CX9VSM CRYSTAL
32 kHz to 250 kHz
Ultra-Miniature, Low Profile
Surface Mount Quartz Crystal
DESCRIPTION
Designed and manufactured in the USA, the CX9V quartz
crystal is available in frequencies from 32 kHz to 250 kHz.
Using micro-machining processes, this surface-mountable
crystal is hermetically sealed within a ultra-miniature ceramic
package to ensure high stability and low aging. Tight
calibration and custom laser tuning make the CX9V ideally
suited for all low frequency applications.
FEATURES
Glass Lid
Ceramic Lid
PACKAGE DIMENSIONS
Ultra-miniature, surface mount design (4.1mm x 1.5mm)
Low profile (typically 0.80mm)
Available with glass or ceramic lid
Hermetically sealed ceramic package
High shock and vibration survival
Excellent aging characteristics
Designed for low power applications
Full military testing available
Designed and manufactured in the USA
APPLICATIONS
A
TOP
BOTTOM
D
B
C
TYP.
DIM
A
B
C
D
inches
0.160
0.060
-
0.031
mm
4.10
1.50
-
0.79
inches
0.170
0.068
0.038
MAX.
mm
4.32
1.73
0.97
Medical
Pacemaker, defibrillator, and other implantables
Medical instruments
Industrial, Computer, & Communications
Smart card
Down hole instrumentation
Transponder / Animal migration
Process instrumentation
Military & Aerospace
Airborne hybrid
Navigational computer
Real time clock
EQUIVALENT CIRCUIT
see below
THICKNESS (DIM C) MAXIMUM
GLASS LID
MAX
SM1
SM2/SM4
SM3/SM5
inches
0.034
0.034
0.036
mm
0.87
0.87
0.91
CERAMIC LID
inches
0.035
0.035
0.037
mm
0.90
0.90
0.94
SUGGESTED LAND PATTERN
0.048 (1.22)
C
0
1
L
1
C
1
R
1
2
0.080
(2.03)
R
1
Motional Resistance L
1
Motional Inductance
C
1
Motional Capacitance C
0
Shunt Capacitance
inches (mm)
0.132 (3.35)
10157 - Rev D
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256
www.statek.com
SPECIFICATIONS
TYPICAL APPLICATION
FOR A PIERCE OSCILLATOR
Specifications are typical at 25
O
C unless otherwise noted.
Specifications are subject to change without notice.
Parameters
Fundamental
Overtone
Frequency, (kHz)
Motional Resistance R
1
(kΩ)
Motional Capacitance C
1
(fF)
Quality Factor Q (k)
Shunt Capacitance C
0
(pF)
Load Capacitance (pF)
1
Turning Point (
o
C)
32.768
60
2.2
37
1.0
9
20
100
19
1.0
80
0.85
9
16
180
5
2.0
90
1.0
9
20
240
4
1.5
110
0.9
9
25
The CX9 family of surface mount crystals are ideal for
small, high density, battery operated portable products. The
CX9 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
0
) is 50 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 CX9 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
Standard Calibration Tolerance for 32.768 kHz
2
Glass Lid:
Ceramic Lid:
Drive Level
30 ppm
(0.003%)
+
_
+
_
+
_
100 ppm
(0.01%)
1000 ppm
(0.1%)
+
_
1000 ppm
(0.1%)
10000 ppm
(1.0%)
100 ppm
(0.01%)
+
_
+
_
0.5
µW
MAX
Temperature Coefficient (k) -0.035 ppm/
O
C
2
Note: Frequency f at temperature T is related to frequency f
0
at
turning point temperature T
0
by: f-f
0
=
k(T-T )
2
0
f
0
Aging, first year
3 ppm
Shock, survival
3
Vibration, survival
Operating Temp. Range
5,000 g, 0.3 ms, 1/2 sine
20 g 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 C to +125 C
O
O
(1)
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
0
) is approximately equal to:
f
0
=
f
S
1
+
Where f
S
C
1
C
0
Storage Temp. Range
Max Process Temperature
1. Other values available
2. Tighter tolerances available
[
C
1
2(C
0
+ C
L
)
]
(2)
260
O
C for 20 sec.
3. Higher shock available
= Series resonant frequency of the crystal
= Motional Capacitance
= Shunt Capacitance
TERMINATIONS
Designation
SM1
SM2
SM3
SM4
SM5
Termination
Gold Plated (Lead Free)
Solder Plated
Solder Dipped
Solder Plated (Lead Free)
Solder Dipped (Lead Free)
O
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
R
f
BUFFER
OSC
Freq (f
O
)
Max Process Temperature 260 C for 20 sec.
HOW TO ORDER CX9VSM CRYSTALS
CX9V
S
C
C = Ceramic Lid
Blank = Glass Lid
“S” if special or
custom design.
Blank if Std.
SM1
32.768K
Frequency
K = kHz
,
100
/
AMPLIFIER
R
A
SM1 = Gold Plated (Lead Free)
SM2 = Solder Plated
SM3 = Solder Dipped
SM4 = Solder Plated (Lead Free)
SM5 = Solder Dipped (Lead Free)
Calibration
Tolerance
@ 25
O
C
(in ppm)
Operating Temp. Range:
C = -10
O
C to +70
O
C
I
= -40
O
C to +85
O
C
M = -55
O
C to +125
O
C
S = Customer Specified
I
C
G
CX9
C
D
PACKAGING OPTIONS
Tray Pack or 16mm tape, 7” or 13” reels
(Reference tape and reel data sheet 10109)
10157 - Rev D
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256
www.statek.com
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