency-Temperature
Stability**
200 W MAX.
-10
O
C to +70
O
C from
-40
O
C to +85
O
C from
-55
O
C to +125
O
C from
5ppm MAX.
5,000g peak 0.3 msec., 1/2 sine
20g rms, 10-2,000 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
O
+
_
+
_
+
_
10ppm
35ppm
50ppm
EQUIVALENT CIRCUIT
C
0
1
L
1
C
1
R
1
2
Aging, first year
Shock, survival***
Vibration, survival
Operating Temperature
R
1
Motional Resistance L
1
Motional Inductance
C
1
Motional Capacitance C
0
Shunt Capacitance
Storage Temperature
Max Process Temperature 260 C for 20 sec.
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
R
f
Note: The characteristics of the frequency temperature stability
follow that of AT-Cut thickness-shear mode.
R
A
BUFFER
OSC
Freq (f
O
)
Contact factory for
design guidelines
_
* Tighter tolerances available as low as
+
5 ppm
** Does not include calibration tolerance
*** Higher shock version available
AMPLIFIER
C
S
C
G
CX-7
CX-1
C
D
HOW TO ORDER CX-7-SM CRYSTALS
CX-7
“S” if special or
custom design.
C=Ceramic Lid
Blank=Glass Lid
SM1
SM1
SM2
SM3
49 MHz
Frequency
(
50
*Calibration
Tolerance
@25
O
C
(A)
(B)
(C)
/
50
/
100
/
I
)
*Frequency
Total Frequency Temp. Range:
Stability over Tolerance
C = Commercial
Temp. Range
I = Industrial
M = Military
S = Specify
*Other calibration fill in ppm.
10155 - Rev A
RSG Electronic Components GmbH - Sprendlinger Landstr. 115 - 63069 Offenbach - Germany - www.rsg-electronic.de
RSG [ RSG ELECTRONIC COMPONENTS GMBH ]
