STATEK CX4VSM Ultra-miniature low profile surface mount quartz crystal Datasheet

CX4VSM CRYSTAL
30 kHz to 250 kHz
Ultra-Miniature Low Profile
Surface Mount Quartz Crystal
DESCRIPTION
STATEK’s ultra-miniature CX4VSM quartz crystals are
hermetically sealed in surface mount ceramic packages and
custom laser-tuned to frequencies ranging from 30 kHz to
250 kHz. This high quality tuning fork resonator is intended
for use in Pierce (single inverter) oscillators with a maximum
process temperature not to exceed 260OC.
Glass Lid Shown
PACKAGE DIMENSIONS
D
FEATURES
Ultra-miniature, surface mount design
Available with glass or ceramic lid
TOP
A
Hermetically sealed ceramic package
BOTTOM
F
Quartz crystal tuning fork design
High shock and vibration survival
Excellent aging characteristics
B
Designed for low power applications
Full military testing available
E
D
C
TYP.
MAX.
DIM
inches
mm
inches
mm
A
0.197
5.00
0.210
5.33
B
0.072
1.83
0.085
2.16
Medical Implantable and Non-Implantable Devices
C
-
-
D
0.036
0.91
0.046
1.16
Military Devices
E
0.020
0.51
-
-
Smart Card
F
0.025
0.64
-
-
Designed and manufactured in the USA
APPLICATIONS
Transponder / Animal Migration
see below
THICKNESS (DIM C)
Space Limited Devices
Lid
Handheld Battery Operated Devices
Ceramic
Down Hole / Industrial Instrumentation
Glass
Computer / Computer Peripherals
Termination
inches
Maximum
mm
SM1
0.050
1.27
SM2/SM4
0.051
1.30
SM3/SM5
0.053
1.35
SM1
0.045
1.14
SM2/SM4
0.046
1.17
SM3/SM5
0.048
1.22
SUGGESTED LAND PATTERN
EQUIVALENT CIRCUIT
0.059 (1.5)
C0
1
L1
C1
R1
R1 Motional Resistance L1 Motional Inductance
C1 Motional Capacitance C0 Shunt Capacitance
0.092 (2.3)
2
0.160 (4.0)
inches (mm)
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
10103 - Rev E
TYPICAL APPLICATION
FOR A PIERCE OSCILLATOR
SPECIFICATIONS
Specifications are typical at 25OC unless otherwise noted.
Specifications are subject to change without notice.
Parameters
Fundamental
Overtone
32.768
100
200
Motional Resistance R1(kΩ)
Frequency, (kHz)
50
18
2.4
Motional Capacitance C1 (fF)
2.3
1.07
2.2
Quality Factor Q (k)
40
85
140
Shunt Capacitance C0 (pF)
1.1
0.7
1.2
Load Capacitance (pF)1
9
8
5
Turning Point ( C)
25
10
29
o
1
Standard Calibration Tolerance for 32.768 kHz2
Glass Lid:
+
_
30 ppm
(0.003%)
+
_
Ceramic Lid:
+
_
+
_
100 ppm
(0.01%)
Drive Level
100 ppm
(0.01%)
+
_
1000 ppm
(0.1%)
1000 ppm
(0.1%)
+
_
10000 ppm
(1.0%)
0.5 µW MAX
Temperature Coefficient (k) -0.035 ppm/OC2
Note: Frequency f at temperature T is related to frequency f0 at
turning point temperature T0 by: f-f0
2
= k(T-T0)
f0
Aging, first year
3 ppm
Shock, survival3
5,000 g, 0.3 ms, 1/2 sine
Vibration, survival
20 g RMS, 10-2,000 Hz random
Operating Temp. Range
-10OC to +70OC (Commercial)
-40OC to +85OC (Industrial)
-55OC to +125OC (Military)
Storage Temp. Range
-55OC to +125OC
Max Process Temperature
260OC for 20 sec.
1. Other values available
2. Tighter tolerances available
Drive Level
RA is used to limit the crystal’s drive level by forming a
voltage divider between RA and CD. RA also stabilizes the
oscillator against changes in the amplifiers output
resistance (R0). RA should be increased for higher voltage
operation.
Load Capacitance
The CX4 crystal calibration tolerance is influenced by the
effective circuit capacitances, specified as the load
capacitance (CL). CL is approximately equal to:
CL =
3. Higher shock available
Termination
Gold Plated
Solder Plated
Solder Dipped
Solder Plated (Pb Free)
Solder Dipped (Pb Free)
CD x CG
CD + CG
(1)
+ CS
NOTE: CD and CG include stray layout to ground and CS
is the stray shunt capacitance between the crystal
terminal. In practice, the effective value of CL will be less
than that calculated from CD, CG and CS values because
of the effect of the amplifier output resistance. CS should
be minimized.
The oscillation frequency (f0) is approximately equal to:
[
f0 = fS 1 +
Where f
S
C1
C0
TERMINATIONS
Designation
SM1
SM2
SM3
SM4
SM5
The CX4 family of surface mount crystals are ideal for
small, high density, battery operated portable products. The
CX4 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 PInetwork circuit with CD and CG provides the additional
phase shift necessary to sustain oscillation. The oscillation
frequency (f0) is 50 to 150 ppm above the crystal’s series
resonant frequency (fS).
C1
2(C0 + CL)
(2)
= Series resonant frequency of the crystal
= Motional Capacitance
= Shunt Capacitance
CONVENTIONAL CMOS
PIERCE OSCILLATOR CIRCUIT
Rf
BUFFER
PACKAGING OPTIONS
CX4VSM
]
- Tray Pack
- 16mm tape, 7” or 13” reels
AMPLIFIER
RA
OSC
Freq (fO )
(Reference tape and reel data sheet 10109)
HOW TO ORDER CX4VSM CRYSTALS
CX4V
S
C
C = Ceramic Lid
Blank = Glass Lid
“S” if special or
custom design.
Blank if standard
SM1
32.768K , 100
Frequency
K = kHz
SM1 = Gold Plated (Pb Free)
SM2 = Solder Plated
SM3 = Solder Dipped
SM4 = Solder Plated (Pb Free)
SM5 = Solder Dipped (Pb Free)
Calibration
Tolerance
@25OC
(in ppm)
/
I
Operating Temp. Range:
C = -10OC to +70OC
I = -40OC to +85OC
M = -55OC to +125OC
S = Customer Specified
CG
CX4
XTAL
CD
STATEK CORPORATION 512 N. MAIN ST., ORANGE, CA 92868 714-639-7810 FAX: 714-997-1256 www.statek.com
10103 - Rev E
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